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mb_strripos

Description

The mb_strripos of Multibyte String for PHP finds the position of the last occurrence of a string within a string, case insensitive.

Syntax

mb_strripos(
    string $haystack,
    string $needle,
    int $offset = 0,
    ?string $encoding = null
): int|false

Parameters

haystack

The string from which to get the position of the last occurrence of needle

needle

The string to find in haystack

offset

The position in haystack to start searching

encoding

Character encoding name to use. If it is omitted, internal character encoding is used.

Return

Returns the numeric position of the last occurrence of needle in the haystack string, or false if needle is not found.

Examples

1 · haystack needle

<?

$haystack = 'string🐘string🐘string';
$needle = '🐘STRING';

$return = mb_strripos($haystack, $needle);

echo $return;

13

2 · offset · negative

<?

$haystack = 'string🐘string🐘string';
$needle = '🐘STRING';
$offset = -10;

$return = mb_strripos($haystack, $needle, $offset);

echo $return;

6

3 · offset · non-negative

<?

$haystack = 'string🐘string🐘string';
$needle = '🐘STRING';
$offset = 10;

$return = mb_strripos($haystack, $needle, $offset);

echo $return;

13

4 · encoding

<?

$haystack = 'string🐘string🐘string';
$needle = '🐘STRING';
$offset = 10;
$encoding = 'UTF-8';

$return = mb_strripos($haystack, $needle, $offset, $encoding);

echo $return;

13