Untitled

<!DOCTYPE html>
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<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
        <?php
        $a = array(
            'a',
            'b',
            10 => 'c',
            0 => 'd',
            'caca'
        );
        foreach ($a as $clau => $valor) {
            echo "$clau";
            echo "$valor<br>";
        }
            echo count($a);
            echo "<br>";
        ?>
    </body>
</html>