(PHP 4, PHP 5, PHP 7, PHP 8)
strstr — Find the first occurrence of a string
$haystack, string $needle, bool $before_needle = false): string|false
Returns part of haystack string starting from and including the first
occurrence of needle to the end of
haystack.
Note:
This function is case-sensitive. For case-insensitive searches, use stristr().
Note:
If you only want to determine if a particular
needleoccurs withinhaystack, use the faster and less memory intensive function strpos() instead.
haystackThe input string.
needle
Prior to PHP 8.0.0, if needle is not a string, it is converted
to an integer and applied as the ordinal value of a character.
This behavior is deprecated as of PHP 7.3.0, and relying on it is highly
discouraged. Depending on the intended behavior, the
needle should either be explicitly cast to string,
or an explicit call to chr() should be performed.
before_needle
If true, strstr() returns
the part of the haystack before the first
occurrence of the needle (excluding the needle).
Returns the portion of string, or false if needle
is not found.
| Version | Description |
|---|---|
| 8.0.0 |
Passing an int as needle is no longer supported.
|
| 7.3.0 |
Passing an int as needle has been deprecated.
|
Example #1 strstr() example
<?php
$email = 'name@example.com';
$domain = strstr($email, '@');
echo $domain; // prints @example.com
$user = strstr($email, '@', true);
echo $user; // prints name
?>