mb_strrpos

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

mb_strrpos — Find position of last occurrence of a string in a string

Beschreibung

mb_strrpos(
    string $haystack,
    string $needle,
    int $offset = 0,
    ?string $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.

Parameter-Liste

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: Der Parameter encoding legt die Zeichenkodierung fest. Wird er nicht übergeben, so wird die interne Zeichenkodierung genutzt.

Rückgabewerte

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

Changelog

Version	Beschreibung
8.0.0	`needle` akzeptiert nun eine leere Zeichenkette.
8.0.0	Passing the `encoding` as the third argument instead of an offset has been removed.
8.0.0	`encoding` ist nun nullable (akzeptiert den `null`-Wert).

Siehe auch

mb_strpos() - Find position of first occurrence of string in a string
mb_internal_encoding() - Set/Get internal character encoding
strrpos() - Findet die Position des letzten Vorkommens eines Teilstrings innerhalb einer Zeichenkette

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User Contributed Notes 2 notes

down

Anonymous ¶

19 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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Anonymous ¶

9 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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