3v4l.org

run code in 300+ PHP versions simultaneously
<?php $values = []; // start values $list = ['one', 'two', 'three']; // some list $oneMore = 'four'; // some element unset($list[2]); // unset last(!) list element $values = array_merge($values, $list); // add list to values $values[] = $oneMore; // add element to values print_r($values);

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