README

A generic PHP loader/progress bar utility package to help with applications that need to display a loading bar during a long running process.

Install with composer:

composer require stilliard/generic-loading-bar

Basic usage

use GLB\LoadingBar;
$loading = new LoadingBar;
$loading->step(); // each call is 1/100 (or whatever steps is set to)
$loading->set(40); // set a specific loaded %
$loading->complete(); // sets to 100 to mark as complete
$loading->reset(); // sets to 0 to start over

or with options:

$loading = new LoadingBar([
    'codename' => 'my_loading_bar',
    'min' => 0,
    'max' => 100,
    'steps' => 150, // default: 100
    'dataHandler' => DBDataHandler::class, // default ProcessDataHandler
    'displayHandler' => HTMLDisplayHandler::class, // default EchoDisplayHandler
]);

$loading->step(); // each call is then 1/150 (or whatever steps is set to)

Display the loading bar

echo $loading->display(); // displays the html loading bar with auto refresh

or

echo $loading; // same as above

Ranged loading calculations

Ranged calculations are the original reason for this package. Want to split your loading into 4 parts, each with 25% but then have maybe thousands of records to process inside? This handles this for you.

$totalProducts = count($products);
foreach ($products as $i => $product) {
    // fill in the range between 25% to 50% as the % of the total products handled so far. [index, total]
    $loading->calc([25, 50], [$i + 1, $totalProducts]);
}

Demo

Check out the demo folder for a basic CLI demo in cli.php, or a full web and background process demo using the Redis data handler in the html folder, there's a README.md file in there with more information.

Data Handlers

• Process ProcessDataHandler runs just in process and doesn't save anywhere
• Redis RedisDataHandler uses redis to store the current loading %
• PDO PDODataHandler uses a database with a PDO instance, lets you pass a DB PDO instance/object in via the construct options to then query an assumed loading_bars table with name and value columns.
• DB DBDataHandler like above PDO one but instead of passing a pdo instance, it assumes you have a DB global class

Build your own by extending the abstract BaseDataHandler class, see how the above ones work as an example in the src/DataHandler folders.

Display Handlers

• Echo EchoDisplayHandler simply echos/outputs the current % at the point of ->display() called
• Console ConsoleDisplayHandler a CLI/Console ascii loading/progress bar e.g. [===> ] 50%
• HTML HTMLDisplayHandler shows a <progress> element at point of display, could then be auto refreshed from there through ajax

Build your own by extending the abstract BaseDisplayHandler class, see how the above ones work as an example in the src/DisplayHandler folders.

License

This project is open-sourced software licensed under the MIT license.