mb_strrpos

(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

mb_strrposFind position of last occurrence of a string in a string

Description

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

Performs a multibyte safe strrpos() operation based on the number of characters. needle position is counted from the beginning of haystack. First character's position is 0. Second character position is 1.

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 Values

Returns the numeric position of the last occurrence of needle in the haystack string. If needle is not found, it returns false.

Changelog

Version Description
8.0.0 Passing the encoding as the third argument instead of an offset has been removed.
8.0.0 encoding is nullable now.

See Also

  • mb_strpos() - Find position of first occurrence of string in a string
  • mb_internal_encoding() - Set/Get internal character encoding
  • strrpos() - Find the position of the last occurrence of a substring in a string

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User Contributed Notes 2 notes

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2
Anonymous
15 years ago
mb_strrpos throws a warning if $haystack is empty.
strrpos simply returns FALSE.

This is something to be wary of if overloading the mb functions.
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0
Anonymous
6 years ago
"Negative values will stop searching at an arbitrary point prior to the end of the string. " ist misleading.
The needle may not fully part of searchrange, defined by a negative offset.
A negative offsets marks the last byte, where a search could start.
<?php
$test
= "Hallo, Herr Gött";
var_dump(strlen($test));                       // int(17)
var_dump(mb_strrpos($test,'ött',13));  // int(13)
var_dump(mb_strrpos($test,'ött',-4)); // int(13) 17-4 = 13
var_dump(mb_strrpos($test,'ött',-5)); // bool(false)
?>
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