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run code in 300+ PHP versions simultaneously

@ 2013-10-25T12:37:09Z

<?php

function distance($vect1, $vect2) 
{
    if (!is_array($vect1) || !is_array($vect2)) {

        return NULL;
    }

    if (count($vect1) != count($vect2)) {

        return NULL;
    }

    for ($i=0; $i<count($vect1); $i++) {
        $c1 = $vect1[$i]; $c2 = $vect2[$i];
        $d = 0.0;
        if (!is_numeric($c1)) {
            trigger_error("Coordinate $i in vector 1 is not a number, using zero", 
                            E_USER_WARNING);
            $c1 = 0.0;
        }
        if (!is_numeric($c2)) {
            trigger_error("Coordinate $i in vector 2 is not a number, using zero", 
                            E_USER_WARNING);
            $c2 = 0.0;
        }
        $d += $c2*$c2 - $c1*$c1;
        return $d;
        echo sqrt($d);
    }
   return $d; 
}



// variabile non definita, genera un warning
$t = I_AM_NOT_DEFINED;

// definisce dei vettori
$a = array(2, 3, "foo");
$b = array(5.5, 4.3);
$c = array(1, 3);

// genera un errore utente
distance($c, $b) . "\n";

// un'altro errore utente
distance($b, "i am not an array") . "\n";

// genera un warning
 distance($a, $b) . "\n";

?>

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught Error: Undefined constant "I_AM_NOT_DEFINED" in /in/hMA5o:38 Stack trace: #0 {main} thrown in /in/hMA5o on line 38
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Warning: Use of undefined constant I_AM_NOT_DEFINED - assumed 'I_AM_NOT_DEFINED' (this will throw an Error in a future version of PHP) in /in/hMA5o on line 38
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25: Notice: Use of undefined constant I_AM_NOT_DEFINED - assumed 'I_AM_NOT_DEFINED' in /in/hMA5o on line 38

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