strripos
Find the position of the last occurrence of a case-insensitive substring in a string
Description
intfalse strripos(string $haystack, string $needle, int $offset = 0)
Unlike the strrpos, strripos is
case-insensitive.
Parameters
-
haystack
-
The string to search in.
-
needle
-
The string to search for.
Prior to PHP 8.0.0, if needle is 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, the
needle should 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 offset bytes of the
haystack.
If negative, the search is performed right to left skipping the
last offset bytes of the
haystack and searching for the first occurrence
of needle.
Note:
This is effectively looking for the last occurrence of
needle before the last
offset bytes.
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.
WarningThis 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 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
- stripos
- strrpos
- strrchr
- stristr
- substr