Simple POST Request to get the Address and City So the Output for this will be something like: If any condition is there that is checked or else the data is collected. Here the htmlspecialchars($Request) takes the value of Input Field and checks whether any condition is given over there or not. We are trying to create a FORM that takes Input as the Name, a request is submitted from the method POST with certain details and the data is collected by the Request Method. Let’s start by creating an HTML form and see how the Request Generates. Let us see some functioning of $_POST with some Example: Example #1 Localhost/pagename.php Examples of PHP $_POST So after the URL is Hit the URL will be something like that with the POST Method: The Post method is used for creating complex Form in HTML and to handle complex data are sent over the network. And since the Values are not visible the result cannot be book marked. The time spent by method POST is more than that of the other request that is why it has some what low performance, But it is widely used as the exposure for this is more as it supports many data types such as String, numeric, binary. _POST is an array of variable passed to script via the HTTP Post Method. The data sent by the POST Method is invisible to others and we cannot see any form of data when passed on. The data is then passed with some security protocol making the information secured and then sent to an associative array using the $_POST method. Both Binary, as well as ASCII data, can be sent of with the POST method. It doesn’t have the limit of data size to be sent in this QUERY_STRING. Once we get the encoded data it is sent to a header called QUERY_STRING. All the special characters are removed and the data is encoded. The Information is encoded using a scheme where the KEY/VALUE pairs are joined with an equal sign. The Post Method transfers the information via the Headers. When a user fills the data in a PHP form and submits the data that is sent can be collected with the _POST Method in PHP. What this superglobal does is that it returns the filename of the current webpage, which then acts as the action script.īut as this returns the existing filename from the URL, you must be a little careful because users may inject some unwanted code from the URL, so to avoid it, we can use the htmlspecialchars() function to convert any special character in the string(URL in this case) into HTML entities.The $_POST variable collects the data from the HTML form via the POST method. In such scenarios, we will have to submit the form to the same webpage again, and we can use $_SERVER as the form action. Sometimes we can avoid having an extra PHP file to handle/process the form-data and can include the PHP code in the file with the HTML form itself. You can even add more validations like checking the input for malicious codes like tags using regular expressions. If you have email address field, we suggest you validate it. For example, if you don't have any mandatory fields in your form, then you don't have to worry about checking whether the submitted values are empty or not. Validating a form in PHP depends on your requirements too. The filter_var() function returns true for a valid email address and returns false for an invalid email address. The function is filter_var($email, FILTER_VALIDATE_EMAIL), let's see how it works. To validate email address, there is a special function available in PHP which we can use to validate email addresses. In the code above we are checking whether the user has entered name value in the form or not, similarly you can put a check on all the mandatory form fields. Now we will learn some basic validations that can be easily applied to the submitted form-data to validate it before performing any action on it. To tackle with it, it's good to put some validations in the PHP code for validating the user inputs submitted in the form-data. Įasy, right? Yes, to access the form-data for different types of HTML form elements, all you need is $_POST.īut an HTML form is a great entry point for hackers to play around by entering script or some malicious code into the input fields to cause some error/issue in your PHP script. In the above form we are asking the user for 4 different inputs, let's see how we can fetch the submitted values for the fields in PHP. We will be creating an HTML form with 2 text fields for name and email, 1 textarea for the user to provide a self-description(more like about me) and a radio button set for asking the user's gender.īelow we have the HTML code for the form. We will also learn some useful tips that can be utilized while processing the form-data like checking for empty input values, validating fields etc. In this tutorial, we will create a simple HTML form with different types of inputs and then write PHP code for processing the form-data when submitted.
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