3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ 'John', 'Brian', 'Julia', 'Adam', 'Brian', 'Jonathan', 'Amanda', 'Julia', 'Nathan' ]; $order = []; foreach ($array as $i => $v) { $lookup[$v] ??= $i; $order[] = $lookup[$v]; } array_multisort($order, $array); var_export($array);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.4.16, 8.5.0 - 8.5.1
array ( 0 => 'John', 1 => 'Brian', 2 => 'Brian', 3 => 'Julia', 4 => 'Julia', 5 => 'Adam', 6 => 'Jonathan', 7 => 'Amanda', 8 => 'Nathan', )
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.
Output for 7.2.34, 7.3.0
Parse error: syntax error, unexpected '=' in /in/OCpQv on line 17
Process exited with code 255.
preferences:
118.14 ms | 408 KiB | 5 Q