Online PHP editor | output for GoZaF

@ 2019-05-03T10:19:24Z

<?php
function mathematical_zeros_after_dot($float) {
    $float = abs($float);  // remove any signs
    $float -= (int)$float;  // remove whole numbers from float
    if ($float == 0) {
        return "Rendered as 0";
    }
    $max = 20;
    for ($x = 0; $x < $max; ++$x) {
        $float *= 10;
        if ($float >= 1) {
            return $x;
        }
    }
    return "$max {exceeded}";
    
}
$floats = [
    25.000000000022,         // 10
    0.0000062,               // 5
    0.020320,                // 1
    .505000,                 // 0
    0,                       // 0
    .000507,                 // 3
    -.002009,                // 2
    1000,                    // 0
    0.00,                    // 0
    1                        // 0
    -1.0000000000004000004,  // 12
    981.0000000000000000000004000004  // 21
];
foreach ($floats as $float) {
    echo "(Math) {$float} has " , mathematical_zeros_after_dot($float) , " zero(s)\n";
    echo "Barmar {$float} has " , strspn($float, "0", strpos($float, ".")+1) , " zero(s)\n";
    echo "(PMA) {$float} has " , preg_match_all('~(?:\.|\G(?!^))0~', $float) , " zero(s)\n";
    echo "(PA) {$float} has " , (preg_match('~\.\K0+~', $float, $match) ? strlen($match[0]) : 0) , " zero(s)\n";
    
}

Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7: (Math) 25.000000000022 has 10 zero(s) Barmar 25.000000000022 has 10 zero(s) (PMA) 25.000000000022 has 10 zero(s) (PA) 25.000000000022 has 10 zero(s) (Math) 6.2E-6 has 5 zero(s) Barmar 6.2E-6 has 0 zero(s) (PMA) 6.2E-6 has 0 zero(s) (PA) 6.2E-6 has 0 zero(s) (Math) 0.02032 has 1 zero(s) Barmar 0.02032 has 1 zero(s) (PMA) 0.02032 has 1 zero(s) (PA) 0.02032 has 1 zero(s) (Math) 0.505 has 0 zero(s) Barmar 0.505 has 0 zero(s) (PMA) 0.505 has 0 zero(s) (PA) 0.505 has 0 zero(s) (Math) 0 has Rendered as 0 zero(s) Barmar 0 has 0 zero(s) (PMA) 0 has 0 zero(s) (PA) 0 has 0 zero(s) (Math) 0.000507 has 3 zero(s) Barmar 0.000507 has 3 zero(s) (PMA) 0.000507 has 3 zero(s) (PA) 0.000507 has 3 zero(s) (Math) -0.002009 has 2 zero(s) Barmar -0.002009 has 2 zero(s) (PMA) -0.002009 has 2 zero(s) (PA) -0.002009 has 2 zero(s) (Math) 1000 has Rendered as 0 zero(s) Barmar 1000 has 3 zero(s) (PMA) 1000 has 0 zero(s) (PA) 1000 has 0 zero(s) (Math) 0 has Rendered as 0 zero(s) Barmar 0 has 0 zero(s) (PMA) 0 has 0 zero(s) (PA) 0 has 0 zero(s) (Math) -3.9990233346998E-13 has 12 zero(s) Barmar -3.9990233346998E-13 has 0 zero(s) (PMA) -3.9990233346998E-13 has 0 zero(s) (PA) -3.9990233346998E-13 has 0 zero(s) (Math) 981 has Rendered as 0 zero(s) Barmar 981 has 0 zero(s) (PMA) 981 has 0 zero(s) (PA) 981 has 0 zero(s)

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