The stristr Function
The stristr function searches for the first occurrence of a substring in a string case-insensitively and returns the part of the string from that occurrence to the end. If the substring is not found, it returns false.
Syntax
stristr(string $haystack, mixed $needle, bool $before_needle = false): string|false
Example
Case-insensitive substring search:
<?php
$email = 'USER@EXAMPLE.com';
echo stristr($email, 'e'); // Finds the first 'E'
?>
Code execution result:
"ER@EXAMPLE.com"
Example
Using the third parameter to get the part before the found substring:
<?php
$string = 'Hello World';
echo stristr($string, 'w', true); // Returns the part before 'W'
?>
Code execution result:
"Hello "
Example
Checking for the presence of a substring:
<?php
$res = stristr('Hello World', 'xyz');
var_dump($res);
?>
Code execution result:
false
