stristr
(PHP 3 >= 3.0.6, PHP 4, PHP 5)
stristr --
Case-insensitive
strstr()
Description
string
stristr ( string haystack, string needle )
Returns all of haystack from the first
occurrence of needle to the end.
needle and haystack
are examined in a case-insensitive manner.
If needle is not found, returns FALSE.
If needle is not a string, it is converted
to an integer and applied as the ordinal value of a character.
例子 1. stristr() example
<?php
$email = 'USER@EXAMPLE.com';
echo stristr($email, 'e');
// outputs ER@EXAMPLE.com
?>
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例子 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
?>
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例子 3. Using a non "string" needle
<?php
$string = 'APPLE';
echo stristr($string, 97); // 97 = lowercase a
// outputs: APPLE
?>
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See also
strstr(),
strrchr(),
substr(), and
ereg().