phparray_flip()与array_uniqure()删除数组重复元素_PHP教程

$arr = array(…………) ;// 假设有数组包含一万个元素，里面有重复的元素。

$arr = array_flip(array_flip($arr)); // 这样便可以删除重复元素。

$arr1 = array("age" => 30, "name" => '快乐园');

$arr2 = array_flip($arr1);　// $arr2 就是 array(30 => "age", '快乐园' => "name");

$arr1 = array("age" => 30, "name" => '快乐园', "age" => 20);　"age" => 2 0将会取代 "age" => 30

$arr1 = array("name" => '快乐园', "age" => 45);

$arr1 = array("age" => 30, "name" => '快乐园', "age" => 20);

$arr1 = array_flip($arr1); // $arr1 变成了 array("快乐园" => "name", 20 => "age");

// 再把 $arr1 的键名与值还复：

$arr1 = array_flip($arr1);

$output = array(1, 2, 2, 'www.bKjia.c0m', 5, 4, 4, 4, 2, 7, 5, 9, 10);
delsame($output);
while(list($key, $value) = each($output))
{
echo "$key:$value"."
";
}
//方法二

function uniquearray($array)

{

// get unique elts as keys in assoc. array

for ($i=0,$n=count($array, 1);$i<$n;$i )

$u_array[$array[$i]] = 1;

// copy keys only into another array

reset($u_array, 1);

for ($i=0,$n=count($u_array, 1);$i<$n;$i ) {

$unduplicated_array[] = key($u_array, 1);

next($u_array, 1);

}

return $unduplicated_array;

}