Online PHP editor | output for 3Ya5L

@ 2020-10-05T15:23:28Z

<?php

$total = 0.0;
$expected = 1.0;
for ($i = 0; $i < 10; $i++) {
    $total += 0.1;
}

echo "added ten cents\n";

// since we added 0.1 € x 10 times, we now have 1€ in total, right?
if ($total == $expected) {
    echo "I have {$expected}€. All is good in the realm.";
}
else {
    echo "WTF? Where is my money? I only have {$total}€!!!!\n";
    echo "\$total holds:";
    var_dump($total);
}


$balance          = 50.03;
$debit            = 45.42;
$expected_balance = 4.61;
$real_balance     = $balance - $debit;


if ($real_balance !== $expected_balance) {
    echo "balance mismatch: ";
    var_dump($real_balance);
}

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7: added ten cents WTF? Where is my money? I only have 1€!!!! $total holds:float(0.9999999999999999) balance mismatch: float(4.609999999999999)
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 added ten cents WTF? Where is my money? I only have 1€!!!! $total holds:float(0.9999999999999999) balance mismatch: float(4.609999999999999)
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: added ten cents WTF? Where is my money? I only have 1€!!!! $total holds:float(1) balance mismatch: float(4.61)

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