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PHP输出多个元素的排列或组合的方法
•php函数•阅读 259 - <?php
- $arr=array('a','b','c','d');
- $result=array();
- $t= getCombinationToString($arr, 1);
- print_r($t);
- $t= getCombinationToString($arr, 2);
- $t2= getunique($t);
- print_r($t2);
- $t= getCombinationToString($arr, 3);
- $t2= getunique($t);
- print_r($t2);
- $t= getCombinationToString($arr, 4);
- $t2= getunique($t);
- print_r($t2);
- functiongetunique($t){
- $t2=array();
- //print_r($t);
- for($i=0;$i<count($t);$i++){
- $count_list=array_count_values($t[$i]);
- $flag= 1;
- <a href="/tags.php/foreach/" target="_blank">foreach</a>($count_listas$ck=>$cv){
- if($cv>1){
- $flag= 0;
- break;
- }
- }
- if($flag){
- sort($t[$i]);
- $flag2= 1;
- if($t2){
- foreach($t2as$t2k=>$t2v){
- if($t[$i]==$t2v){
- $flag2= 0;
- break;
- }
- }
- }
- if($flag2){
- $t2[] =$t[$i];
- }
- }
- }
- return$t2;
- }
- functiongetCombinationToString($arr,$m) {
- if($m==1) {
- return$arr;
- }
- $result=array();
- $tmpArr=$arr;
- unset($tmpArr[0]);
- for($i=0;$i<count($arr);$i++) {
- $s=$arr[$i];
- $ret= getCombinationToString(array_values($tmpArr), ($m-1),$result);
- foreach($retas$row) {
- //$result[] = $s . $row;
- $temp=array();
- $temp[] =$s;
- if(is_array($row)){
- $temp=array_merge($temp,$row);
- }else{
- $temp[] =$row;
- }
- sort($temp);
- $result[] =$temp;
- } //phpfensi.com
- }
- return$result;
- }
- ?>