strripos
(PHP 5, PHP 7, PHP 8)
strripos — Find the position of the last occurrence of a case-insensitive substring in a string
Description
$haystack, string $needle, int $offset = 0): int|false
Find the numeric position of the last occurrence of
needle in the haystack string.
Unlike the strrpos(), strripos() is case-insensitive.
Parameters
-
haystack -
The string to search in.
-
needle -
Prior to PHP 8.0.0, 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. -
offset -
If zero or positive, the search is performed left to right skipping the first
offsetbytes of thehaystack.If negative, the search is performed right to left skipping the last
offsetbytes of thehaystackand searching for the first occurrence ofneedle.Note:
This is effectively looking for the last occurrence of
needlebefore the lastoffsetbytes.
Return Values
Returns the position where the needle exists relative to the beginnning of
the haystack string (independent of search direction
or offset).
Note: 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.
Changelog
| Version | Description |
|---|---|
| 8.0.0 |
Passing an int as needle is no longer supported.
|
| 7.3.0 |
Passing an int as needle has been deprecated.
|
Examples
Example #1 A simple strripos() example
<?php
$haystack = 'ababcd';
$needle = 'aB';
$pos = strripos($haystack, $needle);
if ($pos === false) {
echo "Sorry, we did not find ($needle) in ($haystack)";
} else {
echo "Congratulations!\n";
echo "We found the last ($needle) in ($haystack) at position ($pos)";
}
?>
The above example will output:
Congratulations! We found the last (aB) in (ababcd) at position (2)
See Also
- strpos() - Find the position of the first occurrence of a substring in a string
- stripos() - Find the position of the first occurrence of a case-insensitive substring in a string
- strrpos() - Find the position of the last occurrence of a substring in a string
- strrchr() - Find the last occurrence of a character in a string
- stristr() - Case-insensitive strstr
- substr() - Return part of a string
