随机数组和二维排序.php

$a=array("red","green","blue","yellow","brown");
$random_keys=array_rand($a);
echo $a[$random_keys]."
";



$array[] = array('id'=>1,'price'=>50);
$array[] = array('id'=>2,'price'=>70);
$array[] = array('id'=>3,'price'=>30);
$array[] = array('id'=>4,'price'=>20);

foreach ($array as $key=>$value){
    $id[$key] = $value['id'];
    $price[$key] = $value['price'];
}

array_multisort($price,SORT_NUMERIC,SORT_ASC,$id,SORT_STRING,SORT_ASC,$array);
echo '
';
print_r($array);
echo '
';