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run code in 150+ php & hhvm versions
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<?php $array = array('a' => 2, 'b' => 1, 'c' => 4); $first = array(key($array) => current($array)); // Get the first key/value pair array_shift($array); // Remove it from your array die(end($array)); $last = array(end($array) => key($array)); // Get the last key/value pair array_pop($array); // Remove it from the array $array = array_merge($last, $array, $first); // Put it back together print_r($array);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0

Process exited with code 4.