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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. This behavior is deprecated as of PHP 7.3.0, and relying on it is highly discouraged. Depending on the intended behavior, theneedleshould either be explicitly cast to string, or an explicit call to chr() should be performed. -
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.
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
?>
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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