some iteration func

iteration.php

<?php
/**
 * Created by sqiu.
 * CreateTime: 13-6-6 下午7:18
 * 
 */

$src = array();
$src[] = array('A','B','C','D','E');
$src[] = array('+', '-', '*', '/');
$src[] = array(1,2,3);

$combine = iteration_get_combine($src);
echo '<pre>';
print_r($combine);
echo '</pre>';


/**
 * @param       $src
 * @param array $treenode
 * @param int   $src_index
 * @param array $strarr
 *
 * @return array|string
 */
function iteration_gen_tree_witch_each_array($src, $treenode = array(), $src_index=0, $strarr=array()){
	if(!isset($src[$src_index])) return '';
	foreach($src[$src_index] as $nodekey){
		$treenode[$nodekey] = iteration_gen_tree_witch_each_array($src, $strarr[$nodekey], $src_index+1, $strarr);
	}
	return $treenode;
}

/**
 * @param       $node
 * @param       $tree
 * @param array $pk
 */
function iteration_convert_to_one_node_from_tree(&$node, $tree, $pk=array()){
	if($node===NULL) $node = array();
	foreach($tree as $k=>$item){
		$_pk = $pk;
		array_push($_pk, $k);
		if(is_array($item)){
			iteration_convert_to_one_node_from_tree($node, $item, $_pk);
		}else{
			array_push($node, $_pk);
		}
	}
}

/**
 * @param $array
 *
 * @return array
 */
function iteration_join_each_node($node){
	$ret = array();
	foreach($node as $arr){
		$ret[] = implode(',', $arr);
	}
	return $ret;
}

/**
 * @param $src
 *
 * @return array
 */
function iteration_get_combine($src){
	$tree = iteration_gen_tree_witch_each_array($src);
	iteration_convert_to_one_node_from_tree($node, $tree);
	$combine = iteration_join_each_node($node);
	return $combine;
}





//result below
/*
Array
(
    [0] => A,+,1
    [1] => A,+,2
    [2] => A,+,3
    [3] => A,-,1
    [4] => A,-,2
    [5] => A,-,3
    [6] => A,*,1
    [7] => A,*,2
    [8] => A,*,3
    [9] => A,/,1
    [10] => A,/,2
    [11] => A,/,3
    [12] => B,+,1
    [13] => B,+,2
    [14] => B,+,3
    [15] => B,-,1
    [16] => B,-,2
    [17] => B,-,3
    [18] => B,*,1
    [19] => B,*,2
    [20] => B,*,3
    [21] => B,/,1
    [22] => B,/,2
    [23] => B,/,3
    [24] => C,+,1
    [25] => C,+,2
    [26] => C,+,3
    [27] => C,-,1
    [28] => C,-,2
    [29] => C,-,3
    [30] => C,*,1
    [31] => C,*,2
    [32] => C,*,3
    [33] => C,/,1
    [34] => C,/,2
    [35] => C,/,3
    [36] => D,+,1
    [37] => D,+,2
    [38] => D,+,3
    [39] => D,-,1
    [40] => D,-,2
    [41] => D,-,3
    [42] => D,*,1
    [43] => D,*,2
    [44] => D,*,3
    [45] => D,/,1
    [46] => D,/,2
    [47] => D,/,3
    [48] => E,+,1
    [49] => E,+,2
    [50] => E,+,3
    [51] => E,-,1
    [52] => E,-,2
    [53] => E,-,3
    [54] => E,*,1
    [55] => E,*,2
    [56] => E,*,3
    [57] => E,/,1
    [58] => E,/,2
    [59] => E,/,3
)

count: 5*4*3
*/