1 <?php 2 $arrs = Array ( 3 Array ( 'rname' => '小麦', 'm1'=> 12.00 ,'m2'=> 33,'qq'=> 33 ) , 4 Array ( 'rname' => '小麦', 'm1' => 23.00,'m2'=> 44,'qq'=> 11 ) , 5 Array ( 'rname' => 'ccc', 'm1' => 11,'m2'=> 22,'qq'=> 12 ) 6 ); 7 8 //计算出重复字段出现的次数 9 $b=array(); 10 foreach($arrs as $v){ 11 $b[]=$v['rname']; 12 } 13 $c=array_unique($b); 14 foreach($c as $v){ 15 $n=0; 16 foreach($arrs as $t){ 17 if($v==$t['rname']) 18 $n++; 19 } 20 $d[]['nn']=$n; 21 22 } 23 24 //合并数组中重复的值,并进行加计算 25 $tmpval=array(); 26 $data=array(); 27 $i=0; 28 //遍历原数据 29 foreach($arrs as $key=>$arr){ 30 31 if(!empty($tmpval) && array_key_exists($arr['rname'],$tmpval)){ 32 //存在 33 $key=$tmpval[$arr['rname']]; 34 35 $data[$key]['m1']+=$arr['m1']; 36 37 $data[$key]['m2']+=$arr['m2']; 38 }else{ 39 //不存在 40 $tmpval[$arr['rname']]=$i; 41 $data[$i++]=$arr; 42 } 43 } 44 45 //把2个二维数组合并成一个二维数组 46 $zuizhong = array(); 47 foreach($data as $k=>$r){ 48 $zuizhong[] = array_merge($r,$d[$k]); 49 } 50 51 //计算出平均值 52 $datas = array(); 53 foreach($zuizhong as $key=>$arr){ 54 $datas[$key]['rname'] = $arr['rname']; 55 $datas[$key]['m1'] = $arr['m1']/$arr['nn']; 56 $datas[$key]['m2'] = $arr['m2']/$arr['nn']; 57 } 58 59 echo "<pre>"; 60 print_r($d); 61 print_r($data); 62 print_r($zuizhong); 63 print_r($datas);
http://www.cnblogs.com/losesea/archive/2013/06/14/3134900.html