Array assignment PHP list A simple example of assigning values ​​in an array to variables

list()

PHP list() assigns the values ​​in the array to some variables in one step. Like array(), list() is not a true function, but a language construct.

Syntax:

void list( mixed var, mixed ... ) Note: list() can only be used on numerically indexed arrays and assumes that numerical indexing starts from 0.

Example 1:

<&#63;php
$arr_age = array(18, 20, 25);
list($wang, $li, $zhang) = $arr_age;
echo $wang;    //输出：18
echo $zhang;    //输出：25
&#63;>

Example 2, data table query:

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

list() using array index

list() allows the use of another array to receive the value assigned by the array, just When using an indexed array, the order of assignment is opposite to the order listed in list():

$arr_age = array(18, 20, 25);

list($a[0], $a [1], $a[2]) = $arr_age;

print_r($a);The output $a array structure is as follows:

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

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