php數組操作執行個體三

*/
$array1=array("a"=>"green","red","blue");
$array2=array("b"=>"green","yellow","red");
$result=array_intersect($array1,$array2);//計算交集並賦值
print_r($result);

//

$search_array=array('first'=>1,'second'=>4);   //定義數組
if(array_key_exists('first',$search_array))    //判斷鍵是否存在於數組中
{
  echo "the 'first' element is in the array";    //輸出相應資訊
}

//

$ar1=array("color"=>array("favorite"=>"red"),5);
$ar2=array(10,"color"=>array("favorite"=>"green","blue"));
$result=array_merge_recursive($ar1,$ar2);   //合并兩個數組返回一個結果數組
print_r($result);         //輸出結果

//

$array1=array("color"=>"red",2,4);
$array2=array("a","b","color"=>"green","shape"=>"trapezoid",4);
$result=array_merge($array1,$array2);     //合并兩個數組
print_r($result);          //輸出結果內容

//

$ar1=array("10",100,100,"a");    //定義數組1
$ar2=array(1,3,"2",1);     //定義數組2
array_multisort($ar1,$ar2);    //排序2個數組
var_dump($ar1);      //列印排序後的結果
var_dump($ar2);      //列印排序後的結果

//
$stack=array("orange","banana","apple","rasp教程berry");  //定義一個數組
$fruit=array_pop($stack);        //最後一個元素出棧
print_r($stack);          //顯示結果

//

$stack=array("orange", "banana");     //定義原始數組
array_push($stack,"apple","raspberry");    //執行壓棧操作
print_r($stack);         //顯示結果，將返回四個值

//

srand((float)microtime()*10000000);       //為隨機數發生器播種
$input=array("neo","morpheus","trinity","cypher","tank");   //定義原始數組
$rand_keys=array_rand($input,2);       //隨機挑選數組元素
print $input[$rand_keys[0]]."n";        //分別顯示隨機挑選的數組元素
print $input[$rand_keys[1]]."n";