php 获取字符串中所有的包括小数的数字存成数组

查找字符中的所有数字并存成list

         $str=trim("whl12.32b.la.5687");
         if(empty($str)){return "";}
         $temp=array("1","2","3","4","5","6","7","8","9","0",".");
         $mumList = array();
         $result="";

         for($i=0;$i<strlen($str);$i++){
             if(in_array($str[$i],$temp)){

                if(is_numeric($str[$i])){
                    $result.=$str[$i];
                }
                if($str[$i]=="." && is_numeric($str[$i-1])&&is_numeric($str[$i-1])){
                    $result.=$str[$i];
                }
                 if(($i+1)==strlen($str)){
                    $mumList[] = $result;
                    $result = "";
                 }
             }else{
                $mumList[] = $result;
                $result = "";
             }
         }
         $mumList = array_values(array_filter($mumList));
        dump($mumList);

ccahz

$str=trim("whl12.3a45tdsf2b.la.5.687");
if(empty($str)){return "";}
$temp=array("1","2","3","4","5","6","7","8","9","0",".");
$mumList = array();
$result="";
$maxNum = 0;
for($i=0;$i<strlen($str);$i++){
    if(in_array($str[$i],$temp)){

    if(is_numeric($str[$i])){
    $result.=$str[$i];
    }
    if($str[$i]=="." && is_numeric($str[$i-1])&&is_numeric($str[$i-1])){
    $result.=$str[$i];
    }
        if(($i+1)==strlen($str)){

            if($maxNum==0||$maxNum < $result){
                $maxNum = $result;
            }

        $mumList[] = $result;
        $result = "";
        }
    }else{
        if($maxNum==0||$maxNum < $result){
            $maxNum = $result;
        }
    $mumList[] = $result;
    $result = "";
    }
}
$mumList = array_values(array_filter($mumList));
dump(intval($maxNum));
dump($mumList);
exit;

    /**
     * 根据指定字段排序二维数组，保留原有键值(降序)
     * @param $arr @输入二维数组
     * @param $var @要排序的字段名
     * return array
     */
    private function arrSort($arr, $var,$sort){
        $tmp=array();
        $rst=array();
        foreach($arr as $key=>$trim){
            $tmp[$key] = $trim[$var];
        }
        if($sort=="arsort"){
            //arsort() 函数用于对数组单元从高到低进行排序并保持索引关系。
            // dump("arsort");
            arsort($tmp);
        }else{
            //asort() 函数用于对数组单元从低到高进行排序并保持索引关系。
            // dump("asort");
            asort($tmp);
        }
        $i=0;
        foreach($tmp as $key1=>$trim1){
            $rst[$i] = $arr[$key1];
            $i++;
        }
        return $rst;
    }