stripos
(PHP 5)
stripos — Find position of first occurrence of a case-insensitive string
Description
int stripos
( string $haystack
, string $needle
[, int $offset
] )
Returns the numeric position of the first occurrence of needle in the haystack string.
Unlike strpos(), stripos() is case-insensitive.
Parameters
- haystack
-
- needle
-
Note that the needle may be a string of one or more characters.
If needle is not a string, it is converted to an integer and applied as the ordinal value of a character.
- offset
-
The optional offset parameter allows you to specify which character in haystack to start searching. The position returned is still relative to the beginning of haystack .
Return Values
If needle is not found, stripos() will return boolean FALSE.
範例
Example#1 stripos() examples
<?php
$findme = 'a';
$mystring1 = 'xyz';
$mystring2 = 'ABC';
$pos1 = stripos($mystring1, $findme);
$pos2 = stripos($mystring2, $findme);
// Nope, 'a' is certainly not in 'xyz'
if ($pos1 === false) {
echo "The string '$findme' was not found in the string '$mystring1'";
}
// Note our use of ===. Simply == would not work as expected
// because the position of 'a' is the 0th (first) character.
if ($pos2 !== false) {
echo "We found '$findme' in '$mystring2' at position $pos2";
}
?>
Notes
Note: 這個函數可安全的使用於二進位。