PHP array_walk_recursive() 函数

对数组中的每个元素应用用户自定义函数：

   <?php
   function myfunction($value,$key)
  {
  echo "The key $key has the value $value<br>";
  }
  $a1=array("a"=>"red","b"=>"green");
   $a2=array($a1,"1"=>"blue","2"=>"yellow");
  array_walk_recursive($a2,"myfunction");
   ?>