PHP uses session two-dimensional array instance, session two-dimensional array instance_PHP tutorial

php uses session two-dimensional array instance, session two-dimensional array instance

The example in this article describes the use of session two-dimensional array in PHP. Share it with everyone for your reference. The details are as follows:

The most common usage: a variable name

Copy code The code is as follows:

$_SESSION['user'] = 0;
echo $_SESSION['user'];

Using an array:

Copy code The code is as follows:

$_SESSION['user']['a'] = 1;
$_SESSION['user']['b'] = 2;
echo $_SESSION['user']['a'];
echo $_SESSION['user']['b'];

The advantage of this is that it can be grouped.

If available:

Copy code The code is as follows:

$_SESSION['admin']['a'] = 11;
$_SESSION['admin']['b'] = 22;

I hope this article will be helpful to everyone’s PHP programming design.

PHP about two-dimensional arrays in session

Let me give you an example directly. Remember to add points directly....

a.php

session_start();

$sql = "SELECT * FROM [TABLE] WHERE ..";
$data=array();
$query = mysql_query( $sql , $link );
while($row=mysql_fetch_array ($query, MYSQL_ASSOC )){
$data[$row['id']] = array('name' => $row['name'] , 'price' => $row['price ']);
}
//The $data obtained at this time is similar to $data=array( 6 => array('name' => 'aa','price' => 100 ) , 16 => array('name' => 'bb','price' => 102 ) );

session_register("data");
echo "go b";
?>

b.php

session_start();
print_r($HTTP_SESSION_VARS ['data']);
?>

The code is very simple. Haha.

[Teaching, php] How to understand this $_SESSION two-dimensional array?

$_SESSION['cart'][$isbn] is a two-dimensional array. For example:
cart represents a person's shopping cart, and
$isbn represents an item.
Now when I go shopping, this cart represents me.
I bought a computer and a TV. $isbn represents a computer or a TV. It depends on whether it is a computer or a TV. The value passed by $_POST["save"].
If what is passed is a computer, then $_SESSION['cart'][$isbn]="computer".

http://www.bkjia.com/PHPjc/907284.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/907284.htmlTechArticlephp uses session two-dimensional array instance, session two-dimensional array instance This article tells the example of php using session two-dimensional array usage. Share it with everyone for your reference. The details are as follows: The most common...