php中list()函数实例用法和怎么将数组中的值赋给变量

void list( mixed var, mixed ... )

<?php
$info = array('coffee', 'brown', 'caffeine');
// Listing all the variables
list($drink, $color, $power) = $info;
echo "$drink is $color and $power makes it special.n";
// Listing some of them
list($drink, , $power) = $info;
echo "$drink has $power.n";
// Or let's skip to only the third one
list( , , $power) = $info;
echo "I need $power!n";
// list() doesn't work with strings
list($bar) = "abcde";
var_dump($bar); // NULL
?>

<?php
$arr_age = array(18, 20, 25);
list($wang, $li, $zhang) = $arr_age;
echo $wang;    //输出：18
echo $zhang;    //输出：25
?>

$result = mysql_query("SELECT id, username, email FROM user",$conn);
while(list($id, $username, $email) = mysql_fetch_row($result)) {
  echo "用户名：$username<br />";
  echo "电子邮箱：$email";
}

$arr_age = array(18, 20, 25);
list($a[0], $a[1], $a[2]) = $arr_age;

Array ( [2] => 25 [1] => 20 [0] => 18 )