After the execution of the statements above, the variable Show Note: When you assign a text value to a variable, put quotes around the value. Note: Unlike other programming languages, PHP has no command for declaring a variable. It is created the moment you first assign a value to it. Think of variables as containers for storing data. A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume). Rules for PHP variables:
Remember that PHP variable names are case-sensitive! Output VariablesThe PHP The following example will show how to output text and a variable: The following example will produce the same output as the example above: The following example will output the sum of two variables: Note: You will learn more about the PHP is a Loosely Typed LanguageIn the example above, notice that we did not have to tell PHP which data type the variable is. PHP automatically associates a data type to the variable, depending on its value. Since the data types are not set in a strict sense, you can do things like adding a string to an integer without causing an error. In PHP 7, type declarations were added. This gives an option to specify the data type expected when declaring a function, and by enabling the strict requirement, it will throw a "Fatal Error" on a type mismatch. You will learn more about In this tutorial, we will learn how to store a JavaScript variable value in PHP variable value. Since one runs on the server side and one runs on the client side. Hope this tutorial will be useful for you and I will try to make this tutorial easy to learn. JavaScript Variable into PHP variableSuppose we have JavaScript and PHP live in the same document, then PHP will be executed first and we know it is executed on the server side and the JavaScript will be executed second and we know that it will be executed on the browser side. In this way, both will never interact. Let’s understand with an example. Suppose I declare a JavaScript variable and I am unable to assign that value to PHP. This can be directly resolved using Ajax. But the problem is I don’t know Ajax. <html>
<body>
<script>
var myjavascriptVar=123;
<?php $myphpVar = 'myjavascriptVar';?>
</script>
<?php echo $myphpVar; ?>
</body>
</html>Code: //USING COOKIE <script> document.cookie = "myjavascriptVar = " + myjavascriptVar <?script> <?php $myphpVar = $_COOKIE['myjavascriptVar']; ?>
Using Ajax: The most ideal way to pass the JavaScript variable value in the PHP variable is to pass the JS variable to an AJAX call. But to do this we need to reload the page with the variable in a $_GET parameter and access the variable in PHP using $_GET[‘a’]. We can pass data from PHP to JavaScript in two ways depending on the situation. First, we can pass the data using the simple assignment operator if we want to perform the operation on the same page. Else we can pass data from PHP to JavaScript using Cookies. Cookie work in client-side. Program 1: This program passes the variables and data from PHP to JavaScript using assignment operator.
Output:  Here, we just take input by statically or dynamically and pass it to JavaScript variable using the assignment operator. The PHP code in the JavaScript block will convert it into the resulting output and then pass it to the variable x and then the value of x is printed. Program 2: This program passes the variables and data from PHP to JavaScript using Cookies.
Output: PHP provides a method to set the cookie using the setCookie() method. Here, we can set the data or variable in PHP cookie and retrieve it from JavaScript using document.cookie. Steps to Run the program:
PHP is a server-side scripting language designed specifically for web development. You can learn PHP from the ground up by following this PHP Tutorial and PHP Examples. Can I use PHP variable in JavaScript?But in some cases, you want to pass some server-side var to JavaScript. For example, required some values for the analysis. We can pass variables by using the Transform PHP Vars to JavaScript package.
Can I change PHP variable in JavaScript?You can't change the value of a PHP variable in JavaScript. PHP runs on the server and JS runs on the client PC. Using AJAX might be a better solution.
How to store JavaScript variable to PHP variable?The most ideal way to pass the JavaScript variable value in the PHP variable is to pass the JS variable to an AJAX call. But to do this we need to reload the page with the variable in a $_GET parameter and access the variable in PHP using $_GET['a']. <? php $var = $_GET['a']; ?>
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Can I set a PHP variable with JavaScript?
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