I wanted to put all the values of session in a variable named after the key so I came up with this code.
foreach($_SESSION as $key => $value){ $$key = $value; } For example I want used a session and saved a username on it using
$_SESSION['username'] = "Keith"; this means that I can use $username anytime. Now my problem is that how can I use all the information that the above code generates and use it inside a function like:
function get_content(){ echo $username; } You have to statefully pass in the variables to the function or use the global keyword.
An easy way to import the variables in an super global array into a functions scope is to use the extract. So in your function you can do this.
function get_contents(){ extract($_SESSION); echo $username; } For this you have to use function parameter
function get_content($var){ return $var; } Here you call that function by passing appropriate variable.
echo get_content($username); OR You can use extract suggested by Orangepill
function get_contents(){ extract($_SESSION); return $username; } Note : Don't use echo inside function to display the result.
get_content($username) and simply $username?
get_content($username) is preferable. :)Okay, so you can use extract() in your function to create local variables, but consider the following as well.
To make your function testable, it might be a better idea to explicitly expect an argument containing the context (an array like $_SESSION, but not necessarily).
function get_content(array $context) { echo $context['username']; } To call it you would write:
get_content($_SESSION); Note that you can still use extract($context); at the top to create local variables if you don't like the more explicit variable references.
To access a global variable from within a function, you have to use the global declaration:
function get_content(){ global $username; echo $username; } Or you can pass the variable as a parameter:
get_content($username); function get_content($username) { echo $username; } How you set the variables is irrelevant.
$$key = $_SESSIONshould be$$key = $value, otherwise each variable will get a copy of the entire session array.