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<?php $strings = array('SS2014', 'SU2014','FW2014','FW2013', 'SU2013','SS2013'); $cleanUpResult = array(); $counter = 0; $previousYear = ''; $currentIndex = 10; foreach($strings as $row){ if($counter == 0){ $previousYear = substr($row, -4); } if($previousYear !== substr($row, -4)){ $currentIndex += 10; } if($counter > 0){ $previousYear = substr($row, -4); } switch(substr($row, 0, 1)){ case 'SS': $cleanUpResult[$currentIndex + 1] = $row; break; case 'SU': $cleanUpResult[$currentIndex + 2] = $row; break; case 'FW': $cleanUpResult[$currentIndex + 3] = $row; break; case 'WI': $cleanUpResult[$currentIndex + 4] = $row; break; case 'XM': $cleanUpResult[$currentIndex + 5] = $row; break; case 'CO': $cleanUpResult[$currentIndex + 6] = $row; break; case 'NW': $cleanUpResult[$currentIndex + 7] = $row; break; } $cleanUpResult[] = $row; $counter++; } var_dump($cleanUpResult);
Output for git.master, git.master_jit, rfc.property-hooks
array(6) { [0]=> string(6) "SS2014" [1]=> string(6) "SU2014" [2]=> string(6) "FW2014" [3]=> string(6) "FW2013" [4]=> string(6) "SU2013" [5]=> string(6) "SS2013" }

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