This presentation tells us about some of the built-in functions of PHP we(programmers) use for making software or web applications etc.

1. PHP PRESENTATION
FAMOUS BUILT IN FUNCTIONS

2. CONTENT

3. INTRODUCTION
 FUNCTION: A function is a set of code, that takes a finite
number of input and optionally returns a value.
 BUILT IN FUNCTION: A function that is built into
an application and can be accessed by end-users.

4. BUILT IN FUNCTION in PHP
 Built in functions are functions that exist in PHP
installation package.
 These built in functions are what make PHP a very
efficient and productive scripting language.
 There are more than 1,000 inbuilt functions into the
standard PHP distribution. Apart from these, we can define
own functions according to the requirements.
 The built in functions can be classified into many
categories. Below is the list of the categories.

5. CATAGORIES
 Arrays
 Arithmetic
 File operations
 String

6. ARRAYS
 sort()
 rsort()
 count()
 print_r()
 array_push()
 in_array()

7. SORT()
 This built in function sorts the array in ascending order.
 By default the sorting behavior will reorganize an array alphabetically or
numerically.
 SYNTAX
 Sort($array, $sort_flags)
 Where:
 $array – the array in which you wish to sort
 $sort_flags - (optional) modifies the sorting behavior.

10. RSORT()

13. COUNT()

16. PRINT_R()

19. ARRAY_PUSH()

22. IN_ARRAY()

25. STRING
 Strlen()
 Str_replace()
 Strtolower()
 Strtoupper()

26. STRLEN()

29. STR_REPLACE()

32. STRTOLOWER()

35. STRTOUPPER()

38. ARITHMETIC
 Max()
 Min()
 Round()
 Sqrt()
 Rand()

39. MAX()

42. MIN()

45. ROUND()

48. SQRT()

51. RAND()

54. FILE OPERATIONS
 Copy()
 File_exist()
 File_get_content()
 Filesize()

55. COPY()

61. FILE_EXIST()

64. FILE_GET_CONTENT()

67. FILESIZE()

70. CONCLUSION

71. THANK YOU