There are cases where test scenarios may fail unexpectedly with Selenium commands (e.g., click operation on the button web element does not result in a click even though the button is enabled). Such issues are more pertinent when creating an XHR request or when attempting to access another frame. For overcoming such issues, you can execute JavaScript in Selenium through the JavaScriptExecutor interface.
Introduction to JavaScriptExecutor
If locating or performing the required operations on the web elements does not work as expected with Selenium locators like XPath, Name, etc., the JavaScriptExecutor interface can be used to tackle the problem. JavaScriptExecutor is an interface that is available for all the languages that support the Selenium framework, including PHP.