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mb_strrpos

Description

The mb_strrpos of Multibyte String for PHP finds the position of the last occurrence of a string within a string.

Syntax

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

Parameters

haystack

The string being checked, for the last occurrence of needle

needle

The string to find in haystack.

offset

May be specified to begin searching an arbitrary number of characters into the string. Negative values will stop searching at an arbitrary point prior to the end of the string.

encoding

The encoding parameter is the character encoding. If it is omitted or null, the internal character encoding value will be 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';

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

echo $return;

13

2 · offset · negative

<?

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

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

echo $return;

6

3 · offset · non-negative

<?

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

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

echo $return;

13

4 · encoding

<?

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

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

echo $return;

13