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run code in 150+ php & hhvm versions
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<?php $d = array( array( "id", "int(10) unsigned", "NO", "PRI", "auto_increment" ), array( "title", "varchar(32)", "NO" ), array( "author", "varchar(32)", "NO" ), array( "category", "tinyint(3) unsigned", "NO" ), array( "date", "datetime", "NO" ), array( "post_ip", "int(10) unsigned", "NO" ), array( "approved_by", "varchar(32)", "NO" ), array( "text", "text", "NO" ) ); $cols = array(); foreach ($d as $row) { $id = 0; foreach($row as $col) { if (!isset($cols[$id])) $cols[$id] = 0; if ($cols[$id] < strlen($col)) { $cols[$id] = strlen($col); } $id++; } } print_R($cols); /* id # int(10) unsigned # NO # PRI # auto_increment # [19:44] <teehee> title # varchar(32) # NO # [19:44] <teehee> author # varchar(32) # NO # [19:44] <teehee> category # tinyint(3) unsigned # NO # [19:44] <teehee> date # datetime # NO # [19:44] <teehee> post_ip # int(10) unsigned # NO # [19:44] <teehee> approved_by # varchar(32) # YES # [19:44] <teehee> text # text # NO # */
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => 11 [1] => 19 [2] => 2 [3] => 3 [4] => 14 )