Description
Returns all of haystack starting from and including the first
occurrence of needle to the end.
Parameters
-
haystack -
The string to search in
-
needle -
If
needleis not a string, it is converted to an integer and applied as the ordinal value of a character. -
before_needle -
If
TRUE, stristr() returns the part of thehaystackbefore the first occurrence of theneedle(excluding needle).
needle and haystack
are examined in a case-insensitive manner.
Return Values
Returns the matched substring. If needle is not
found, returns FALSE.
Changelog
| Version | Description |
|---|---|
| 5.3.0 |
Added the optional parameter before_needle.
|
| 4.3.0 | stristr() was made binary safe. |
Examples
Example #1 stristr() example
<?php
$email = 'USER@EXAMPLE.com';
echo stristr($email, 'e'); // outputs ER@EXAMPLE.com
echo stristr($email, 'e', true); // As of PHP 5.3.0, outputs US
?>
Example #2 Testing if a string is found or not
<?php
$string = 'Hello World!';
if(stristr($string, 'earth') === FALSE) {
echo '"earth" not found in string';
}
// outputs: "earth" not found in string
?>
Example #3 Using a non "string" needle
<?php
$string = 'APPLE';
echo stristr($string, 97); // 97 = lowercase a
// outputs: APPLE
?>
Notes
Note: This function is binary-safe.
See Also
- strstr() - Find the first occurrence of a string
- strrchr() - Find the last occurrence of a character in a string
- stripos() - Find the position of the first occurrence of a case-insensitive substring in a string
- strpbrk() - Search a string for any of a set of characters
- preg_match() - Perform a regular expression match
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