stripos
Find the position of the first occurrence of a case-insensitive substring in a string
Description
mixed stripos
( string $haystack
, string $needle
[, int $offset = 0
] )
Unlike the strpos, stripos is
case-insensitive.
Parameters
-
haystack
-
The string to search in.
-
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
-
If specified, search will start this number of characters counted from
the beginning of the string. If the offset is negative, the search will start
this number of characters counted from the end of the string.
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.
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 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
- mb_stripos
- strpos
- strrpos
- strripos
- stristr
- substr
- str_ireplace