mb_strrpos

(PHP 4 >= 4.0.6, PHP 5)

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

Descripción

int mb_strrpos ( string $haystack , string $needle [, int $offset = 0 [, string $encoding ]] )

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.

Parámetros

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: El parámetro encoding es la codificación de caracteres. Si es omitido, será usado el valor de la codificación de caracteres interna.

Valores devueltos

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

Historial de cambios

Versión	Descripción
5.2.0	Added the optional parameter `offset`.

Notas

Note: The encoding parameter was moved from the third position to the fourth in PHP 5.2.0. For backward compatibility, encoding can be specified as the third parameter, but doing so is deprecated and will be removed in the future.

Note:
La codificación interna o la codificación especificada por mb_regex_encoding() será usada en esta función.

Ver también

mb_strpos() - Find position of first occurrence of string in a string
mb_internal_encoding() - Set/Get internal character encoding
strrpos() - Encuentra la posición de la última aparición de un substring en un string

add a note User Contributed Notes mb_strrpos

28-Nov-2005 02:32


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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