stripos
Description
The stripos of String for PHP find the position of the first occurrence of a case-insensitive substring in a string.
Syntax
stripos(
string $haystack,
string $needle,
int $offset = 0
): int|falseParameters
haystack
The string to search in.
needle
The string to search for.
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
Returns the position of where the needle exists relative to the beginning 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.
WARNING: This function may return Boolean false, but may also return a non-Boolean value which evaluates to false. Use the === operator for testing the return value of this function.
Examples
1 · haystack needle
<? $haystack = 'CASEcase'; $needle = 's'; $return = stripos($haystack, $needle); echo $return; ?>
2
2 · offset · negative
<? $haystack = 'CASEcase'; $needle = 's'; $offset = -4; $return = stripos($haystack, $needle, $offset); echo $return; ?>
6
3 · offset · non-negative
<? $haystack = 'CASEcase'; $needle = 's'; $offset = 4; $return = stripos($haystack, $needle, $offset); echo $return; ?>
6
4 · return
<?
// use identity operator (===) instead of comparison operator (==) to test return
$haystack = 'abc';
$needle = 'a';
$return = stripos($haystack, $needle);
if($return === false)
{
echo "not found";
}
else
{
echo "found";
}
?>found
Links
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