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How to convert PHP variables to JavaScript variables

It is well noted that most programming languages cannot work alone without depending or using features of other programming languages, for example, a complete web system must have frontend technologies, server side languages and scripting languages.

Suppose you have variables that are defined in the PHP and you want to pass them and submit as JavaScript variables.

In this article, we shall discuss how you can pass PHP variables to JavaScript variables and then submit them mostly using Ajax, we shall also show different examples of how you can pass PHP variables.

PHP is commonly referred to as a loosely typed language since in PHP it does not have the strict rules when dealing with variables. In PHP you do not have to define whether it is an integer, double, float or a variable character

In JavaScript, variables are defined using the var attribute or defining the variable name without the var attribute.

How to define JavaScript variables

<script>

// with var attribute

var variable_name=" variable text ";

OR

// without var attribute

variable_name=" variable text ";

</script>

How to pass PHP variables to JavaScript

PHP variables are defined using the dollar sign ($) like shown below

<?php

$variable_name=" variable text ";

?>

The reason why you may need to pass or convert PHP to JavaScript is that you may need to submit form data using Ajax which is a JavaScript library. In previous articles, we discussed how to submit form data without reloading page using Ajax

Example 1 one variable

Defining PHP variable

<?php

$website_name="Solutions Space Network";

?>

Script which will pass PHP variable to JavaScript

<script>

var website_name="<?php echo $website_name ?>";

// to view the result of the above script you can use alert or console log

// using alert

alert(website_name);

// using console log

console.log(website_name);

</script>

 

Example 2 multiple variables

Defining PHP variables

<?php

$website_name="Solutions Space Network";

$domain_name="www.solutionspacenet.com";

?>

Script which will pass PHP variable to JavaScript

<script>

// defining variable name using var attribute

var website_name="<?php echo $website_name ?>";

//defining variable name without the var attribute

domain_name="<?php echo $domain_name ?>";

// to view the result of the above script you can use alert or console log

// using alert and combine variables

alert(website_name+" "+ domain_name);

// using console log

console.log(website_name+" "+ domain_name);

</script>

Example 3 PHP arrays

Defining PHP variable

<?php

// define array

$website=['name' => 'Solutions Space Network', 'domain' => 'www.solutionspacenet.com', 'category' => 'technology'];

// json encode array so that it can be printed in the browser

$website_details=json_encode($website);

?>

Script which will pass PHP variable to JavaScript

<script>

var website_details="<?php echo $website_details ?>";

// to view the result of the above script you can use alert or console log

// using alert

alert(website_details.name);

alert(website_details.domain);

</script>

 

That’s how you pass PHP variable to JavaScript so that the data can be submitted using Ajax to a server-side language for processing and storing to database

Remember in JavaScript, a variable is not just a variable, if you want to work with integers you must convert the variable to an integer or any other variable for JavaScript to understand the type of data it is working with