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If you want to dive into Prestashop development, these are likely the first methods you’ll be needing.

NOTICE: Values with “=” in the declaration are optionals.

Managing Configuration values in Prestashop

// Updating a single/multiple value/s
Configuration::updateValue($key, $values, $html = false, $id_shop_group = null, $id_shop = null);

// Getting a single value
Configuration::get($key, $id_lang = null, $id_shop_group = null, $id_shop = null)

// Getting Multiple Values
Configuration::getMultiple($keys, $id_lang = null, $id_shop_group = null, $id_shop = null)

// Getting the same key in all languages
Configuration::getInt($key, $id_shop_group = null, $id_shop = null)

// Erase the given entry
Configuration::deleteByName($key)

These methods are used to interact with the *prefix_*configuration table. It’s the quickest way to store simple data in Prestashop.

Example Usage

// Saving a normal string
$my_text = 'This is some text';
Configuration::updateValue('MY_CONFIG_PARAMETER', $my_text);

// Saving an html string
$my_text = '<p>This is some text</p>';
Configuration::updateValue('MY_CONFIG_PARAMETER', $my_text, true);

// Saving multiple values, KEYS represend ID_LANG
$my_texts = array(
	1 => 'This is some text',
	2 => 'This is some text in another language'
	);
Configuration::updateValue('MY_CONFIG_PARAMETER_MULTILANG', $my_text);


// Getting a single value
$my_text = Configuration::get('MY_CONFIG_PARAMETER');

// Getting a single value for the current language only
$my_text = Configuration::get('MY_CONFIG_PARAMETER', $this->context->language->id);

// Getting Multiple Values
$keys_to_get = array('MY_CONFIG_PARAMETER', 'OTHER_CONFIG_PARAMETER');
Configuration::getMultiple($keys_to_get);

// Delete the given key
Configuration::deleteByName('MY_CONFIG_PARAMETER');

Getting POST and GET in Prestashop

Tools::getValue($key, $default_value = false)

Retrieves the current POST or GET variable with the given key

Example Usage

// Getting either POST or GET with the key 'myvalue', the second parameter is what to assign then nothing is found.
$value = Tools::getValue('myvalue', 4);
// If no 'myvalue' POST or GET variable is set, $value will be 4.

Checking for submitted data in Prestashop

Tools::isSubmit($key);

Check whether or not the given key has been submitted to the current page.

Example Usage

if(Tools::isSubmit('myvalue'))
{
	// do something
}

Displaying Errors in Prestashop

Tools::displayError($string = 'Fatal error', $htmlentities = true, Context $context = null)

Displays an error with proper formatting.

Example Usage

if($myvalue != 1)
{
	// will need to be displayed later on
	$error_string = Tools::displayError('It is different from 1');
}

Displaying Confirmations in Prestashop Modules

$this->displayConfirmation($string);

Displays a properly formatted confirmation message. $this refers to a module, it is therefore only available in module contexts only. Refer to the proper variable elsewhere.

// this is inside a module's method
if($myvalue == 1)
{
	// will need to be displayed later on
	$conf_string = $this->displayConfirmation('Updated!');
}

Adding CSS in Prestashop

ControllerCore::addCSS($css_uri, $css_media_type = 'all', $offset = null, $check_path = true)

Appends the given CSS file/s to the page

Example Usage

// this is inside a module's method
$this->context->controller->addCSS($this->_path.'css/myfile.css', 'all');

// this is inside a controller's method
$this->addCSS(_THEME_CSS_DIR_.'product.css');

// adding multiple files
$files = array(
	_THEME_CSS_DIR_.'product.css' => 'all',
	_THEME_CSS_DIR_.'other_css.css' => 'all'
);
$this->addCSS($files);

Adding Javascript in Prestashop

ControllerCore::addJS($js_uri, $check_path = true);

Appends the given JS file/s to the page

Example Usage

// this is inside a module's method
$this->context->controller->addCSS($this->_path.'css/myfile.css', 'all');

// this is inside a controller's method
$this->addCSS(_THEME_CSS_DIR_.'product.css');

Adding jQuery Plugins in Prestashop

ControllerCore::addJqueryPlugin($name, $folder = null, $css = true)

Appends the given jQuery Plugin/s to the page

Example Usage

// this is inside a module's method, multiple files
$this->context->controller->addjqueryPlugin('fancybox');

// this is inside a controller's method
$this->addjqueryPlugin('fancybox');

// this is inside a controller's method, multiple values
$this->addjQueryPlugin(array('scrollTo', 'alerts', 'chosen', 'autosize', 'fancybox' ));

// this is inside a controller's method, without loading the plugin's CSS
$this->addjQueryPlugin('growl', null, false);

Adding jQuery UI Components in Prestashop

ControllerCore::addJqueryUI($component, $theme = 'base', $check_dependencies = true);

Appends the given jQuery UI component/s to the page

Example Usage

// this is inside a module's method, single file
$this->context->controller->addjQueryUI(ui.datepicker');

// this is inside a controller's method, multiple files
$this->addJqueryUI(array('ui.slider', 'ui.datepicker'));

Wrapping it up

We saw quite a number of useful PrestaShop Functions today, which are enough to start coding your own, simple module. Apart from trying to remember them all, I suggest creating code snippets with some text expander, so you can quickly drop them in, without having to remember the exact syntax.

Additional Resources

• Essential Prestashop Functions – Day 2
• Essential Prestashop Functions – Day 3
• Essential Prestashop Functions – Day 4
• Essential Prestashop Functions – Day 5

The post Essential Prestashop Functions – Day 1 appeared first on NemoPS.