求教 十万猴急

Question

本帖最后由 jiye241 于 2012-12-18 23:20:43 编辑

Answer 1

<?php
$a =  array( array("id"=>1,"num"=>"4"), array("id"=>2,"num"=>"4"));
$b =  array( array("id"=>1,"num"=>"2"), array("id"=>3,"num"=>"4"));$c = array();
function compArray($new, &$c)
{
      foreach($new as $v){
            foreach($c as &$value){
                  if( $v['id'] === $value['id'] ){
                        $value['num'] += (int)$v['num'];
                        continue 2;
                  }
            }
            $c[] = $v;
      }
      
}
compArray($a, $c);
compArray($b, $c);
var_dump( $c);
我估计你只是来完成作业的，所以注释也懒的写