Online PHP editor | output for 2uYgo

@ 2021-06-14T22:30:03Z

<?php

function containsOnlyNull(array $array): bool
{
    foreach ($array as $value) {
        if ($value !== null) {
            return false;
        }
    }
    return true;
}

echo 'a: ' . var_export(containsOnlyNull([null,null,null,null,null]), true);  // 5 iterations for true outcome
echo "\n";
echo 'b: ' . var_export(containsOnlyNull([null,null,1,null,null]), true);  // 3 iterations for false outcome

Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12: a: true b: false
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 a: true b: false

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