mb_strripos

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

mb_strripos — Finds position of last occurrence of a string within another, case insensitive

Descrizione

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

mb_strripos() performs multi-byte safe strripos() operation based on number of characters. needle position is counted from the beginning of haystack. First character's position is 0. Second character position is 1. Unlike mb_strrpos(), mb_strripos() is case-insensitive.

Elenco dei parametri

haystack: The string from which to get the position of the last occurrence of needle
needle: The string to find in haystack
offset: The position in haystack to start searching
encoding: Character encoding name to use. If it is omitted, internal character encoding is used.

Valori restituiti

Return the numeric position of the last occurrence of needle in the haystack string, or false if needle is not found.

Log delle modifiche

Versione	Descrizione
8.0.0	`needle` now accepts an empty string.
8.0.0	`encoding` is nullable now.

Vedere anche:

strripos() - Trova la posizione dell'ultima occorrenza di una stringa in un'altra indipendentemente dalle lettere minuscole/maiusole
strrpos() - Trova la posizione dell'ultima occorrenza di un carattere in una stringa
mb_strrpos() - Find position of last occurrence of a string in a string

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User Contributed Notes 2 notes

down

easai ¶

14 years ago

Here are Java like startsWith/endsWith implementations in PHP.



<?php

    function startsWith($haystack,$needle)

    {

      $res=FALSE;

      if(mb_strripos($haystack,$needle,0,"utf-8")==0)

         $res= TRUE;

      return $res;

    }



    function endsWith($haystack,$needle)

    {

      $res=FALSE;

      $len=mb_strlen($haystack);

      $pos=$len-mb_strlen($needle);

      if(mb_strripos($haystack,$needle,0,"utf-8")==$pos)

         $res= TRUE;

      return $res;

    }

?>

down

-1

ivrokrambler at gmail dot com ¶

7 years ago

<?php
function backStrpos($str, $needle, $offset){
    $needler = backStr($needle);
    $strr = backStr($str);
    $offsetr = strlen($str) - 1 - $offset;
    $posr = mb_stripos($strr, $needler, $offsetr);
    return strlen($str) - 1 - $posr - strlen($needle);
}
function backStr($str){
    $str = str_replace(array('<', '>'), array('>', '<'), $str);
    return strrev($str);
}

function backStrpos($str, $needle, $offset){
    $needler = backStr($needle);
    $strr = backStr($str);
    $offsetr = strlen($str) - 1 - $offset;
    $posr = mb_stripos($strr, $needler, $offsetr);
    return strlen($str) - 1 - $posr - strlen($needle);
}
function backStr($str){
    $str = str_replace(array('<', '>'), array('>', '<'), $str);
    return strrev($str);
}

$test = '<table><TR>TEXT</TR><TR>TEST</TR></table>';
$pos = mb_stripos($test, 'TEST', 0);
var_dump($pos);
var_dump(backStrpos($test, '<tr', $pos));
var_dump(backStrpos($test, '<tr', backStrpos($test, '<tr', $pos)));

------->
int(24)
int(19)
int(6)

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