Как в php сделать вызов функции js?
Чтобы вызвать JavaScript функцию из PHP, можно использовать функцию echo и передать ей строку с вызовом функции.
Пример вызова JavaScript функции из PHP:
В данном примере мы вызываем функцию myFunction() из JavaScript с помощью тега <script> . Этот код будет выполнен на стороне клиента, когда браузер загрузит страницу.
Обратите внимание, что для того, чтобы вызвать JavaScript функцию из PHP, необходимо, чтобы эта функция была определена в загруженном на страницу скрипте. Если функция определена в отдельном файле, то этот файл должен быть подключен к странице перед вызовом функции.
How to Call a JavaScript Function from PHP?
PHP is a server-side programming language which means it executes at the server end and it will return the HTML code. On the other hand, Javascript is client-side (runs at client browser) scripting language, which is used normally to validate clients details.
Example 1: Call Javascript function declared in the head section
In this example we are calling Javascript function “jsFunction” which is declared in the head section.
Output:
You can execute Javascript through PHP by calling javascript code/function as a string in PHP and send it to the client browser to execute. See example 2.
How to execute a JavaScript Function in PHP?
In this article, we will discuss how to execute a javascript function in PHP. Before that let us discuss what is exactly a javascript function. Then we will go for call a JavaScript function in PHP.
What is a Javascript function?
The Javascript is the client-side script that can add, delete and modify the contents and designs of an HTML.
A function is a set of instructions that have reusability property and it is called by the function name.
Summing up, the javascript function is used to execute or trigger a function from a javascript code block(i.e written between <script> and </sccript>) by any event in HTML block.
Example:-
Output:-
How to trigger or call the javascript function from PHP
PHP considers every HTML element as strings inside the echo command. So, we will trigger the javascript function calls inside the echo command.
Let us illustrate a simple function call from PHP,
Output:-
Let us create a javascript function call by a button event i.e. onClick attribute,
Output:-
In this way, we can execute or call a javascript function in PHP. If you have any doubt, put a comment below,
One response to “How to execute a JavaScript Function in PHP?”
I tried calling a javascript function using onsubmit within php echo statement and it didn’t work, any ideas on why?
Call JavaScript Function in PHP
In this article, we will introduce a method to call JavaScript function from PHP. We actually cannot call JavaScript function using PHP as these two languages do not understand each other. The only possible option is outputting the JavaScript function call in PHP. However, we also can write JavaScript in a PHP file and call the function.
Use the echo Function to Display the JavaScript Function Call in PHP
JavaScript is a client-side scripting language, while PHP is a server-side language. Technically, we cannot invoke JavaScript functions from PHP. But we can display the JavaScript using the echo function. This method includes the JavaScript function call in the output rather than the JavaScript function in PHP. We will define a JavaScript function first and then call the function. We can wrap the JavaScript invocation of the function with the echo function in PHP. Here, most work will be done by JavaScript, which is the function declaration and invocation. We will use PHP only to display the function invocation.
For example, create a PHP file index.php and inside the script tag write a JavaScript function showMessage() . Write the alert() function inside the showMessage() function. Write the text click here in the alert() function. Then, somewhere in the code, open the PHP tag and write the script tag and call the showMessage() function inside the tag. Then, wrap the script tag with the echo function.
We can also separate each element in the invocation by a single quote. The example is shown below.
When we run the script, then an alert message will pop up saying click here . We treated the JavaScript function as a string and used it to display with the echo function. It should be noted that the function should be declared before the invocation. Thus, we called the JavaScript function in PHP using the echo function.