PHP Alert

Types of Pop-up Boxes

Pop-up boxes help in interacting with users and providing necessary information. There are three main types:

1. Alert Dialog Box – Displays a message with an 'OK' button.
    
2. Prompt Dialog Box – Takes input from the user.
    
3. Confirm Dialog Box – Asks the user for confirmation before proceeding.
    

Let's discuss each of them in detail with examples.

Alert Dialog Box

An alert box is the simplest type of dialog box. It displays a message to the user & requires them to click "OK" to proceed. This is commonly used to notify users about errors, success messages, or warnings.  

Syntax

<?php
echo "<script>alert('This is an alert box');</script>";
?>

Examples of Using an Alert Dialog Box with PHP

Example 1: Simple Alert Box

<?php
echo "<script>alert('Welcome to Coding Ninjas!');</script>";
?>

You can also try this code with Online PHP Compiler

Run Code

Output: 

A pop-up box appears with the message "Welcome to Coding Ninjas!" and an 'OK' button.

Example 2: Alert on Form Submission

<?php
if(isset($_POST['submit'])) {
    echo "<script>alert('Form Submitted Successfully!');</script>";
}
?>
<form method="post">
    <input type="submit" name="submit" value="Submit Form">
</form>

You can also try this code with Online PHP Compiler

Run Code

Output: 

When the user clicks "Submit Form", an alert appears saying "Form Submitted Successfully!".

Prompt Dialog Box

A prompt box is used to collect input from the user. It displays a message along with a text field where the user can enter data. This is useful for scenarios like updating user details or entering custom values. 

Syntax

<?php
echo "<script>
    var name = prompt('Enter your name:');
    if(name) {
        alert('Hello, ' + name);
    }
</script>";
?>

You can also try this code with Online PHP Compiler

Run Code

Output

Examples Using a Prompt Dialog Box with PHP

Example 1: Taking User Input

<?php
echo "<script>
    var age = prompt('Enter your age:');
    if(age) {
        document.write('You are ' + age + ' years old.');
    }
</script>";
?>

You can also try this code with Online PHP Compiler

Run Code

Output: 

A prompt box appears asking for age. If entered, it displays "You are [age] years old." on the webpage.

Example 2: Prompt with Form Handling

<?php
echo "<script>
    var email = prompt('Enter your email:');
    if(email) {
        document.write('Your email is: ' + email);
    }
</script>";
?>

You can also try this code with Online PHP Compiler

Run Code

Output: 

Asks for an email, then displays "Your email is: [entered email]" on the page.

Confirm Dialog Box

A confirm box is used when you need the user to make a decision. It displays a message along with two buttons: "OK" & "Cancel". Based on the user’s choice, you can execute different actions.  

Syntax

<?php
echo "<script>
    var confirmAction = confirm('Are you sure you want to proceed?');
    if(confirmAction) {
        alert('You chose to proceed.');
    } else {
        alert('You canceled the action.');
    }
</script>";
?>

Examples of Using Confirm Dialog Box with PHP

Example 1: Confirm Before Deleting Data

<?php
echo "<script>
    var confirmDelete = confirm('Do you really want to delete this record?');
    if(confirmDelete) {
        document.write('Record deleted successfully.');
    } else {
        document.write('Deletion canceled.');
    }
</script>";
?>

You can also try this code with Online PHP Compiler

Run Code

Output:

 If the user clicks 'OK', "Record deleted successfully." appears. If 'Cancel' is clicked, "Deletion canceled." is displayed.

Example 2: Confirm on Logout

<?php
echo "<script>
    var logoutConfirm = confirm('Do you want to log out?');
    if(logoutConfirm) {
        window.location.href = 'logout.php';
    }
</script>";
?>

You can also try this code with Online PHP Compiler

Run Code

Output

Output: If 'OK' is clicked, the user is redirected to 'logout.php'. If 'Cancel' is clicked, nothing happens.

Frequently Asked Questions

How can I show an alert in PHP?

PHP does not have a built-in alert function, but you can use JavaScript inside PHP to display alerts using echo "<script>alert('Message');</script>";.

Can we use PHP variables inside an alert box?

Yes, PHP variables can be used inside an alert box by embedding them in JavaScript.

Conclusion

In this article, we learned about PHP Alert and how to display messages using JavaScript, Bootstrap, and PHP itself. Alerts help improve user interaction by providing important notifications or warnings. By using different methods, developers can create dynamic and responsive alerts to enhance the user experience in PHP applications.