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<?php $array = array(array(0), 'first' => array('first'), array(1),array(2), 'second'=>array('second'), array(3), array(4)); uksort($array, function ($ka, $kb) { if (is_int($ka)) { if (!is_int($kb)) return 1; return $ka - $kb; } else { if (is_int($kb)) return -1; return strcmp($ka, $kb); } }); print_r($array);
Output for 7.2.0 - 7.2.33, 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 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
Array ( [first] => Array ( [0] => first ) [second] => Array ( [0] => second ) [0] => Array ( [0] => 0 ) [1] => Array ( [0] => 1 ) [2] => Array ( [0] => 2 ) [3] => Array ( [0] => 3 ) [4] => Array ( [0] => 4 ) )
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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