PHPは配列の交差と差セットを得る

PHP          

  ：              ：2011-08-26 11:30:21 38603    

         218.642 ms   6      ，               。

      array_intersect()

array_intersect()             ，                                 。     ：

1    array array_intersect(array array1,array array2[,arrayN…])
          $fruit1        $fruit2 $fruit3          ：

01    <?php
02    $fruit1 = array("Apple","Banana","Orange");
03    $fruit2 = array("Pear","Apple","Grape");
04    $fruit3 = array("Watermelon","Orange","Apple");
05    $intersection = array_intersect($fruit1, $fruit2, $fruit3);
06    print_r($intersection);
07     
08    // output
09    // Array ( [0] => Apple )
10    ?>
                    ，array_intersect()            。

        array_intersect_assoc()

  array_intersect_assoc() array_intersect()    ，                。  ，           ，                /           。

    ：

1    array array_intersect_assoc(array array1,array array2[,arrayN…])
           $fruit1   ，      $fruit2 $fruit3     /  ：

01    <?php
02    $fruit1 = array("red"=>"Apple","yellow"=>"Banana","orange"=>"Orange");
03    $fruit2 = array("yellow"=>"Pear","red"=>"Apple","purple"=>"Grape");
04    $fruit3 =array("green"=>"Watermelon","orange"=>"Orange","red"=>"Apple");
05    $intersection = array_intersect_assoc($fruit1, $fruit2, $fruit3);
06    print_r($intersection);
07     
08    // output
09    // Array ( [red] => Apple )
10    ?>
      array_diff()

  array_diff()                       。     array_intersect()  。

1    array array_diff(array array1,array array2[,arrayN…])
    ：

01    <?php
02    $fruit1 = array("Apple","Banana","Orange");
03    $fruit2 = array("Pear","Apple","Grape");
04    $fruit3 = array("Watermelon","Orange","Apple");
05    $intersection = array_diff($fruit1, $fruit2, $fruit3);
06    print_r($intersection);
07     
08    // output
09    // Array ( [1] => Banana )
10    ?>
        array_diff_assoc()

  array_diff_assoc() array_diff()    ，               。  ，                        /            。     ：

1    array array_diff_assoc(array array1,array array2[,arrayN…])
         [yellow] => Banana,        /     $fruit1 ，  $fruit2 $fruit3     。

01    <?php
02    $fruit1 = array("red"=>"Apple","yellow"=>"Banana","orange"=>"Orange");
03    $fruit2 = array("yellow"=>"Pear","red"=>"Apple","purple"=>"Grape");
04    $fruit3 =array("green"=>"Watermelon","orange"=>"Orange","red"=>"Apple");
05    $intersection = array_diff_assoc($fruit1, $fruit2, $fruit3);
06    print_r($intersection);
07     
08    // output
09    // Array ( [yellow] => Banana )
10    ?>