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

Beschreibung

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.

Parameter-Liste

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.

Rückgabewerte

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

Changelog

Version	Beschreibung
8.0.0	`needle` akzeptiert nun eine leere Zeichenkette.
8.0.0	`encoding` ist nun nullable (akzeptiert den `null`-Wert).

Siehe auch

strripos() - Findet das letzte Vorkommen der gesuchten Zeichenkette in einem String, unabhängig von Groß- und Kleinschreibung
strrpos() - Findet die Position des letzten Vorkommens eines Teilstrings innerhalb einer Zeichenkette
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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