This document provides a history and overview of PHP, a widely used open source scripting language for web development. It discusses the origins and creators of PHP, the major versions released over time with new features, and some of the standard data types that can be used in PHP like integers, strings, arrays, and objects. The document also introduces basic PHP concepts like variables, data types, and how the gettype() function can be used to determine the type of a variable.
Buffer overflows have been the most common security vulnerability for the last few years. These are considered as one of the oldest and more reliable methods. Due to the latest linux defences it has become difficult to attack using traditional buffer overflow technique . This led to the development of the return-oriented programming technique.
Return-oriented programming is a type of security attack, in which you can take the control over saved instruction pointer and can induce unpredictable behavior in a program in which exploit is under our control without injecting any malicious code.
In this presentation I will trace the origins of ROP and some related techniques such as Call and Jump Oriented Programming as well as some advanced techniques like JIT-ROP, BROP and SROP.
Exploit Research and Development Megaprimer: Win32 EgghunterAjin Abraham
Exploit Research and Development Megaprimer
http://opensecurity.in/exploit-research-and-development-megaprimer/
http://www.youtube.com/playlist?list=PLX3EwmWe0cS_5oy86fnqFRfHpxJHjtuyf
Ein Stall voller Trüffelschweine - (PHP-)Profiling-Tools im Überblickrenebruns
An overview of PHP profiling tools was presented. The presentation began with an introduction to profiling and why it is useful for developers. Common issues that can be identified through profiling like slow JavaScript code, high memory usage, and inefficient database queries were discussed. Tools for profiling at the browser, frontend, backend, and database level were then covered in detail including Chrome DevTools, Xdebug, XHProf, and using EXPLAIN queries. The presentation concluded with best practices for profiling like starting broadly and narrowing down the issue, verifying optimizations worked, and using benchmarks like Apache Benchmark.
PHPUnit is a unit testing framework for PHP that allows developers to write and run automated tests to validate that sections of code are working properly. A unit test verifies that a specific part of a program performs as expected. PHPUnit makes it possible to mock external dependencies to isolate units for testing. It provides assertions to validate test outcomes and facilities for running tests and reporting results.
This document discusses various ways to customize and extend PHP beyond its typical usage as a templating language. It explores how PHP's opcode cache, extensions, object model, and virtual machine can be leveraged. It also provides examples of PHP's lexer, parser, and how opcodes are generated from PHP code.
This document discusses extending Perl with C libraries using XS. It explains that XS provides an interface between C and Perl by handling data conversion between their different types. The document outlines the components of a basic XS file and how it is compiled. It also discusses typemaps which define how C types are mapped to Perl types to allow values to be passed between the languages. Further details are provided on developing the XS interface and common tools like h2xs and a new converter tool.
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 various types of bugs and bad programming practices that can lead to bugs. It provides examples of bugs caused by issues like buffer overflows, forgetting to check function arguments, accessing null pointers, memory leaks, and lack of compiler optimization. The document emphasizes the importance of defensive coding practices like input validation, error handling, and testing to avoid bugs.
Buffer overflows have been the most common security vulnerability for the last few years. These are considered as one of the oldest and more reliable methods. Due to the latest linux defences it has become difficult to attack using traditional buffer overflow technique . This led to the development of the return-oriented programming technique.
Return-oriented programming is a type of security attack, in which you can take the control over saved instruction pointer and can induce unpredictable behavior in a program in which exploit is under our control without injecting any malicious code.
In this presentation I will trace the origins of ROP and some related techniques such as Call and Jump Oriented Programming as well as some advanced techniques like JIT-ROP, BROP and SROP.
Exploit Research and Development Megaprimer: Win32 EgghunterAjin Abraham
Exploit Research and Development Megaprimer
http://opensecurity.in/exploit-research-and-development-megaprimer/
http://www.youtube.com/playlist?list=PLX3EwmWe0cS_5oy86fnqFRfHpxJHjtuyf
Ein Stall voller Trüffelschweine - (PHP-)Profiling-Tools im Überblickrenebruns
An overview of PHP profiling tools was presented. The presentation began with an introduction to profiling and why it is useful for developers. Common issues that can be identified through profiling like slow JavaScript code, high memory usage, and inefficient database queries were discussed. Tools for profiling at the browser, frontend, backend, and database level were then covered in detail including Chrome DevTools, Xdebug, XHProf, and using EXPLAIN queries. The presentation concluded with best practices for profiling like starting broadly and narrowing down the issue, verifying optimizations worked, and using benchmarks like Apache Benchmark.
PHPUnit is a unit testing framework for PHP that allows developers to write and run automated tests to validate that sections of code are working properly. A unit test verifies that a specific part of a program performs as expected. PHPUnit makes it possible to mock external dependencies to isolate units for testing. It provides assertions to validate test outcomes and facilities for running tests and reporting results.
This document discusses various ways to customize and extend PHP beyond its typical usage as a templating language. It explores how PHP's opcode cache, extensions, object model, and virtual machine can be leveraged. It also provides examples of PHP's lexer, parser, and how opcodes are generated from PHP code.
This document discusses extending Perl with C libraries using XS. It explains that XS provides an interface between C and Perl by handling data conversion between their different types. The document outlines the components of a basic XS file and how it is compiled. It also discusses typemaps which define how C types are mapped to Perl types to allow values to be passed between the languages. Further details are provided on developing the XS interface and common tools like h2xs and a new converter tool.
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 various types of bugs and bad programming practices that can lead to bugs. It provides examples of bugs caused by issues like buffer overflows, forgetting to check function arguments, accessing null pointers, memory leaks, and lack of compiler optimization. The document emphasizes the importance of defensive coding practices like input validation, error handling, and testing to avoid bugs.
UnQLite is an embedded key-value and document-oriented database with a simple API similar to SQLite. It uses a BSD license and supports cross-platform usage. Benchmarks show it has comparable or better performance than SQLite, Berkeley DB and other databases for common operations like storing, fetching, and iterating over large amounts of data. The developer is working on adding new storage engines to UnQLite.
1. The document describes how a custom Java applet integrates with Oracle Forms to provide recipe/formula/routing design functionality. It discusses communication between the applet and Forms, the structure of the applet code, debugging techniques, and setup instructions.
2. The applet code is divided into common, client, and server packages. The client code runs in a browser and communicates with server code via data managers. Server code interacts with the database through JDBC and PL/SQL packages.
3. Debugging involves using print statements in the client code and log files in the server code. The applet is set up by configuring the JDeveloper IDE and importing required Forms
The document discusses PHP performance and dives into the internals of how PHP works, including details on the Zend engine, compilation process involving lexing, parsing and compiling to opcodes, and execution through opcode interpretation by the virtual machine. It provides examples and tips on optimizing performance by reducing compilation overhead through opcode caching, profiling execution to find bottlenecks, and analyzing PHP functions at the C level to optimize system calls and memory usage.
The document discusses the configuration of the fastcgi_param directive in the nginx fastcgi_conf file. It explains the purpose and value of each parameter line, including parameters for the script filename, query string, request method, content type, length, URI, server protocol, and more. Key variables like $document_root, $fastcgi_script_name, and $remote_addr are also described. A second section covers the mime.types file and defines common file extensions and their associated MIME types.
The document discusses analyzing crashes using WinDbg. It provides tips on reconstructing crashed call stacks and investigating what thread or lock is causing a hang. The debugging commands discussed include !analyze, !locks, .cxr, kb to find the crashing function and stuck thread.
This document discusses PHP streams and provides examples of their usage. It covers stream transports, wrappers, contexts, and filters. Transports allow communication over sockets, wrappers define protocols like HTTP and FTP, contexts modify stream behavior, and filters modify data as it is read and written. Custom stream wrappers can also be implemented to define new protocols.
This document provides an overview of PHP's virtual machine. It discusses how PHP works internally, including:
- PHP is interpreted by a software virtual machine written in C called the Zend Engine.
- The Zend Engine compiles PHP code to opcodes, performs optimizations, and then executes the opcodes by interpreting them one by one.
- Key parts of the compilation process include lexical analysis, semantic analysis/parsing, and opcode generation. Optimizations are then performed by the opcache extension.
- Execution involves interpreting each opcode through handler functions. Common opcodes like ZEND_ECHO and ZEND_CONCAT are discussed as examples.
- The opcode cache stores pre-compiled code
PHP isn't only used as a web-based scripting language, it can also be used on the command line.
This talks explains the benefits of command line PHP. Additionally, process control using CLI PHP is explained.
This document provides information about data types and variables in Java. It discusses the basic data types like int, float, boolean etc. and their ranges. It also covers arrays, literals, identifiers, comments, keywords, operators and variables. For each topic, it provides details on syntax and examples. The document is an introduction to basic data types and variables in Java.
IPC2010SE Doctrine2 Enterprise Persistence Layer for PHPGuilherme Blanco
The document provides an overview of Doctrine 2, an object-relational mapper (ORM) for PHP. It discusses the key components of Doctrine 2 including Common, DBAL, and ORM. Common includes cache drivers, class loading, collections, and annotations parsing functionality. DBAL provides a database abstraction layer built on PDO and supports drivers for databases like MySQL, PostgreSQL, SQLite. ORM provides object-relational mapping functionality to map database rows to PHP objects. The document also discusses performance comparisons showing Doctrine 2 can be faster than raw PHP for certain operations like inserts due to its use of transactions.
PHP 5.5 is the latest version of PHP that includes new features like a password hashing API, generators syntax, and a finally keyword for exceptions. It also includes performance improvements and integration with the OPcache for opcode caching. Some changes in PHP 5.5 include deprecating the mysql extension and preg_replace /e modifier.
The documents contain code for initializing a keypad and LCD display, initializing ESP module SPI registers, and generating attendance reports. The keypad and LCD code initializes the keypad and LCD libraries and prints input from the keypad to the LCD. The ESP module code shows the SPI register values and has functions for SPI master and slave modes. The attendance report code has a function to get attendance master metadata including batch, division, and academic calendar details based on an ID.
Perl 5.24 was released in 2016 with several notable changes including hashbang redirection to Perl 6, removal of autodereferencing, and performance enhancements. Perl 6 development progressed with the release of the Christmas roast specification tests and Rakudo becoming more stable on MoarVM while work continued on implementations for other platforms like JVM and JavaScript. The Perl community continued to enhance CPAN and develop new features for Perl 6 like TWEAK submethods and lexical module loading.
The document discusses the basics of HTTP and web servers. It provides details on HTTP methods and requests/responses. It also describes common web servers like Apache and Nginx. Apache uses modules and multi-processing models like prefork and worker. It executes CGI scripts through processes and uses handlers for different file types.
This document contains instructions for experiments in the subjects of Unix Systems Programming (USP) and Compiler Design for a lab course. It lists 12 experiments for USP involving processes, inter-process communication, file locking, and avoiding zombie processes. It also lists 2 experiments for Compiler Design involving syntax-directed definitions and regular expressions. For each USP experiment, example C/C++ code is provided to demonstrate the concept along with sample output.
PHP 7 is scheduled for release in November 2015 and will be a major new version that introduces many new features and changes. Some key points include: PHP 7 will provide improved performance through a new Zend Engine 3.0 and full support for 32-bit and 64-bit platforms. New features include scalar type declarations, return type declarations, new operators like the null coalesce operator and the spaceship operator, and anonymous classes. The release will also change some behaviors and remove deprecated features.
Better detection of what modules are used by some Perl 5 codecharsbar
This document discusses Perl::PrereqScanner::NotQuiteLite, a module that detects which modules are used by Perl 5 code in a more accurate way than existing tools. It summarizes that Perl::PrereqScanner::NotQuiteLite can detect module requirements across a wide range of frameworks and syntax, including Moose, Catalyst, and Test::More. It also migrates the detection of module requirements from Perl::PrereqScanner to Perl::PrereqScanner::NotQuiteLite and describes how to update CPAN files and test them based on the module usage detected.
This document provides an introduction to test-driven development (TDD) and unit testing in PHP. It discusses where to start with TDD, what unit tests are, and tools to use like PHPUnit. It covers the red-green-refactor TDD cycle and topics like mocking dependencies, handling file systems and databases in tests, and continuous integration. The goal is to help PHP developers get started with TDD.
The document discusses performance improvements in PHP 7 compared to PHP 5. It summarizes profiling results that show PHP 7 code runs 25% faster and uses 30% less memory than PHP 5 code. It then discusses various internal optimizations in PHP 7 that provide these performance gains, such as improved compiler optimizations, more efficient variable, hashtable and string handling. The document provides examples of how these internal changes help optimize CPU cache usage and reduce memory overhead.
This document provides an introduction and overview of PHP. It states that PHP is a server-side scripting language commonly used for web development. It can be embedded into HTML and is free, efficient and compatible with many platforms and servers. The document then covers basic PHP syntax, variables, data types, operators, conditional statements and loops. It provides examples to illustrate key PHP concepts and functions.
PHP7 brings a tremendous number of new features. Tonight, we will take a look at the null coalesce operator, new execution order (uniform variable syntax), new exceptions and more.
UnQLite is an embedded key-value and document-oriented database with a simple API similar to SQLite. It uses a BSD license and supports cross-platform usage. Benchmarks show it has comparable or better performance than SQLite, Berkeley DB and other databases for common operations like storing, fetching, and iterating over large amounts of data. The developer is working on adding new storage engines to UnQLite.
1. The document describes how a custom Java applet integrates with Oracle Forms to provide recipe/formula/routing design functionality. It discusses communication between the applet and Forms, the structure of the applet code, debugging techniques, and setup instructions.
2. The applet code is divided into common, client, and server packages. The client code runs in a browser and communicates with server code via data managers. Server code interacts with the database through JDBC and PL/SQL packages.
3. Debugging involves using print statements in the client code and log files in the server code. The applet is set up by configuring the JDeveloper IDE and importing required Forms
The document discusses PHP performance and dives into the internals of how PHP works, including details on the Zend engine, compilation process involving lexing, parsing and compiling to opcodes, and execution through opcode interpretation by the virtual machine. It provides examples and tips on optimizing performance by reducing compilation overhead through opcode caching, profiling execution to find bottlenecks, and analyzing PHP functions at the C level to optimize system calls and memory usage.
The document discusses the configuration of the fastcgi_param directive in the nginx fastcgi_conf file. It explains the purpose and value of each parameter line, including parameters for the script filename, query string, request method, content type, length, URI, server protocol, and more. Key variables like $document_root, $fastcgi_script_name, and $remote_addr are also described. A second section covers the mime.types file and defines common file extensions and their associated MIME types.
The document discusses analyzing crashes using WinDbg. It provides tips on reconstructing crashed call stacks and investigating what thread or lock is causing a hang. The debugging commands discussed include !analyze, !locks, .cxr, kb to find the crashing function and stuck thread.
This document discusses PHP streams and provides examples of their usage. It covers stream transports, wrappers, contexts, and filters. Transports allow communication over sockets, wrappers define protocols like HTTP and FTP, contexts modify stream behavior, and filters modify data as it is read and written. Custom stream wrappers can also be implemented to define new protocols.
This document provides an overview of PHP's virtual machine. It discusses how PHP works internally, including:
- PHP is interpreted by a software virtual machine written in C called the Zend Engine.
- The Zend Engine compiles PHP code to opcodes, performs optimizations, and then executes the opcodes by interpreting them one by one.
- Key parts of the compilation process include lexical analysis, semantic analysis/parsing, and opcode generation. Optimizations are then performed by the opcache extension.
- Execution involves interpreting each opcode through handler functions. Common opcodes like ZEND_ECHO and ZEND_CONCAT are discussed as examples.
- The opcode cache stores pre-compiled code
PHP isn't only used as a web-based scripting language, it can also be used on the command line.
This talks explains the benefits of command line PHP. Additionally, process control using CLI PHP is explained.
This document provides information about data types and variables in Java. It discusses the basic data types like int, float, boolean etc. and their ranges. It also covers arrays, literals, identifiers, comments, keywords, operators and variables. For each topic, it provides details on syntax and examples. The document is an introduction to basic data types and variables in Java.
IPC2010SE Doctrine2 Enterprise Persistence Layer for PHPGuilherme Blanco
The document provides an overview of Doctrine 2, an object-relational mapper (ORM) for PHP. It discusses the key components of Doctrine 2 including Common, DBAL, and ORM. Common includes cache drivers, class loading, collections, and annotations parsing functionality. DBAL provides a database abstraction layer built on PDO and supports drivers for databases like MySQL, PostgreSQL, SQLite. ORM provides object-relational mapping functionality to map database rows to PHP objects. The document also discusses performance comparisons showing Doctrine 2 can be faster than raw PHP for certain operations like inserts due to its use of transactions.
PHP 5.5 is the latest version of PHP that includes new features like a password hashing API, generators syntax, and a finally keyword for exceptions. It also includes performance improvements and integration with the OPcache for opcode caching. Some changes in PHP 5.5 include deprecating the mysql extension and preg_replace /e modifier.
The documents contain code for initializing a keypad and LCD display, initializing ESP module SPI registers, and generating attendance reports. The keypad and LCD code initializes the keypad and LCD libraries and prints input from the keypad to the LCD. The ESP module code shows the SPI register values and has functions for SPI master and slave modes. The attendance report code has a function to get attendance master metadata including batch, division, and academic calendar details based on an ID.
Perl 5.24 was released in 2016 with several notable changes including hashbang redirection to Perl 6, removal of autodereferencing, and performance enhancements. Perl 6 development progressed with the release of the Christmas roast specification tests and Rakudo becoming more stable on MoarVM while work continued on implementations for other platforms like JVM and JavaScript. The Perl community continued to enhance CPAN and develop new features for Perl 6 like TWEAK submethods and lexical module loading.
The document discusses the basics of HTTP and web servers. It provides details on HTTP methods and requests/responses. It also describes common web servers like Apache and Nginx. Apache uses modules and multi-processing models like prefork and worker. It executes CGI scripts through processes and uses handlers for different file types.
This document contains instructions for experiments in the subjects of Unix Systems Programming (USP) and Compiler Design for a lab course. It lists 12 experiments for USP involving processes, inter-process communication, file locking, and avoiding zombie processes. It also lists 2 experiments for Compiler Design involving syntax-directed definitions and regular expressions. For each USP experiment, example C/C++ code is provided to demonstrate the concept along with sample output.
PHP 7 is scheduled for release in November 2015 and will be a major new version that introduces many new features and changes. Some key points include: PHP 7 will provide improved performance through a new Zend Engine 3.0 and full support for 32-bit and 64-bit platforms. New features include scalar type declarations, return type declarations, new operators like the null coalesce operator and the spaceship operator, and anonymous classes. The release will also change some behaviors and remove deprecated features.
Better detection of what modules are used by some Perl 5 codecharsbar
This document discusses Perl::PrereqScanner::NotQuiteLite, a module that detects which modules are used by Perl 5 code in a more accurate way than existing tools. It summarizes that Perl::PrereqScanner::NotQuiteLite can detect module requirements across a wide range of frameworks and syntax, including Moose, Catalyst, and Test::More. It also migrates the detection of module requirements from Perl::PrereqScanner to Perl::PrereqScanner::NotQuiteLite and describes how to update CPAN files and test them based on the module usage detected.
This document provides an introduction to test-driven development (TDD) and unit testing in PHP. It discusses where to start with TDD, what unit tests are, and tools to use like PHPUnit. It covers the red-green-refactor TDD cycle and topics like mocking dependencies, handling file systems and databases in tests, and continuous integration. The goal is to help PHP developers get started with TDD.
The document discusses performance improvements in PHP 7 compared to PHP 5. It summarizes profiling results that show PHP 7 code runs 25% faster and uses 30% less memory than PHP 5 code. It then discusses various internal optimizations in PHP 7 that provide these performance gains, such as improved compiler optimizations, more efficient variable, hashtable and string handling. The document provides examples of how these internal changes help optimize CPU cache usage and reduce memory overhead.
This document provides an introduction and overview of PHP. It states that PHP is a server-side scripting language commonly used for web development. It can be embedded into HTML and is free, efficient and compatible with many platforms and servers. The document then covers basic PHP syntax, variables, data types, operators, conditional statements and loops. It provides examples to illustrate key PHP concepts and functions.
PHP7 brings a tremendous number of new features. Tonight, we will take a look at the null coalesce operator, new execution order (uniform variable syntax), new exceptions and more.
This document provides tips for debugging PHP Cake applications. It discusses using XDebug to trace code, view context and variable contents using debug() and var_dump(), and prevent errors from breaking production. It recommends using DebugKit, monitoring tools like Redis-live and Varnishstat, and notifying on errors. Verbose logging with sgLogMessage and unifying logs with Logstash are also covered. Finally, it discusses aggregating metrics with Graphite and Statsd.
Those slides, inspired by the works and ideas of many, are a state of what PHP gets in upgrades as of Q1 2018.
Market share and evolution.
PHP 7.0
PHP Ecology
PHP 7.3 Cool stuff.
Rcpp11 is a header-only rewrite of Rcpp that uses C++11 features and has a simpler interface. It has fewer constructors for NumericVector compared to Rcpp, with 11 versus 23. Rcpp11 also includes features like internal C++ try/catch blocks to safely handle errors from R code without needing R's tryCatch, and functions like R_PreserveObject and R_ReleaseObject to manage object lifetimes across R garbage collections.
QEMU is an open source system emulator that uses just-in-time (JIT) compilation to achieve high performance system emulation. It works by translating target CPU instructions to simple host CPU micro-operations at runtime. These micro-operations are cached and chained together into basic blocks to reduce overhead. This approach avoids the performance issues of traditional emulators by removing interpretation overhead and leveraging CPU parallelism through pipelining of basic blocks.
PHP is a server-side scripting language used for web development. It allows developers to add dynamic content and functionality to websites. Some key points about PHP from the document:
- PHP code is embedded into HTML and executed on the server to create dynamic web page content. It can be used to connect to databases, process forms, and more.
- PHP has many data types including strings, integers, floats, booleans, arrays, objects, null values and resources. Variables, operators, and conditional statements allow for control flow and data manipulation.
- Common PHP structures include if/else statements for conditional logic, loops like for/while/foreach for iteration, and functions for reusability. Ar
This document discusses binary vulnerabilities and methods for identifying and exploiting them. It covers topics like stack overflows, heap overflows, integer overflows, and pointer vulnerabilities. It also discusses vulnerability metrics, identifiers, and tools that can be used for analysis like fuzzers, symbolic execution, and decompilers. Exploitation techniques like bypassing protections and transferring control are also mentioned.
This document discusses binary vulnerabilities and methods for finding and exploiting them. It covers different types of vulnerabilities like stack overflows, heap overflows, and integer overflows. It also discusses vulnerability metrics, identifiers, and tools that can be used to analyze binaries both statically and dynamically like fuzzers, symbolic execution, and taint analysis. Exploitation techniques like bypassing protections and ROP are also mentioned.
Ragel is a parser generator that compiles to various host languages including Ruby. It is useful for parsing protocols and data formats and provides faster parsing than regular expressions or full LALR parsers. Several Ruby projects like Mongrel and Hpricot use Ragel for tasks like HTTP request parsing and HTML parsing. When using Ragel with Ruby, it can be compiled to Ruby code directly, which is slow, or a C extension can be written for better performance. The C extension extracts the parsed data from Ragel and makes it available to Ruby.
This document describes a presentation by Martin Rønne of MR Logic on SynthWorks. It provides copyright information and notes that the material is from SynthWorks' Advanced VHDL Testbenches and Verification class. It also includes contact information for Jim Lewis, President of SynthWorks Design Inc.
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.
PHP is a server-side scripting language used to build dynamic web applications. It allows developers to add interactivity to websites. Some key points:
- PHP scripts are executed on the server-side and allow generation of dynamic web page content.
- It supports many databases and is compatible with popular web servers like Apache and IIS.
- Basic PHP syntax involves opening and closing <?php ?> tags to embed PHP code in HTML documents.
- Variables, conditional statements, loops and functions allow building complex scripts.
- PHP can retrieve and process form data submitted from HTML forms.
PHP is a server-side scripting language used for web development. It allows developers to embed PHP code into HTML files. PHP scripts are executed on the server and can interface with databases. It is free and open source. Some key PHP concepts covered include syntax, variables, data types, operators, conditional statements, loops, functions, and how to use PHP with HTML. PHP files typically use the .php extension and can be edited in text editors or IDEs.
This document provides a summary of the evolution of Oracle Database from 1977 to the present. It discusses key releases and features introduced over time, including supported platforms, database architecture, utilities, SQL features, PL/SQL, and the ability to integrate Java applications into the database.
or "Towards a Standard TAPI", presented at AUSOUG Connect Perth, November 2016. I've been using a combination of Table APIs and Transaction APIs to build complex but maintainable applications in Apex - something I encourage everyone to at least consider.
Building and Incredible Machine with Pipelines and Generators in PHP (IPC Ber...dantleech
Did you know that Generators and Pipelines can be combined in order to
solve software engineering problems?
Generators have been available to us in PHP for about 5 years, they are a very
powerful tool in a developers toolbox, they can be used to make your life
easier (e.g. as data providers in PHPUnit), to help process large amounts of
data, and even to enable co-operative multi-tasking.
Pipelines provide a way to compose complex tasks from stages.
In this talk we will briefly discuss a specific problem in PHPBench (a
benchmarking tool for PHP) which can be solved through the use of Generators
(and pipelines!). We will then explore both topics generally, before combining
them into an Incredible Machine in a live coding session.
Embed perl allows a C program to use Perl code and features by adding a Perl interpreter to the C program. It allows calling Perl subroutines from C, evaluating Perl statements, and performing Perl regular expressions. Using embed perl provides access to CPAN modules and Perl's powerful regex engine without needing PCRE. The basic steps are to initialize an interpreter, parse Perl code, run the code, and destruct the interpreter. Output can be captured by overriding Perl's filehandle layers to write to C variables instead of files. Embed perl is not difficult and provides a way to leverage Perl in C and C++ programs.
The document discusses assembly language and its relationship to computer architecture and programming. It covers the different views of computer design including the programmer's view through instruction set architecture and the logic designer's view through machine organization. It also summarizes how a high-level language program is converted into executable files through compilation, assembly, and linking.
Anatomy of a PHP Request ( UTOSC 2010 )Joseph Scott
This document provides an overview of the PHP request lifecycle, including how a PHP file is read, parsed, compiled, executed, and outputs. It discusses how PHP is handled by different web servers like Apache, Nginx, and FastCGI. It also covers topics like opcode caching with APC, profiling PHP performance with Xdebug, and analyzing PHP opcodes with Vulcan Logic Dumper.
10. វិទ្យាស្ថា នពហុបច្ចេកច្ទ្យសច្េត្តបាត្់ដំបង POLYTECHNICINSTITUTEOFBATTAMBANGPROVINCE
Developing web Application with PHP Prepare By: DY CHANDOEUN Page 10
5.6 Logical Operators>
Logical Operators
Operator Name Returns True if... Example Result
|| Or Left or right is true
true ||
false
True
Or Or Left or right is true
true ||
false
true
Xor Xor Left or right is true but not both
true xor
true
false
&& And Left and right are true
true &&
false
false
And And Left and right are true
true &&
false
false
! Not The single operand is not true ! true false
Logical operators bMElg operand eGayeTACatMél Boolean rYceFVIkareRbobeFobtMélTaMgenaH .
Or operator b¤( || ) pþl;tMél true RbsinebIoperand xageqVg b¤ xagsþaMNamYymantMél true .
]TahrN_ 1> true || false lT§plKW true .And operator b¤ ( && ) pþl;tMél true enAeBlEdl operand
TaMgBIrmantMél true .
]TahrN_2> true && false lT§plKWfalse .
]TahrN_3> ( $x > 2 ) && ( $x < 15 )
5.7 Increment/Decrement Operators
Increment/decrement operators eRbIedIm,IbegáIn b¤ bnßytMél rbs; variable EdlCa Integer
ehIyCaTUeTAeRbIedIm,Irab; Iteration rbs;loop .
$x = $x + 1; // $x is incremented.
$x += 1; // $x is incremented.
$x++; // $x is incremented
. $x = $x - 1; // $x is decremented.
$x--; // $x is decremented.
$x- = 1; // $x is decremented.
11. វិទ្យាស្ថា នពហុបច្ចេកច្ទ្យសច្េត្តបាត្់ដំបង POLYTECHNICINSTITUTEOFBATTAMBANGPROVINCE
Developing web Application with PHP Prepare By: DY CHANDOEUN Page 11
Operator Name Effect on $var Value of the Expression
$var++ Post-increment $var is incremented by 1
The previous value of
$var
++$var Pre-increment $var is incremented by 1
The new value of $var
(incremented by 1).
$var-- Post-decrement $var is decremented by 1
The previous value of
$var
--$var Pre-decrement $var is decremented by 1
The new value of $var
(decremented by 1).
]TahrN_
$num1 = 5;
$num2 = $num1++; // post-increment, $num2 RtUv)anpþl;nUvtMéledImrbs;$num1
print $num1; // lT§plEdlnwgRtUvbgðajKWtMélrbs; $num1 KW 6
print $num2; // lT§plEdlnwgRtUvbgðajKWCatMéledImrbs; $num1 KW 5
]TahrN_³
$num1 = 5;
$num2 = ++$num1; // pre-increment, $num2 RtUv)anpþl;nUvtMélfµIrbs; $num1
eTAeGay $num2 .
print $num1; // lT§plEdlnwgRtUvbgðajKWtMélrbs; $num1 KW 6
print $num2; // lT§plEdlnwgRtUvbgðajKWCatMélrbs; $num1 KW 6
6.Constants >
CaTUeTA Variables RtUv)aneKeRbIedIm,IpÞúknUvtMél BIeRBaHtMél nig RbePTrbs;vaGac
nwgRtUvpøas;bþÚr)anRKb;eBlevla . RbsinebIGñkcg;eFVIkarCamYytMélEdlminERbrRbYlenAkñúgkar RbtibtþikarkUdrbs;Gñk
GñkGaceRbIR)as;nUvconstant . PHP )anpþl;nUvdefine() function edIm,I
begáItnUv constant .
define("CONSTANT_NAME", 42); >