This document provides an overview and introduction to the CS50 course. It covers topics like problem set 0, sectioning, office hours, basic C syntax like main functions and printf statements, variables, data types, libraries, operators, and compiling and running programs. Code snippets and explanations are provided for many core programming concepts.
Errors, Exceptions & Logging (PHP Hants Oct '13)James Titcumb
The talk is designed to give an entry-level introduction to how you should be handling errors, exceptions and how to effectively log in an application.
This document discusses error handling in PHP. It begins by explaining the different types of errors in PHP - notices, warnings, and fatal errors. It then provides examples of how to control which errors are displayed to the user, define custom error handlers, trigger custom errors, and use exception handling with try/catch blocks. The key aspects covered are how to intercept errors gracefully and provide user-friendly messages.
This document discusses error reporting in PHP. It defines an error as a type of mistake, such as an incorrect program state. There are three main categories of errors in PHP: informational errors, actionable errors, and fatal errors. The document also discusses how to enable errors, set the error reporting level, suppress errors, create custom error handlers, and trigger errors programmatically.
[KOSSA] C++ Programming - 17th Study - STL #3Seok-joon Yun
The document provides code examples using C++ algorithms including find, find_if, remove, remove_if, sort, merge, and accumulate. It searches vectors for values, removes elements matching conditions, sorts elements, merges sorted vectors, and calculates sums, products and other accumulations of vector elements. Each example includes the algorithm call on vector iterators and checking the results.
Diagrama de flujo de simulacion de variablesErickPea26
This document contains code to simulate random variables (y) using the central limit theorem. It takes in real data for the mean (μ) and standard deviation (σ) to perform the simulation. It will simulate n = 100 random numbers and output the simulated values to a CSV file. The code generates random numbers, calculates a sum, and uses the mean and standard deviation to simulate values for y based on the central limit theorem formula. It performs this in a while loop for the number of simulations specified by the user.
This document discusses error management in PHP. It describes different types of errors like compile-time errors, fatal errors, recoverable errors, and warnings. It also discusses how to configure error reporting using php.ini directives like error_reporting, display_errors, and log_errors. Additionally, it explains how to handle errors programmatically using set_error_handler() and exception handling. The document provides an example of throwing and catching exceptions using try/catch blocks. Finally, it discusses lazy loading of classes using the __autoload() function in PHP.
This document provides an overview and introduction to the CS50 course. It covers topics like problem set 0, sectioning, office hours, basic C syntax like main functions and printf statements, variables, data types, libraries, operators, and compiling and running programs. Code snippets and explanations are provided for many core programming concepts.
Errors, Exceptions & Logging (PHP Hants Oct '13)James Titcumb
The talk is designed to give an entry-level introduction to how you should be handling errors, exceptions and how to effectively log in an application.
This document discusses error handling in PHP. It begins by explaining the different types of errors in PHP - notices, warnings, and fatal errors. It then provides examples of how to control which errors are displayed to the user, define custom error handlers, trigger custom errors, and use exception handling with try/catch blocks. The key aspects covered are how to intercept errors gracefully and provide user-friendly messages.
This document discusses error reporting in PHP. It defines an error as a type of mistake, such as an incorrect program state. There are three main categories of errors in PHP: informational errors, actionable errors, and fatal errors. The document also discusses how to enable errors, set the error reporting level, suppress errors, create custom error handlers, and trigger errors programmatically.
[KOSSA] C++ Programming - 17th Study - STL #3Seok-joon Yun
The document provides code examples using C++ algorithms including find, find_if, remove, remove_if, sort, merge, and accumulate. It searches vectors for values, removes elements matching conditions, sorts elements, merges sorted vectors, and calculates sums, products and other accumulations of vector elements. Each example includes the algorithm call on vector iterators and checking the results.
Diagrama de flujo de simulacion de variablesErickPea26
This document contains code to simulate random variables (y) using the central limit theorem. It takes in real data for the mean (μ) and standard deviation (σ) to perform the simulation. It will simulate n = 100 random numbers and output the simulated values to a CSV file. The code generates random numbers, calculates a sum, and uses the mean and standard deviation to simulate values for y based on the central limit theorem formula. It performs this in a while loop for the number of simulations specified by the user.
This document discusses error management in PHP. It describes different types of errors like compile-time errors, fatal errors, recoverable errors, and warnings. It also discusses how to configure error reporting using php.ini directives like error_reporting, display_errors, and log_errors. Additionally, it explains how to handle errors programmatically using set_error_handler() and exception handling. The document provides an example of throwing and catching exceptions using try/catch blocks. Finally, it discusses lazy loading of classes using the __autoload() function in PHP.
The document discusses handling errors and exceptions in PHP. It defines what errors and exceptions are, describes different types of PHP errors, and ways to handle them. It also covers setting up error handling functions and using exceptions with try/catch blocks to gracefully handle errors and exceptions in code.
This document contains the code for a queue data structure implementation in Pascal. It defines a queue type with start and end indexes, initializes a queue variable, includes functions to check if the queue is empty or full and to remove or add elements. It also contains a menu program that allows testing the queue functions by removing, adding, checking status and printing the queue.
This PHP script defines constants for the log file location and authentication credentials. It authenticates the user, checks the request parameters, and if valid logs the status change to the log file before responding.
This document contains 3 functions: f(x) defines a function as 4*cos(x)-exp(x), df(x) defines the derivative of f(x) as -4*sin(x)-exp(x), and newtonraphson(x0,tol) implements Newton's method to iteratively find the root of f(x) to within a tolerance tol, starting from an initial guess x0.
This C program uses a for loop to calculate the sum and average of numbers from 1 to a user-input number. It prints the number, squared number, and cubed number each iteration. It then prints the final sum, squared sum, and cubed sum. Finally, it calculates and prints the average, squared average, and cubed average by dividing the sums by the number of iterations. The program was created by GUG U L K R U M PRODUCTIONS.
The document discusses if statements and conditional logic in shell scripts. It provides examples of using if, then, fi, elif, else and test expressions to control program flow based on exit statuses or condition results. It also discusses using who, grep and positional parameters to check for logged in users and display output.
The document contains instructions for 3 programming exercises:
1. Write a program to calculate student marks using functions like main(), getio(), calc(), disp().
2. Study a program using goto statements to direct program flow based on user input, then rewrite the program as an example using goto.
3. Rewrite a program that prints out the elements of a 2D array to instead: accept 12 numbers as input, calculate the total, and calculate the average.
Try/catch blocks in PHP allow code to execute within the try block while catching and handling any exceptions thrown in the catch block. The catch block displays errors using the Exception class, which provides methods like getMessage() and getFile() to output error details. Exceptions can also be suppressed using the @ symbol when opening files to prevent code from halting on errors.
The document discusses exception handling in C++. It defines synchronous and asynchronous exceptions and explains the purpose of exceptions is to detect and report exceptional circumstances so appropriate action can be taken. It describes the exception handling mechanism using try, throw, and catch keywords. It explains that exceptions can be rethrown from a catch block to propagate the exception outward. It provides examples of rethrowing an exception and creating a user-defined exception by inheriting from the standard exception class.
This document provides an overview of PHP (Hypertext Preprocessor) including its introduction, syntax, variables, data types, operators, control flow statements and functions. PHP is a widely used open source scripting language that allows developers to execute code server-side to generate dynamic web page content. Some key points covered include:
- PHP code is placed within <?php ?> tags in HTML documents and executed on the server.
- It supports common data types like strings, integers, arrays and objects that can be stored and manipulated using variables and operators.
- Control structures allow conditional execution and loops like if/else, switch, while, do/while and for to control program flow.
- Functions
The document discusses classes and structures in C++. It explains that classes allow for abstraction of variables and functions, as well as encapsulation. Structures are similar to classes but default members to public, while classes default members to private. The document also discusses inheritance between classes and accessing members of parent classes from child classes.
This document contains information about two Visual Basic examples:
1. A calculator control created using Visual Basic. It includes details about the control such as the name, version, and references.
2. A menu control that emulates the Windows XP style menu. It also includes details about the control like the name, version, and references as well as classes and modules used.
Both examples were decompiled on April 22, 2015 using a VB decompiler version 9.9.5484.55591. The document provides technical details about the configuration and components of the two Visual Basic example projects.
Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/1lTVeyw.
Graham Markall covers some of the common problems that can occur from using the IEEE754 floating-point arithmetic, and what to do to avoid them in practice. Filmed at qconlondon.com.
Graham Markall is an Applied Maths Developer at OpenGamma. He works on the OG-Maths library, which uses native code generation to provide an environment for developing fast and robust numerical methods from within Java. He completed a PhD at Imperial College London, where he developed a runtime compilation framework for implementing high-performance solvers for partial differential equations.
This powerpoint was shown during a Blubird event that promised its attendees to make them a better developer (also experienced developers) and drastically improve the code.
This presentation will show you common but subtle mistakes and enlighten you with a better code
I am telling about basic c such as variable,constant,operators,decison making,loops,switch,break and continue,function,call by value ,call by reference and recursion.In this pdf i give some practice problems too.
Les exceptions, oui, mais pas n'importe commentCharles Desneuf
Les exceptions sont très pratiques pour communiquer que quelque chose s'est mal passé dans un système informatique, mais mal utilisées elles peuvent rendre un système difficile à utilisé et peu fiable.
The document discusses JavaScript error and exception handling using try, catch, and finally blocks. It provides examples of using try and catch to handle exceptions, catch to retrieve error details, and finally to execute code regardless of exceptions. It also shows how to use window.onerror to handle uncaught exceptions and access error details.
PHP passes function arguments by value by default, meaning changes to a variable inside a function do not affect it outside. To pass by reference, use an ampersand when calling the function so changes inside the function also change the variable outside. References in PHP are not like pointers in C - they are aliases and do not represent memory addresses. PHP uses copy-on-write and reference counting to manage memory, only copying variable values when they are changed.
The document discusses dependency injection (DI) and different approaches to implementing DI in Ruby. It explores how to make DI composable by managing object state and resolving dependency graphs. Various Ruby techniques are presented for implementing DI containers, including instance_eval, define_singleton_method, method_missing, and TracePoint to dynamically inject dependencies at object initialization time. The goal is to think creatively about object-oriented and functional programming patterns in Ruby's dynamic context.
This document summarizes common traps to avoid in JavaScript programming. It discusses issues with global variables, type coercion with the + operator, default parsing of numbers with parseInt(), new line and semicolon insertions altering code behavior, scope assumptions across blocks, typeof() ambiguity, truthy/falsy comparisons, and recommends the book JavaScript: The Good Parts for best practices.
El documento describe los pasos para tomar una foto con una nueva cámara integrada en el monitor de una computadora: mirar a la lente, pulsar el botón "SACAR FOTO" y no moverse. Luego indica que la persona se mueva un poco a la izquierda y sonría para la foto. Al final, revela que es imposible sacar fotos con un monitor y que la persona ha sido engañada.
The document discusses handling errors and exceptions in PHP. It defines what errors and exceptions are, describes different types of PHP errors, and ways to handle them. It also covers setting up error handling functions and using exceptions with try/catch blocks to gracefully handle errors and exceptions in code.
This document contains the code for a queue data structure implementation in Pascal. It defines a queue type with start and end indexes, initializes a queue variable, includes functions to check if the queue is empty or full and to remove or add elements. It also contains a menu program that allows testing the queue functions by removing, adding, checking status and printing the queue.
This PHP script defines constants for the log file location and authentication credentials. It authenticates the user, checks the request parameters, and if valid logs the status change to the log file before responding.
This document contains 3 functions: f(x) defines a function as 4*cos(x)-exp(x), df(x) defines the derivative of f(x) as -4*sin(x)-exp(x), and newtonraphson(x0,tol) implements Newton's method to iteratively find the root of f(x) to within a tolerance tol, starting from an initial guess x0.
This C program uses a for loop to calculate the sum and average of numbers from 1 to a user-input number. It prints the number, squared number, and cubed number each iteration. It then prints the final sum, squared sum, and cubed sum. Finally, it calculates and prints the average, squared average, and cubed average by dividing the sums by the number of iterations. The program was created by GUG U L K R U M PRODUCTIONS.
The document discusses if statements and conditional logic in shell scripts. It provides examples of using if, then, fi, elif, else and test expressions to control program flow based on exit statuses or condition results. It also discusses using who, grep and positional parameters to check for logged in users and display output.
The document contains instructions for 3 programming exercises:
1. Write a program to calculate student marks using functions like main(), getio(), calc(), disp().
2. Study a program using goto statements to direct program flow based on user input, then rewrite the program as an example using goto.
3. Rewrite a program that prints out the elements of a 2D array to instead: accept 12 numbers as input, calculate the total, and calculate the average.
Try/catch blocks in PHP allow code to execute within the try block while catching and handling any exceptions thrown in the catch block. The catch block displays errors using the Exception class, which provides methods like getMessage() and getFile() to output error details. Exceptions can also be suppressed using the @ symbol when opening files to prevent code from halting on errors.
The document discusses exception handling in C++. It defines synchronous and asynchronous exceptions and explains the purpose of exceptions is to detect and report exceptional circumstances so appropriate action can be taken. It describes the exception handling mechanism using try, throw, and catch keywords. It explains that exceptions can be rethrown from a catch block to propagate the exception outward. It provides examples of rethrowing an exception and creating a user-defined exception by inheriting from the standard exception class.
This document provides an overview of PHP (Hypertext Preprocessor) including its introduction, syntax, variables, data types, operators, control flow statements and functions. PHP is a widely used open source scripting language that allows developers to execute code server-side to generate dynamic web page content. Some key points covered include:
- PHP code is placed within <?php ?> tags in HTML documents and executed on the server.
- It supports common data types like strings, integers, arrays and objects that can be stored and manipulated using variables and operators.
- Control structures allow conditional execution and loops like if/else, switch, while, do/while and for to control program flow.
- Functions
The document discusses classes and structures in C++. It explains that classes allow for abstraction of variables and functions, as well as encapsulation. Structures are similar to classes but default members to public, while classes default members to private. The document also discusses inheritance between classes and accessing members of parent classes from child classes.
This document contains information about two Visual Basic examples:
1. A calculator control created using Visual Basic. It includes details about the control such as the name, version, and references.
2. A menu control that emulates the Windows XP style menu. It also includes details about the control like the name, version, and references as well as classes and modules used.
Both examples were decompiled on April 22, 2015 using a VB decompiler version 9.9.5484.55591. The document provides technical details about the configuration and components of the two Visual Basic example projects.
Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/1lTVeyw.
Graham Markall covers some of the common problems that can occur from using the IEEE754 floating-point arithmetic, and what to do to avoid them in practice. Filmed at qconlondon.com.
Graham Markall is an Applied Maths Developer at OpenGamma. He works on the OG-Maths library, which uses native code generation to provide an environment for developing fast and robust numerical methods from within Java. He completed a PhD at Imperial College London, where he developed a runtime compilation framework for implementing high-performance solvers for partial differential equations.
This powerpoint was shown during a Blubird event that promised its attendees to make them a better developer (also experienced developers) and drastically improve the code.
This presentation will show you common but subtle mistakes and enlighten you with a better code
I am telling about basic c such as variable,constant,operators,decison making,loops,switch,break and continue,function,call by value ,call by reference and recursion.In this pdf i give some practice problems too.
Les exceptions, oui, mais pas n'importe commentCharles Desneuf
Les exceptions sont très pratiques pour communiquer que quelque chose s'est mal passé dans un système informatique, mais mal utilisées elles peuvent rendre un système difficile à utilisé et peu fiable.
The document discusses JavaScript error and exception handling using try, catch, and finally blocks. It provides examples of using try and catch to handle exceptions, catch to retrieve error details, and finally to execute code regardless of exceptions. It also shows how to use window.onerror to handle uncaught exceptions and access error details.
PHP passes function arguments by value by default, meaning changes to a variable inside a function do not affect it outside. To pass by reference, use an ampersand when calling the function so changes inside the function also change the variable outside. References in PHP are not like pointers in C - they are aliases and do not represent memory addresses. PHP uses copy-on-write and reference counting to manage memory, only copying variable values when they are changed.
The document discusses dependency injection (DI) and different approaches to implementing DI in Ruby. It explores how to make DI composable by managing object state and resolving dependency graphs. Various Ruby techniques are presented for implementing DI containers, including instance_eval, define_singleton_method, method_missing, and TracePoint to dynamically inject dependencies at object initialization time. The goal is to think creatively about object-oriented and functional programming patterns in Ruby's dynamic context.
This document summarizes common traps to avoid in JavaScript programming. It discusses issues with global variables, type coercion with the + operator, default parsing of numbers with parseInt(), new line and semicolon insertions altering code behavior, scope assumptions across blocks, typeof() ambiguity, truthy/falsy comparisons, and recommends the book JavaScript: The Good Parts for best practices.
El documento describe los pasos para tomar una foto con una nueva cámara integrada en el monitor de una computadora: mirar a la lente, pulsar el botón "SACAR FOTO" y no moverse. Luego indica que la persona se mueva un poco a la izquierda y sonría para la foto. Al final, revela que es imposible sacar fotos con un monitor y que la persona ha sido engañada.
Wael Mohamed Salhin is seeking a challenging position in management, HR, business development, or marketing in a multinational company. He has over 15 years of experience managing teams and day-to-day store operations in retail. His most recent role was Executive Director at Istikbal Company For Modern Furniture where he was responsible for managing teams, maximizing sales and profits, and ensuring effective stock management.
El documento contiene 20 invitaciones del club Atlético Nacional dirigidas a diferentes personas para que se presenten a las divisiones menores del club. Las invitaciones indican que el evento tendrá lugar el 3 de enero de 2029 a las 9:30 am en Guarne, Antioquia.
Mapa mental dato, información, sistema y programajenny allendes
Este documento define conceptos clave como datos, información, sistema y programa. Los datos son cifras o instrucciones sin significado hasta que se organizan y procesan para extraer conocimiento, lo que constituye información. Un sistema está conformado por subsistemas y elementos relacionados que interactúan con el medio ambiente para cumplir tareas. Un programa es un conjunto de instrucciones que ordena actividades y procesa información para desarrollar funciones.
El poema trata sobre la amistad y cuestiona el significado de la palabra "amigos" a través de preguntas retóricas sobre la lealtad y el apoyo mutuo entre amigos.
La participación de los usuarios del blog del Centro de Información de la Uni...André Maguiña Ballón
El presente trabajo de investigación analiza la participación de los usuarios del blog del Centro de Información de la Universidad Peruana de Ciencias Aplicadas (UPC), a través de la realización de comentarios. A su vez, se compara dicha participación con los posts que están publicados en el perfil institucional en Facebook, con el fin de validar las siguientes hipótesis:
• La participación de los usuarios en la creación de comentarios en el blog del Centro de Información es baja.
• La participación de los usuarios en la creación de comentarios en los posts del Centro de Información que están en el Facebook institucional es mayor proporcionalmente que la participación directa en el blog.
Asimismo, se clasifican los comentarios realizados según las siguientes categorías: quejas o críticas, preguntas o consultas, opiniones o sugerencias, y comentarios ajenos al contenido del post.
Para determinar el grado de participación, se usa la valoración dada por Noa Aharony (2010), quien establece el rango de 0 a 10 comentarios por post como una baja participación. El alcance temporal del estudio comprende el período de marzo de 2010 a septiembre de 2012
Del análisis de resultados, se confirman las hipótesis planteadas y se sugiere la implementación de un Facebook propio para el Centro de Información.
El fenómeno de El Niño es un calentamiento de las aguas del Pacífico que afecta principalmente el Sureste Asiático, Australia y Sudamérica, generando cambios climáticos como aumento de temperatura, lluvias e intensas sequías. Se produce cuando las aguas cálidas del norte ingresan al mar frente a Perú, y ha ocurrido cada 7 milenios aproximadamente desde la época de Navidad, por lo que recibe ese nombre. Sus principales consecuencias son lluvias intensas, pérdidas pesqueras, enfer
La familia es la primera relación social y de afecto que se establece. Enseña valores y brinda apoyo a sus miembros. Una familia unida puede enfrentar los desafíos de la vida de manera conjunta.
Vijay Patel is seeking a position utilizing his skills in administration, management, and personnel. He has over 15 years of experience in parts sales management and automotive repair. His experience includes supervising personnel, financial administration, marketing, and providing technical advice to customers. He is ASE certified with a master certification and knowledgeable about automotive parts inventory software.
LoviSil® joints provide a reliable connection for paper-insulated and polymeric cables up to 12 kV. They use silicone-based insulation material that remains fluid, minimizing the risk of discharge. The joints have been tested and approved according to industry standards. A variety of joint modules are available to accommodate different cable sizes in a flexible system.
Ghana: Karite Nuts (Shea Nuts) - Market Report. Analysis And Forecast To 2025IndexBox Marketing
IndexBox Marketing has just published its report: “Ghana: Karite Nuts (Shea Nuts) - Market Report. Analysis And Forecast To 2025”.
The report provides an in-depth analysis of the karite nuts (shea nuts) market in the Ghana. It presents the latest data of the market value, consumption, domestic production, exports and imports, price dynamics and food balance. The report shows the sales data, allowing you to identify the key drivers and restraints. Forecasts illustrate how the market will be transformed in the medium term.
The document discusses employee welfare at NTPC Ltd. NTPC Ltd is India's largest power company established in 1975 to accelerate power development. It generates power through coal and gas. NTPC ranks among the largest companies in the world and was the first power utility in India to conduct environmental impact assessments. NTPC performs its social responsibilities efficiently and aims to provide a satisfactory job satisfaction level for employees. The document focuses on the importance of employee welfare and the various types of welfare measures taken at NTPC Ltd to care for employees.
Khushhali Bank is the Pakistani government first major government initiative to bridge the demand for microfinance services. The bank operates on a community-based service delivery mechanism and forms client clusters to reduce transactional costs
Elegant Ways of Handling PHP Errors and ExceptionsZendCon
Murphy was right: things will go wrong in any given situation if you only give them a chance. Therefore this session will discuss ways of limiting the risk of things going wrong in your application.
This document provides an overview of PHP basics including:
- How a web request is processed with PHP
- PHP syntax and tags
- Data types like scalars, arrays, and objects
- Variables, naming conventions, and scopes
- Language constructs like if/else, switch, loops, and functions
- Operators, error handling, and best practices for writing clear code
This is a presentation compiled by Mihai Gutuleac, on the topic of "Debugging methods". It presents a list of useful and handy tools and error handler frameworks which will help web developers to easily find out and debug the errors and also to handle more appropriate the raised exceptions in their web applications.
With this presentation I hope to show that using SPL doesn't require a PHD and that it really benefits your application design, maintainability and implements best practices to solve common development problems.
This document provides tips, tricks, and examples of common gotchas in PHP programming. It demonstrates unexpected behaviors that can occur due to PHP's highly dynamic nature and weakly typed system. A series of code snippets are shown with their expected versus actual outputs to illustrate issues one may encounter with variables, strings, arrays, and type coercion. The document also provides best practices for PHP development and an overview of common topics covered in the PHP certification exam.
This document discusses PHPSpec, a behavior-driven development (BDD) framework for PHP. It begins by explaining what PHPSpec is and how it implements BDD through a domain-specific language (DSL) based on RSpec. The document then covers how PHPSpec specifies tests using contexts, examples, expectations, matchers, mocks, and stubs. It provides examples of writing PHPSpec tests and using various PHPSpec features. The document concludes by mentioning upcoming PHPSpec features and linking to resources for learning more.
1) The document provides an introduction to PHP basics including variables, data types, operators, and form handling. It explains how to store data in variables, assign values, destroy variables, and inspect variable contents.
2) Various PHP data types are covered such as integers, floats, strings, booleans, and NULL. Arithmetic, comparison, logical and assignment operators are also explained.
3) The document demonstrates how to manipulate variables using operators, perform arithmetic operations, concatenate strings, compare variables, and perform logical tests.
PHP has its own treasure chest of classic mistakes that surprises even the most seasoned expert : code that dies just by changing its namespace, strpos() that fails to find strings or arrays that changes without touching them.
Do that get on your nerves too ? Let’s make a list of them, so we can always teach them to the new guys, spot them during code reviews and kick them out of our code once and for all. Come on, you’re not frightening us !
This document discusses errors, exceptions, and logging in PHP. It describes the different types of PHP errors and how exceptions can be used to handle errors and failures more object-oriented way. Exceptions allow for more descriptive error handling than basic errors. The document also recommends logging errors and exceptions for easier debugging. Various logging options for PHP are presented, including Monolog and other libraries that support the PSR-3 logging standard. Capturing errors, exceptions, and logging messages is discussed.
This document provides an overview of PHP including:
- Basic PHP syntax like variables, data types, operators, and control structures
- Functions - both built-in and user-defined, including arguments and return values
- Loops - while, do-while, for, foreach
- Object-oriented concepts like classes, objects, constructors, inheritance
- Arrays - indexed, associative, and multidimensional
- Strings and math functions
- An introduction to abstraction and object-oriented programming principles in PHP
This document discusses an introduction to PHP and then lists 7 problems with the PHP language. It outlines some of PHP's benefits like being the most popular server-side language and being easy to deploy. However, it notes issues with templating, inconsistencies, everything being treated as a function, unequal equality comparisons, weird scoping, terrible debugging, and poor documentation. In the end, it concludes that these issues don't matter too much.
The document discusses exception handling in C and C++. It covers exception fundamentals, and techniques for handling exceptions in C such as return values, global variables, goto statements, signals, and termination functions. It also discusses exception handling features introduced in C++ such as try/catch blocks and exception specifications.
This document summarizes a lightning talk on exceptions in Perl. It discusses defensive programming and the need to anticipate errors or incorrect input. It covers detecting exceptions, classifying exceptions by type and severity, and reporting exceptions. Finally, it reviews different methods for handling exceptions in Perl, including return codes, eval/die/rethrow, and various CPAN exception modules like Class::Throwable that provide try/catch functionality similar to other languages.
Exception Handling: Designing Robust Software in RubyWen-Tien Chang
The document discusses exception handling in Ruby. It begins with explaining why exception handling is important for building robust software. It then covers various aspects of exception handling in Ruby including raising exceptions, rescuing exceptions, ensuring code is executed, retrying code, and using else blocks. It provides guidelines for proper exception handling practices such as only raising exceptions for unexpected situations. The document concludes by discussing different failure handling strategies like ensuring exception safety and categorizing operational errors versus programmer errors.
The document discusses fault tolerance in Elixir and Erlang. Some key points discussed include: accepting that failures will occur and focusing on the normal case; letting processes crash gracefully and handling crashes through supervision; using tools like monitors, links, and supervisors to restart crashed processes and maintain fault tolerance; common mistakes like poor supervision structures and not handling expected errors properly; and benefits like less code, fewer bugs, and faster fixes through crash-and-restart approaches to fault tolerance. The document provides an overview of these concepts and best practices for building robust and resilient Elixir systems.
Exceptions in Java represent errors or unexpected conditions that disrupt normal program flow. There are different types of exceptions including checked exceptions that must be declared and handled, unchecked exceptions for runtime errors, and errors for JVM-level issues. Best practices for exceptions include throwing checked exceptions when the caller can recover, unchecked for non-recoverable errors, logging exceptions at the latest point, and following conventions like defining an exception hierarchy. Exceptions should provide context about what went wrong and where.
Webinar Darkmira PHParty7 France - Présentation du nouvel opérateur ternaire couplé à la fonction isset, l'opérateur ?? qui retourne le résultat à gauche de l'opérateur si celui-ci n'est pas null sinon celui de droite.
Webinar Darkmira PHParty7 France - Présentation d'une des principales incompatibilités de la nouvelle version PHP7, l'uniformisation de la syntaxe des variables
Webinar Darkmira PHParty7 France - Présentation des avantages de la nouvelle fonctionnalité de php7, le support des types scalaires dans la définition des arguments d'une fonction
Ready to Unlock the Power of Blockchain!Toptal Tech
Imagine a world where data flows freely, yet remains secure. A world where trust is built into the fabric of every transaction. This is the promise of blockchain, a revolutionary technology poised to reshape our digital landscape.
Toptal Tech is at the forefront of this innovation, connecting you with the brightest minds in blockchain development. Together, we can unlock the potential of this transformative technology, building a future of transparency, security, and endless possibilities.
Discover the benefits of outsourcing SEO to Indiadavidjhones387
"Discover the benefits of outsourcing SEO to India! From cost-effective services and expert professionals to round-the-clock work advantages, learn how your business can achieve digital success with Indian SEO solutions.
Gen Z and the marketplaces - let's translate their needsLaura Szabó
The product workshop focused on exploring the requirements of Generation Z in relation to marketplace dynamics. We delved into their specific needs, examined the specifics in their shopping preferences, and analyzed their preferred methods for accessing information and making purchases within a marketplace. Through the study of real-life cases , we tried to gain valuable insights into enhancing the marketplace experience for Generation Z.
The workshop was held on the DMA Conference in Vienna June 2024.
HijackLoader Evolution: Interactive Process HollowingDonato Onofri
CrowdStrike researchers have identified a HijackLoader (aka IDAT Loader) sample that employs sophisticated evasion techniques to enhance the complexity of the threat. HijackLoader, an increasingly popular tool among adversaries for deploying additional payloads and tooling, continues to evolve as its developers experiment and enhance its capabilities.
In their analysis of a recent HijackLoader sample, CrowdStrike researchers discovered new techniques designed to increase the defense evasion capabilities of the loader. The malware developer used a standard process hollowing technique coupled with an additional trigger that was activated by the parent process writing to a pipe. This new approach, called "Interactive Process Hollowing", has the potential to make defense evasion stealthier.
8. Fatal Errors
● Fatal errors cannot be gracefully handled
● Error handler is not called
● Finally block will not be invoked
● Destructors are not called
11. Error & Exception handling
Errors and fatal errors handling
try {
inexistant_function();
} catch (Error $e) {
echo 'Error: '.$e->getMessage();
}
// PHP5:
// Fatal error: Call to undefined function
// inexistant_function() in …
// PHP7:
// Error: Call to undefined function inexistant_function()
12. Bibliography
RFC for EngineException: https://wiki.php.net/rfc/engine_exceptions_for_php7
Reviewed RFC about Throwable: https://wiki.php.net/rfc/throwable-interface
Article about PHP7 Throwable and Errors: https://trowski.com/2015/06/24/throwable-exceptions-and-errors-
in-php7/
Stackoverflow, Errors VS Exception:http://stackoverflow.com/questions/…