stripos
(PHP 5)
stripos — Find the position of the first occurrence of a case-insensitive substring in a string
Description
$haystack
, string $needle
[, int $offset = 0
] )
Find the numeric position of the first occurrence of
needle in the haystack string.
Unlike the strpos(), stripos() is case-insensitive.
Parameters
-
haystack -
The string to search in.
-
needle -
Note that the
needlemay be a string of one or more characters.If
needleis not a string, it is converted to an integer and applied as the ordinal value of a character. -
offset -
If specified, search will start this number of characters counted from the beginning of the string. Unlike strrpos() and strripos(), the offset cannot be negative.
Return Values
Returns the position of where the needle exists relative to the beginnning of
the haystack string (independent of offset).
Also note that string positions start at 0, and not 1.
Returns FALSE if the needle was not found.
This function may
return Boolean FALSE, but may also return a non-Boolean value which
evaluates to FALSE. Please read the section on Booleans for more
information. Use the ===
operator for testing the return value of this
function.
Examples
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: This function is binary-safe.
See Also
- strpos() - Find the position of the first occurrence of a substring in a string
- strrpos() - Find the position of the last occurrence of a substring in a string
- strripos() - Find the position of the last occurrence of a case-insensitive substring in a string
- stristr() - Case-insensitive strstr
- substr() - Return part of a string
- str_ireplace() - Case-insensitive version of str_replace.
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