How Do Check If a PHP Session Is Empty

How do check if a PHP session is empty?

I would use isset and empty:

session_start();
if(isset($_SESSION['blah']) && !empty($_SESSION['blah'])) {
   echo 'Set and not empty, and no undefined index error!';
}

array_key_exists is a nice alternative to using isset to check for keys:

session_start();
if(array_key_exists('blah',$_SESSION) && !empty($_SESSION['blah'])) {
    echo 'Set and not empty, and no undefined index error!';
}

Make sure you're calling session_start before reading from or writing to the session array.

laravel how to check if session variable is empty

You can use

@elseif (session()->has('package_id'))

to verify if it's in session or in case it might be in session but also set to null, you can use:

@elseif (session()->get('package_id'))

Check if session exists in php

Use isset function

function ifsessionExists(){
// check if session exists?
  if(isset($_SESSION)){
    return true;
  }else{
    return false;
  }
 }

You can also use empty function

 function ifsessionExists(){
// check if session exists?
  if(!empty($_SESSION)){
    return true;
  }else{
    return false;
  }
 }

Check if session is set or not, and if not create one?

session_id() returns the string identifying the current session. If a session hasn't been initialized, it will return an empty string.

 if(session_id())
 {
      // session has been started
 }
 else
 {
      // session has NOT been started
      session_start();
 }

Check if PHP session has already started

Recommended way for versions of PHP >= 5.4.0 , PHP 7, PHP 8

if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

Reference: http://www.php.net/manual/en/function.session-status.php

For versions of PHP < 5.4.0

if(session_id() == '') {
    session_start();
}

PHP Session variable is empty when it's not empty

you need to start request session to read its content

add this code in you top header

if(!isset($_SESSION)) session_start();

Detect if PHP session exists

If $_SESSION (or $HTTP_SESSION_VARS for PHP 4.0.6 or less) is used, use isset() to check a variable is registered in $_SESSION.

isset($_SESSION['varname'])

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