與多維數組匹配形式的數據

Question

我應該使用什麼驗證碼，當通過

$ _GET [「羣」]，

$ _GET [「章」接收到的所有數據，返回FALSE ]

$ _GET [ '文章']

不與$規律[$ MATCH組] [$ chapter] [$ article]多維數組已經設置？

我問，因爲我打算一次回顯一篇文章中的$法則多維數組，如果這樣的數組構造不存在，則返回錯誤。

非常感謝！

<?php 

session_start(); 
$laws = array(
    "group1" => array(
     "1" => array(
      "1" => "This is article (1) in chapter (1) of (group1)", 
      "2" => "This is article (2) in chapter (1) of (group1)", 
      "3" => "This is article (3) in chapter (1) of (group1)", 
     ), 
     "2" => array(
      "1" => "This is article (1) in chapter (2) of (group1)", 
      "2" => "This is article (2) in chapter (2) of (group1)", 
      "3" => "This is article (3) in chapter (2) of (group1)", 
     ), 
    ), 
    "group2" => array(
     "1" => array(
      "1" => "This is article (1) in chapter (1) of (group2)", 
      "2" => "This is article (2) in chapter (1) of (group2)", 
      "3" => "This is article (3) in chapter (1) of (group2)", 
     ), 
     "2" => array(
      "1" => "This is article (1) in chapter (2) of (group2)", 
      "2" => "This is article (2) in chapter (2) of (group2)", 
      "3" => "This is article (3) in chapter (2) of (group2)", 
     ), 
    ) 
); 


$_SESSION['group'] = $_GET['group']; 
$_SESSION['chapter'] = $_GET['chapter']; 
$_SESSION['article'] = $_GET['article']; 

$group = $_SESSION['group']; 
$chapter = $_SESSION['chapter']; 
$article = $_SESSION['article']; 



// Echo Article from $laws multidimensional Array 

echo $laws[$group][$chapter][$article]; 
?> 

Answer 1

如果你想返回FALSE時，所有接收到的數據不匹配：

$grp= $_GET['group']; 
$chap = $_GET['chapter']; 
$art = $_GET['article']; 
return isset($laws[$grp]) || isset($laws[$grp][$chap]) || isset($laws[$grp][$chap][$art]); 

但我認爲你想返回FALSE當任何接收到的數據的不匹配，則應使用方法：

return isset($laws[$grp][$chap][$art]); 

Answer 2

如果你只是想檢查，如果在給定的組和章節使用isset存在給定的文章（）http://php.net/manual/en/function.isset.php：

$article_exists = isset($laws[$group][$chapter][$article];