How Do I Send a JavaScript Variable to a PHP Variable and Save It in MySQL?

Passing a JS Variable to a PHP Variable

Passing data between JavaScript and PHP can be necessary for various web development scenarios. This article addresses a specific use case where a JavaScript variable needs to be stored in a MySQL database via a PHP script.

Background Scenario

Consider a situation where you obtain a latitude and longitude value from Google Maps in a JavaScript variable named lugar. The objective is to pass this variable to a PHP variable, also named lugar, and subsequently save it in a MySQL database.

JavaScript to PHP Communication

To bridge the gap between JavaScript and PHP, you can utilize jQuery's Ajax function. This approach involves creating two JavaScript scripts.

JavaScript Script for Variable Transmission:

<code class="javascript">$.ajax({
    url: "save.in.my.database.php",
    type: "post",
    dataType:"json",
    data: {
        lugar: results[0].geometry.location
    },
    success: function(data){
        alert('saved');
    },
    error: function(){
        alert('error');
    }
});</code>

PHP Script for Database Interaction:

<code class="php"><?php
if(isset($_POST['lugar'])) {
    // DB connection and operations here
    // ...
}
?></code>

Explanation:

• The first JavaScript script sends an Ajax request to a PHP script named "save.in.my.database.php".
• The data sent includes the lugar variable, which contains the latitude and longitude values.
• The PHP script receives the $_POST['lugar'] variable and handles the necessary database operations.

Conclusion:

By leveraging jQuery's Ajax function and a separate PHP script, it is possible to transfer a JS variable (lugar) to a PHP variable ($lugar) and store its contents in a MySQL database. This technique enables seamless interaction between front-end JavaScript and server-side PHP code for data storage and management.

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