File Upload

How to add a file uploads function to a webpage in HTML?

In this article, we will walk you through the process of adding a file upload function to your webpage. We will show you how to create an HTML form with a file input field, as well as how to create a script that handles the file upload process.

Approaches

Two approaches that we can use to add a file upload function to our webpage in HTML are as follows −

Let us discuss them in detail now.

Approach 1: Using a basic HTML form with a file input field

This method involves creating a simple HTML form with a file input field that allows users to select a file to upload. The form is then sent to a server-side script that handles the actual saving of the file.

Step 1 − Create a file called index.html.

Step 2 − Create an HTML form with a file input field.

Example

Let us understand this better through an example.

     
Welcome to Tutorials Point
  

This will create an HTML form with a file input field that allows the user to select a file to upload, and a submit button to send the form. The action attribute is set to «upload.php», which is the server-side script that will handle the file upload. The enctype attribute is set to «multipart/form-data», which is necessary for file uploads.

Step 3 − Create the server-side PHP script (action.php) to handle the file upload.

 if($file_size > 2097152) < $errors[]='File size must be excately 2 MB'; >if(empty($errors)==true) < move_uploaded_file($file_tmp,"upload/".$file_name); echo "Success"; >else < print_r($errors); >> ?>

This script first checks whether the file input field contains a file using the isset function and the $ _FILES superglobal. The script then checks the file size and file extension using the in_array function and a pre-defined list of allowed file extensions. If the file is valid, it is moved to the «upload» directory on the server using the move_uploaded_file function. If the file is not valid, an error message is displayed.

Approach 2: Using jQuery and ajax

This method is a more advanced method of handling file uploads, and allows you to handle the file upload process without having to refresh the page.

Step 1 − Create a file called index.html

Step 2 − Include jQuery and jQuery Form Plugin in this file −

Example

Let us understand this better through an example.

This step involves including the jQuery and jQuery Form Plugin libraries in your HTML document. These libraries will allow you to use the ajaxForm method to handle the file upload process via JavaScript.

Step 3 − Create an HTML form with a file input field −

This step is similar to step 1 of method 1. You create an HTML form with a file input field, and a submit button, and set the action attribute to point to the server-side script that will handle the file upload, and the enctype attribute to «multipart/form-data» as it is necessary for file uploads.

Step 4 − Use jQuery to handle the file upload −

$(document).ready(function() < $('#fileUploadForm').ajaxForm(< beforeSubmit: function()< // do validation here var fileInput = document.getElementById('fileInput'); var file = fileInput.files[0]; var maxFileSize = 2097152; // 2 MB var validFileExtensions = ["jpg", "jpeg", "png"]; var extension = file.name.split('.').pop().toLowerCase(); if(file.size >maxFileSize) < alert("File size must be exactly 2 MB."); return false; >if(validFileExtensions.indexOf(extension) === -1) < alert("Invalid file type. Only JPEG and PNG files are allowed."); return false; >>, success: function(response)< // handle response var jsonResponse = JSON.parse(response); if(jsonResponse.status === "success")< alert("File upload successful!"); >else < alert("File upload failed. Please try again."); >>, error: function(response) < // handle errors alert("There was an error while uploading the file. Please try again later."); >>); >);

This step involves using jQuery to handle the file upload process. The ajaxForm method is used to submit the form via JavaScript, and the beforeSubmit, success, and error functions are used to handle the various stages of the file upload process.

The beforeSubmit function is used to validate the file before uploading, and the success function is used to handle the server’s response after the file is uploaded. The error function is used to handle any errors that occur during the file upload process.

Step 5 − Complete HTML with jQuery code for the index.html file is here −

Example

      
Greetings from Tutorials Point!
      

Step 6 − Create the PHP server-side script (upload.php) to handle the file upload −

 if($file_size > 2097152) < $errors[]='File size must be excately 2 MB'; >if(empty($errors)==true) < move_uploaded_file($file_tmp,"upload/".$file_name); echo "Success"; >else < print_r($errors); >> ?>

This script first checks whether the file input field contains a file using the isset function and the $_FILES superglobal. The script then checks the file size and file extension using the in_array function and a pre-defined list of allowed file extensions. If the file is valid, it is moved to the «upload» directory on the server using the move_uploaded_file.

Conclusion

In this article, we have discussed two approaches to adding a file upload function to a webpage in HTML. The first method is using a basic HTML form with a file input field, the form is then sent to a server-side script that handles the actual saving of the file. The second method is using jQuery and ajax, this method allows you to handle the file upload process without having to refresh the page.

Both methods require proper validation, a proper way of storing the file, with the right permissions on the server side, and also a proper way of sanitizing file names and extensions for security reasons.

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How to create a file upload form

In this blog post, we will walk you through on how to set up a single and multiple file upload support to your HTML forms by using Getform.

Mertcan Yücel

Mertcan Yücel

While handling your forms, adding a file upload capability is one of the most useful use-cases that you might need. Your requirement is simple; you have created your HTML form and want to accept file attachments with the information submitted to your form. For example, it could be a job application form that you want to collect applicant resumes along with their photos or just a simple contact form where you accept any file attachment based on your need.

Most of the form builders such as Google Forms don’t have an easy setup for form uploads. But with Getform, it’s really easy to handle file uploads on your HTML forms. In this post, we will walk you through on how to set up a single and multiple file upload support to your HTML forms.

How to create a file upload form in HTML

Let’s start setting up our file upload form.

1- Create a Getform account

If you haven’t created one already, sign up for Getform. It is so easy to get started and free to register. You don’t need to provide any credit card info to create an account.

2- Create a new form on Getform

After you log in to your Getform account, click to “+” button on your dashboard to create a new form then name it as e.g. “File Upload Form” as follows:

With that form created, our unique form endpoint is now ready to be inserted to our HTML.

3- Create your HTML for your file upload form

You can use the boilerplate code provided on Getform to create your HTML form with file upload capability. It is a basic contact form with name, email, message and a file field. Here is HTML Form Upload Example:

    Send 
 

Extra parts we are adding to our form are «enctype=»multipart/form-data» and » than the usual form created on Getform. These additions will ensure the files are submitted along with the submissions sent to your forms.

4- Paste the endpoint URL that you obtained in step 2 to the action field of your HTML form tag.

Change the action part of your tag in your Hugo template, to use the form endpoint URL you copied in step 2.

The part of the endpoint URL will appear for your form is highlighted in bold. After we add our unique endpoint and with a little bit of styling, here is how our form looks like:

5- Send a new form submission with file attachment

Let’s fill out the form fields, upload a photo and send a new submission to our form:

That’s it! The photo we have added has been correctly submitted with our submission.

6- Upload multiple files to your form

What if you need to send more than one file with your submission? You can add more than one input type=»file» to your HTML to accept multiple file uploads to your form. Here is the HTML syntax to do that:

     Send 
 

Important: While using more than input field for your files, don’t forget to give a different name to each file input field

7.Bonus: Setup a HTML5 multiple file upload

In addition to what we have shown in the 6th step, there is another way to upload multiple files to your forms with a single input. multiple (another usage is multiple=»multiple») keyword that has been introduced with HTML5 helps us to upload more than one file from the single field. Here is the HTML syntax to do that:

    Send 
 

Please note that on Getform, you can accept up to 25MB and up to 5 files per submission.

We hope you enjoyed this post! Let us know if you need further assistance. We are always here to help.

If you have any further queries, reach us out at info@getform.io.

Mertcan from Getform
Easy form endpoints for your forms.

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