Online PHP editor | refs for 1fkMM

<?php $input = [ "prefix1 foo", "prefix2 bar", "prefix1 aaa", "prefix2 bbb", "prefix3 ccc", "prefix1 111", "prefix2 222" ]; $prefixes = ['prefix1', 'prefix2', 'prefix3']; $output = array(); $lastidx = count($prefixes); foreach ($input as $item) { list($prefix, $value) = explode(' ', $item); $index = array_search($prefix, $prefixes); if ($index < $lastidx) $output[] = array(); $output[count($output)-1][$prefix] = $value; $lastidx = $index; } print_r($output);