Question

What validation code should I use to return a FALSE when ALL the data received via

$_GET[‘group’],

$_GET[‘chapter’]

$_GET[‘article’]

does NOT MATCH with the $laws[$group][$chapter][$article] Multidimensional array already set?

I ask because I intend to echo back one article at a time in $laws multidimensional array, for which if such an array construction does not exist, an error returns.

Thanks a lot!

    <?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

If you want to return FALSE when ALL the data received does not match:

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

But I think you want to return FALSE when ANY of the data received does not match, you should then use:

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