note 111825 added to control-structures.foreach

If you wondered how to create a list of all possible combinations of variable amount of arrays (multiple foreach), you might use this: <?php $a[0] = array('a1','a2'); $a[1] = array('b1','b2','b3'); $a[2] = array('c1','c2'); function getAllCombinations($a,$i,$s) { foreach ($a[$i] as $v) { if (!isset($a[$i+1])) { echo $s.$v."\n"; } else { getAllCombinations($a,$i+1,$s.$v); } } return $s; } echo getAllCombinations($a,0,''); ?> the result: a1b1c1 a1b1c2 a1b2c1 a1b2c2 a1b3c1 a1b3c2 a2b1c1 a2b1c2 a2b2c1 a2b2c2 a2b3c1 a2b3c2 ---- Server IP: 69.147.83.199 Probable Submitter: 82.209.8.34 ---- Manual Page -- http://php.net/manual/en/control-structures.foreach.php Edit -- https://master.php.net/note/edit/111825 Del: integrated -- https://master.php.net/note/delete/111825/integrated Del: useless -- https://master.php.net/note/delete/111825/useless Del: bad code -- https://master.php.net/note/delete/111825/bad+code Del: spam -- https://master.php.net/note/delete/111825/spam Del: non-english -- https://master.php.net/note/delete/111825/non-english Del: in docs -- https://master.php.net/note/delete/111825/in+docs Del: other reasons-- https://master.php.net/note/delete/111825 Reject -- https://master.php.net/note/reject/111825 Search -- https://master.php.net/manage/user-notes.php