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<?php $array = [ "key 1" => ['more data' ], "key 2" => [ 'even more data' ], "key 3" => [ 'some data' ], "key 4" => [ 'where is the data' ] ]; $key = 'key 3'; $moved = move_to_first_in_array($array , 'key 3'); print_r($moved); function move_to_first_in_array($array, $key) { return [$key => $array[$key]] + $array; }
Output for 5.6.38, 7.1.0 - 7.1.22, 7.2.0 - 7.2.33, 7.3.16 - 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 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
Array ( [key 3] => Array ( [0] => some data ) [key 1] => Array ( [0] => more data ) [key 2] => Array ( [0] => even more data ) [key 4] => Array ( [0] => where is the data ) )
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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