However, mixing PHP & HTML is not always a good practice. And if the $_SERVER is POST, you process it. If the $_SERVER is GET, you show the form. To create a self-processing form, you can use the $_SERVER that returns the request method e.g., GET or POST.
This form is often referred to as a self-processing form. Sometimes, you want to include both form and logic for handling form submission in a single PHP file.
#Form actio how to#
Note that we will also show you how to sanitize and validate form data in the next tutorial.
#Form actio code#
The following shows the code of the subscribe.php file:Įcho "Please confirm it in your inbox of the email $email." Įcho 'You need to provide your name and email address.' Therefore, it’s mandatory to implement server-side validation. However, it doesn’t prevent malicious users from entering bad data that potentially harm the application. The client-side validation’s purpose is to help legitimate users to enter data in the correct format. However, you should never rely on client-side validation as a security measure. To validate data on the client-side, you can use either HTML5 form validation or JavaScript validation. This is known as client-side form validation. It has two input elements with type text and email.īefore submitting the form to the server, the web browser checks if all required fields are filled out, in the correct format. The form uses the POST method and submits the data to the subscribe.php page. PHP Form Demo Name: Email: Subscribe Code language: HTML, XML ( xml ) To check if the form data contains the email, you use the isset() like this: If the form doesn’t have an email input, the $_POST won’t have any element with the key 'email'. After submitting the form, you can access the form data via the associative array $_POST in PHP.įor example, if a form has an input element with the name email, you can access the email value in PHP via the $_POST. If a form uses the POST method, the web browser will include the form data in the HTTP request’s body. The name attribute will be used for accessing the value in PHP.
The input elements are often called form fields.Īn input element has the following important attributes name, type, and value. Typically, a form has one or more input elements including text, password, checkbox, radio button, select, file upload, etc. If you don’t specify the method attribute, the form element will use the get method by default. It means that you can use either post or POST.
In this example, the form method is post. The most commonly used form methods are POST and GET.
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