The PHP stristr of function of case insensitive string lookup

If the search succeeds, the rest of the string is returned (from the match point), or false if the string is not found.

Version support: PHP 3+

Grammar:
Stristr (string, find)

Description:
The string must be. Specifies the string to be searched.
Find a necessity. Specifies the characters to look for. If the parameter is a number, the character matching the ASCII value of the number is searched.

Tip:
This function is binary safe.
This function is case-insensitive. For case-sensitive searches, use STRSTR ().

Example:

Example 1

 
<?php 
echo stristr("Hello world!","WORLD"); 
?> 

Output:

World!

Example 2

 
<?php 
echo stristr("Hello world!",111); 
?> 

Output:

O world!