How to Pass PHP Variables to JavaScript

In this article, we will discuss how to pass PHP variables to JavaScript. We will answer some common questions about this process, and provide step-by-step instructions on how to do it. This can be a helpful skill for web developers who want to create more dynamic and interactive websites. Let’s get started!

Pass PHP Variables to JavaScript

Passing PHP variables to JavaScript is a relatively simple process. However, there are a few things to keep in mind when doing this.

First, you need to make sure that your PHP code is properly formatted. This means using proper syntax and indentation. If your code is not properly formatted, it can cause errors when trying to pass the variables to JavaScript.

Second, you need to make sure that your variable names are unique. This is important because if you have multiple variables with the same name, only one of them will be passed to JavaScript.

Finally, you need to make sure that your variable values are correctly escaped for use in JavaScript. Failure to do this can result in security vulnerabilities.

We’ll use AJAX to pass a PHP variable to JavaScript. This technique makes a request for the data from the PHP server and executes on the client machine.

We’ll show you another technique to send a PHP variable in JavaScript by escaping the PHP to JavaScript. To escape the PHP, we write JavaScript after the PHP scripts.

Use AJAX to Pass the PHP Variable to JavaScript

We could get the data and variables from the PHP server to JavaScript with AJAX. There are two separate server-side and client-side scripts in this approach. It makes the code more readable by removing clutter and providing whitespace. Asynchronous JavaScript and XML is abbreviated to AJAX.

It makes an XMLHttpRequest call to the server to obtain the information. It displays the data using JavaScript and HTML DOM, which means it requires minimal knowledge of web design or programming. This process takes place asynchronously, resulting in alterations to the webpage that do not require a page reload. When AJAX is used across network connections, there is a delay because it transmits an HTTP request. We use JavaScript code in a PHP file in this approach.

<?php
$var = "Mountain";
echo json_encode($var); 
?>

Use JavaScript to Escape the PHP Scripts to Pass the PHP Variable to JavaScript

After the PHP tags, we can utilize JavaScript to escape the PHP scripts. In the PH P script, we may declare a PHP variable. Then, using JavaScript to escape the preceding written PHP and pass the variable inside the code.

<?php
$var = 'Metallica';
?>
<script>
   <?php
       echo "var jsvar ='$var';";
   ?>
   console.log(jsvar); 
</script>

Use the Short PHP Echo Tag, <?=?> Inside the JavaScript to Pass the PHP Variable to JavaScript

We can use the short PHP echo tag to pass a PHP variable to JavaScript within the JavaScript. We may utilize the short PHP echo tag to save time by avoiding the need to type out the PHP tag and the echo statement. It’s a shortened form of expression. This approach, too, is very similar in terms of concept and execution to the second option.

<?php
$var = 'Megadeth';
?>
<script>
    var jsvar = '<?=$var?>';
    console.log(jsvar); 
</script>
?>

Conclusion

We hope this article has helped you understand how to pass PHP variables to JavaScript. As always, if you have any questions or comments, please feel free to reach out to us. We’re happy to help! Happy coding!

Leave a Comment