php中文数字转化成阿拉伯数字

 function cn2num($string){    if(is_numeric($string)){        return $string;    }    // '仟' => '千','佰' => '百','拾' => '十',    $string = str_replace('仟', '千', $string);    $string = str_replace('佰', '百', $string);    $string = str_replace('拾', '十', $string);    $num = 0;    $wan = explode('万', $string);    if (count($wan) > 1) {        $num += cn2num($wan[0]) * 10000;        $string = $wan[1];    }    $qian = explode('千', $string);    if (count($qian) > 1) {        $num += cn2num($qian[0]) * 1000;        $string = $qian[1];    }    $bai = explode('百', $string);    if (count($bai) > 1) {        $num += cn2num($bai[0]) * 100;        $string = $bai[1];    }    $shi = explode('十', $string);    if (count($shi) > 1) {        $num += cn2num($shi[0] ? $shi[0] : '一') * 10;        $string = $shi[1] ? $shi[1] : '零';    }    $ling = explode('零', $string);    if (count($ling) > 1) {        $string = $ling[1];    }    $d = array(        '一' => '1','二' => '2','三' => '3','四' => '4','五' => '5','六' => '6','七' => '7','八' => '8','九' => '9',        '壹' => '1','贰' => '2','叁' => '3','肆' => '4','伍' => '5','陆' => '6','柒' => '7','捌' => '8','玖' => '9',        '零' => 0, '0' => 0, 'O' => 0, 'o' => 0,        '两' => 2    );    return $num + @$d[$string];}