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

Descrição

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.

Parâmetros

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: O parâmetro encoding é a codificação de caracteres. Se for omitido ou null, o valor da codificação de caracteres interna será usado.

Valor Retornado

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

Changelog

Versão	Descrição
8.0.0	O parâmetro `needle` agora aceita uma string vazia.
8.0.0	Passing the `encoding` as the third argument instead of an offset has been removed.
8.0.0	O parâmetro `encoding` agora pode ser nulo.

Veja Também

mb_strpos() - Find position of first occurrence of string in a string
mb_internal_encoding() - Set/Get internal character encoding
strrpos() - Encontra a posição da última ocorrência de um caractere em uma string

＋add a note

User Contributed Notes 2 notes

down

Anonymous ¶

17 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.

down

-2

Anonymous ¶

8 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)
?>

＋add a note