PHP stripos() Function

PHP stripos() Function

The stripos() function in PHP finds the position of the first occurrence of a substring in the specified string. It is a case-insensitive a binary-safe function.

The related functions are as follows:

• strripos() Function
• strpos() Function
• strrpos() Function

Syntax

stripos ( string $haystack , mixed $needle [, int $offset ] ) 

Parameter

haystack(required)- This parameter signifies the string to be unescaped.

needle(required)- This parameter represents a string of one or more characters. If it is not a string, it is converted to an integer and applied as the ordinal value of a character.

offset(optional)- This parameter specifies from where to begin the search in the string.

Return

This function returns the position of where the needle exists relative to the beginning of the haystack string or returns FALSE if the needle was not found.

Example 1

Output

String: Hello World! Hello my PHP!
The position of 'my' is 19 

Example 2

Output

String: This is an stripos() example!
The position of 'STRIPOS' is 11 

Example 3

Output

String: Hello World! Hello my PHP!
The position of 'my' is 19

Example 4

Output

PHP Warning:  stripos(): Offset not contained in string in /workspace/Main.php on line 8