Web студия "GrandView"

Description

int mb_strpos ( string haystack, string needle [, int offset [, string encoding]] )

mb_strpos() returns the numeric position of the first occurrence of needle in the haystack string. If needle is not found, it returns FALSE.

mb_strpos() performs multi-byte safe strpos() operation based on number of characters. needle position is counted from the beginning of the haystack. First character's position is 0. Second character position is 1, and so on.

If encoding is omitted, internal character encoding is used.

offset is search offset. If it is not specified, 0 is used.

encoding is character encoding name. If it is omitted, internal character encoding is used.

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mb_strpos

zangaru at hotmail dot com
05-Jul-2007 10:42


Hello,



Just replaced strpos() with mb_strpos() and now I am getting following error:



PHP Warning:  mb_strpos() [<a href='function.mb-strpos'>function.mb-strpos</a>]: Empty delimiter



PHP version: 5.2.3

OS: Win XP Prof

Web Server: IIS



I checked your bugs and mentioned that mb_string functions have been fixed as of 5.2.0 but it does not seem to be the case (Bug #39400).



My code:

==============================================



$charOut = mb_substr($tmpStr, $tmpKey[0], 1); 

$posOut = mb_strpos($charList, $charOut); 

if ($posOut !== FALSE) {

    // do something here

}



==============================================

stestagg at talk21 dot com
05-Aug-2006 05:12


sorry, my previous post had an error.  replace the 1000 with strlen($haystack) to handle strings longer than 1000 chars.



btw. This is an issue with the mbstring functions.  you can't specify the $encoding without specifying a $length, thus this reduces the functionality of mb_substr compared to substr

stestagg at talk21 dot com
04-Aug-2006 09:42


a sample mb_str_replace function:



function mb_str_replace($haystack, $search,$replace, $offset=0,$encoding='auto'){

    $len_sch=mb_strlen($search,$encoding);

    $len_rep=mb_strlen($replace,$encoding);

    

    while (($offset=mb_strpos($haystack,$search,$offset,$encoding))!==false){

        $haystack=mb_substr($haystack,0,$offset,$encoding)

            .$replace

            .mb_substr($haystack,$offset+$len_sch,1000,$encoding);

        $offset=$offset+$len_rep;

        if ($offset>mb_strlen($haystack,$encoding))break;

    }

    return $haystack;

}

stestagg at talk21 dot com
04-Aug-2006 09:39


It appears that the $offset value is a character count not a byte count.  (This may seem obvious but it isn't explicitly stated)

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