配列の要素が空白でないかどうかを判断する PHP のサンプルコード

<?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("There are elements of the array with spaces");
} else {
    echo("None of the array elements are spaces");
}
? >

<?php 
$arr = array( 
1=>"11", 
2=>"22", 
3=>"33", 
4=>"" 
); 
print_r(count(array_filter($arr)))); 
? >