I want to change a variable during runtime in Magento 2. Is this possible? If I look at how scope configuration works it only exists of getters, but I cannot find a way to manipulate this during runtime.

Please note that I do not want to save the value.

My use case: for some specific pages I want to hide the suffix. I want to do this by changing the configuration value design/head/title_suffix during runtime so it's reflected everywhere where this value is used.

1 Answer 1


The best way of doing this would be adding an after plugin for getting the Page title, you would not want to hook into the function for getting configs otherwise it would run every time a config is retrieved.

I do not know the exact logic you want to implement for when to change the suffix so the code below always changes the suffix, but the logic could be changed within shouldModify(). In a module:


<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    <type name="Magento\Framework\View\Page\Title">
        <plugin name="vendorname_modulename_framework_view_page_title"
                type="VendorName\ModuleName\Plugin\Title" />


namespace VendorName\ModuleName\Plugin;

class Title
     * @var \Magento\Framework\App\Config\ScopeConfigInterface
    private $scopeConfig;

     * @param \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
    public function __construct(
        \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
    ) {
        $this->scopeConfig = $scopeConfig;

     * @param \Magento\Framework\View\Page\Title $subject
     * @param string $result
     * @return string $result
    public function afterGet(\Magento\Framework\View\Page\Title $subject, $result) // @codingStandardsIgnoreLine
        if ($this->shouldModify()) {
            return rtrim($result, $this->scopeConfig->getValue(
            )) . ' New suffix';
        return $result;

     * @return boolean
    public function shouldModify()
        return true;

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