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Leaf Flash

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Leaf flash is a class available on the leaf session module. Check out the session module docs for installation instructions.

This is a simple helper for creating and managing PHP flash messages. It is highly customizable just like the rest of Leaf and fits right into any project no matter it's size or scope.

To get started, simply call the method you want to use. Leaf Flash uses static methods, so there's no need for initializing.

Flash uses session to temporarily save variables.


As mentioned above, Leaf Flash is super customizable. All this customization is done through Leaf Flash config.

You don't need to do any of this. Leaf Flash works perfectly out of the box.

Using the config method, you can change where Leaf stores flash messages in session, the keys for messages and saved content. The available options are:

  • key: The key to save flash array in session. Default: leaf.flash,
  • default: The key for default flash messages. Default: message,
  • saved: The key for saved flash messages. Default: leaf.flash.saved,
  "key" => "my_flash_items"

flash()->set("This is my message");

// logging $_SESSION
=> ["my_flash_items" => ["message" => "This is my message"]]
use Leaf\Flash;

  "key" => "my_flash_items"

Flash::set("This is my message");

// logging $_SESSION
=> ["my_flash_items" => ["message" => "This is my message"]]

Flash searches for an existing session and creates one if there's no active session.


Set as the name implies allows you to save a flash message.

flash()->set("This is my message");
Leaf\Flash::set("This is my message");

This saves the message with the key message. If you want to use another key, you can pass it in as a second parameter.

flash()->set("This is my message", "info");
Leaf\Flash::set("This is my message", "info");

Using this functionality you can have multiple flash messages at the same time. In that case, they won't be unset until they are viewed.

flash()->set("This is my message", "info");
flash()->set("This is my message", "error");
flash()->set("This is my message", "success");
Leaf\Flash::set("This is my message", "info");
Leaf\Flash::set("This is my message", "error");
Leaf\Flash::set("This is my message", "success");


unset does the opposite: it removes a flash message. You won't be needing this method in most cases.

flash()->unset("This is my message");
flash()->unset("This is my message", "info");
Leaf\Flash::unset("This is my message");
Leaf\Flash::unset("This is my message", "info");


This method is used to get a flash message. As soon as the flash message is retrieved, it is removed from the session which means it won't show on the next load.

flash()->set("message 1");
flash()->set("message 2", "info");

echo flash()->display(); // message 1
echo flash()->display("info"); // message 2
Leaf\Flash::set("message 1");
Leaf\Flash::set("message 2", "info");

echo Leaf\Flash::display(); // message 1
echo Leaf\Flash::display("info"); // message 2


Flash also allows you to save a message in session. This message will stay in session till it is manually removed. Note that unlike regular flashes, there can be only one saved flash message.

flash()->save("This is my message");
Leaf\Flash::save("This is my message");


This is unset for saved messages.



This is display for saved messages.

echo flash()->displaySaved();
echo Leaf\Flash::displaySaved();
Leaf Flash has loaded