PHP: strrev - Manual

Description

string strrev ( string string )

Возвращает строку string, в которой порядок символов изменен на обратный.
Пример 1. Пример использования strrev()

<?php echo strrev("Hello world!"); // выводит "!dlrow olleH" ?>

strrev

carmel.alex at gmail.com
28-Feb-2006 12:54


This function support utf-8 encoding



function utf8_strrev($str){

    preg_match_all('/./us', $str, $ar);

    return join('',array_reverse($ar[0]));

}

tex at i18nguy dot com
22-Aug-2005 09:36


Just a correction to the previous commenter. In ISO 8859-15, the Euro is 0xA4 (164 decimal). It is a 1 byte character.

MagicalTux at FF dot st
12-May-2005 06:20


I will make Screend at hf dot webex dot com's comment more clear and understandable.



strrev only works for singlebyte character-sets. Multibytes charactersets are not compatibles with strrev.



US-ASCII and ISO-8859-1 are compatible with strrev, however BIG5, SJIS, UTF-8 aren't.



Despite what you can think, ISO-8859-15 *is* multibyte (the euro symbol - � - is coded on two bytes).



There's no mb_strrev function in PHP, so you can't strrev() a multibyte string. Try to convert it to something else with iconv() if it can be represented in a singlebyte character set.

avarab at gmail dot com
07-May-2005 12:53


strrev() can be very useful in cases where it makes more sense to do something from the end of a string rather than the beginning (well duh!) such as apply certain regular expressions. Here's a small function to add commas to numbers that works in such a way.



<?php

echo commafy("1500000.1254"); // prints 1,500,000.1254



function commafy($_) {

        return strrev( (string)preg_replace( '/(\d{3})(?=\d)(?!\d*\.)/', '$1,' , strrev( $_ ) ) );

}

?>



I originally wrote it in Perl, does it show? ;=)

Screend at hf dot webex dot com
30-Mar-2004 08:17


this function can only reverse the 1-byte words,like english,it seems,using

<?php

$str=strrev("����");

echo $str;

?>

do not get a right result.

but,you can change 2-bytes characters into a ASCLL,the converse it.