3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = ['monkey' => 1, 'giraffe' => 2, 'lion' => 3, 'walrus' => 4, 'zebra' => 5, 'narwhal' => 6]; $arr += array_splice($arr, array_search('giraffe', array_keys($arr)), 1); var_export($arr);
Output for 5.4.0, 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, 8.5.0
array ( 'monkey' => 1, 'lion' => 3, 'walrus' => 4, 'zebra' => 5, 'narwhal' => 6, 'giraffe' => 2, )
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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96.7 ms | 407 KiB | 5 Q