對於每一個，如果任何空：沒有空格

Question

我有foreach循環工作。如果條件返回空，它應該是echo的東西。但是我收到了相反的效果。我試圖確保POST實際上包含數據，而不僅僅是whitespaces。以下是我迄今爲止：

<?php 
    $transponame = $_POST['transponame']; 
    $transpoid = $_POST['transpoid']; 

    foreach($transponame as $key => $n) { 
     $name = mysql_real_escape_string($name); 
     $name = htmlentities($name, ENT_QUOTES); 
     $n = mysql_real_escape_string($n); 
     $n = htmlentities($n, ENT_QUOTES); 
     $transpoid[$key] = htmlentities(strip_tags($transpoid[$key]),ENT_QUOTES); 
     if (!empty($n) && !empty($transpoid[$key])) { 
      echo "its empty"; 
     } 

    } 
?> 

Answer 1

變量，white space不是空的。所以你必須trim的價值。

<?php 
$transponame = $_POST['transponame']; 
$transpoid = $_POST['transpoid']; 

foreach($transponame as $key => $n) { 
    $name = mysql_real_escape_string($name); 
    $name = htmlentities($name, ENT_QUOTES); 
    $n = mysql_real_escape_string($n); 
    $n = htmlentities($n, ENT_QUOTES); 
    $transpoid[$key] = htmlentities(strip_tags($transpoid[$key]),ENT_QUOTES); 
if (empty(trim($n)) || empty(trim($transpoid[$key]))) { 
echo "its empty"; 
}; 

} ?>