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Editorial Team
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Asked: 2026-06-12T02:41:05+00:00

My multi-dimensional array is working. But I cannot seem to use explode or in_array

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My multi-dimensional array is working. But I cannot seem to use explode or in_array to limit the array when calling via $_GET

<?
$shop = array(
array("red", "black", "blue", "green"),
array("orange"),
array("orange", "black"),
array("pink", "yellow")
);

foreach ($shop as $rowNumber => $row)
{
    echo "<li><b>The row number $rowNumber</b>";
        echo "<ul>";
        foreach ($row as $col) {
            if (in_array($col, explode(' and ', $_GET['filter']))){
                echo "<li>".$col."</li>";
            }
        }
        echo "</ul>";
    echo "</li>";
}

?>

If I run the script with $_GET["filter"]=="black" it displays all items – it should only display two, example this is wrong: the other rows should not appear:

enter image description here

should be this instead

enter image description here

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1 Answer

  1. Editorial Team

    Updated

    Solution 1

       <?
    
    $shop = array(
    array("1", "red", "black", "blue and green"),
    array("2", "orange"),
    array("3", "pink", "yellow", "blue and green")
    );
    
    for ($row = 0; $row < count($shop); $row++)    
     {

            $lis = "";
            for ($col = 0; $col < count($shop[$row]); $col++)
                {
                     if (in_array($shop[$row][$col], explode(' and ', $_GET['filter'])) 
                        || empty($_GET['filter'])){
                        $lis .= "<li>".$col."</li>";
                     }
                }
           if($lis != "") {
             echo "<li><b>The row number $row</b>";
             echo "<ul>";
             echo $lis;
             echo "</ul>";
             echo "</li>";
         }
    }
    
    ?>

    Solution 2

    <?

$shop = array(
array("1", "red", "black", "blue and green"),
array("2", "orange"),
array("3", "pink", "yellow", "blue and green")
);

for ($row = 0; $row < count($shop); $row++)    
{
    $lis = "";
    
    for ($col = 0; $col < count($shop[$row]); $col++)
    {
            if (in_array($shop[$row][$col], explode(' and ', $_GET['filter']))){
                $lis .= "<li>".$col."</li>";
            }
    }
    
    if($lis=="") {
        
            echo "$row";
        
    } else {
        
            echo $lis;
        
    }
}

?>
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