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

Опис

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.

Параметри

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.

Значення, що повертаються

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

Журнал змін

Версія	Опис
8.0.0	`needle` тепер може бути порожнім рядком.
8.0.0	`encoding` тепер може бути `null`.

Прогляньте також

strripos() - Find the position of the last occurrence of a case-insensitive substring in a string
strrpos() - Find the position of the last occurrence of a substring in a string
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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