WordPress RequirementsWordPress VersionWordPress PluginsPlugin NamePHP RequirementsPHP VersionExtensionsExtension VersionFunctionsGravity Forms RequirementsGravity Forms Add-OnsAdd-On NameAdd-On VersionCustom Requirements
As of Gravity Forms 2.2, add-ons can now easily define requirements that are needed before the add-on can be used. Defining requirements is as simple as overriding the minimum_requirements function in the GFAddOn class.
1234567891011class Example_AddOn extends GFAddOn { public function minimum_requirements() { return array( 'wordpress' => array( 'version' => '4.6.2', ) ); } }
WordPress Requirements
Using the wordpress array key, requirements based on the WordPress installation can be defined.
12345array( 'wordpress' => array( // WordPress-related requirements go here. ))
WordPress Version
Within the wordpress requirement, the version key can be used to define a specific WordPress version to be used as a minimum requirement. Versions higher than this number will succeed, while lower versions will fail.
12345array( 'wordpress' => array( 'version' => '4.6.2' ))
WordPress Plugins
12345array( 'plugins' => array( 'rest-api/plugin.php', ),)
Plugin Name
12345array( 'plugins' => array( 'jetpack/jetpack.php' => 'Jetpack by WordPress.com', ),)
PHP Requirements
Requirements related to PHP versions, extensions, or even available functions can be defined by using the php array key.
12345array( 'php' => array( // PHP-related requirements go here. ))
PHP Version
12345array( 'php' => array( 'version' => '5.6', ))
Extensions
1234567array( 'php' => array( 'extensions' => array( 'curl', ), ),)
Extension Version
123456789array( 'php' => array( 'extensions' => array( 'curl' => array( 'version' => '1.0', ), ), ),)
Functions
1234567array( 'php' => array( 'functions' => array( 'openssl_random_pseudo_bytes', ), ),)
Gravity Forms Requirements
Gravity Forms Add-Ons
12345array( 'add-ons' => array( 'gravityformsmailchimp', ),)
Add-On Name
1234567array( 'add-ons' => array( 'gravityformsstripe' => array( 'name' => 'Gravity Forms Stripe Add-On', ), ),)
Add-On Version
1234567array( 'add-ons' => array( 'gravityformspaypal' => array( 'version' => '5.0', ), ),)
Custom Requirements
123array( array( $this, 'custom_requirement_callback' ),)