php判断数组元素不为空格的方法

<?php

header("Content-type:text/html;charset=utf-8");

$arr = array(10,"php中文网",20," ","php教程");

$i=0;

foreach ($arr as $value) {

    if($value!=" "){

        $i++;

    }else{

        $i=0;

        break;

    }

}

if ($i==0) {

    echo("数组中有元素为空格");

} else {

    echo("数组元素都不为空格");

}

?>