Online PHP editor | output for 1PPr3

@ 2024-11-24T21:43:02Z

<?php

$users = [['username' => 'Timothy'], ['username' => 'Frederic']];
$users2 = [['username' => 'Johnathon'], ['username' => 'Frederic'], ['username' => 'Peter']];

$counts = array_count_values(
    [
        ...array_column($users, 'username'),
        ...array_column($users2, 'username')
    ]
);
foreach ($counts as $user => $count) {
    printf(
        "<option%s>%s</option>\n",
        $count > 1 ? ' selected' : '',
        htmlentities($user)
    );
}

Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: <option>Timothy</option> <option selected>Frederic</option> <option>Johnathon</option> <option>Peter</option>
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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