程式設計@筆記

[php]array_uintersect 計算陣列的交集，用回調函數比較數據

(PHP 5)

官方範例：
<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");

print_r(array_uintersect($array1, $array2, "strcasecmp"));
?>

以上例程會輸出：

Array
(
    [a] => green
    [b] => brown
    [0] => red
)

其它範例
<?php
function myfunction($v1,$v2)
{
if ($v1===$v2)
  {
  return 0;
  }
if ($v1 > $v2) return 1;
  {
  return -1;
  }
return 1;
}
$a1=array("a"=>"Cat","b"=>"Dog","c"=>"Horse");
$a2=array(1=>"Cat",2=>"Dog",3=>"Fish");
print_r(array_uintersect($a1,$a2,"myfunction"));
?>

以上例程會輸出：
Array ( [a] => Cat [b] => Dog )