Do you have heavy image files in your application? And do you want to optimize them before pushing them into application directory? This PHP compress image code will help you to optimize images before upload.

The compressed images are scaled down from the original by quality and size. This process makes your media library lightweight and optimized.

This article uses PHP GD functions to implement image compression. It uses the functions imagecreatefromjpeg(), imagejpeg() to resize the images.

We are going to see a quick example and a featured example in PHP to achieve this.

It is a two-step process that this example code performs PHP compress image.

In the second step, it accepts the source image identifier and the target quality. It also accepts the name of the output file in which the compressed version will be.

It has the least possible number of lines shown below.

It optimizes the source and outputs resized images with the specified quality.

There are alternative functions under different PHP extensions to implement image compress. The following PHP ImageMagick functions are used to do this.

If you are looking for PHP AJAX image upload, refer the linked earlier written article. This example gives more features on PHP compress image compared to the above code. Some of those features are,

This will be useful for embedding to an application with these additional handlings. Refer this earlier article if you are looking for PHP AJAX image upload.

This screenshot shows the file structure of a simple PHP compress image example. It contains structured files and is easy to understand.

This section describes the steps to set up this example in a development environment.

Import this SQL script into your database table. It creates a tbl_image table to run this example. It will have the image name and its path on upload.

It also adds the index for primary key settings and auto_increament flag settings.

sql/structure.sql

This code displays the HTML form with the option to upload the image. The HTML accept attribute limits the file type to allow only images to choose from.

The form-submit action calls the JavaScript validation. It ensures that the file input is not empty.

It targets the endpoint to optimize images by the compressing process. After a successful PHP compress image process, it shows a preview of the image.

index.php (Image upload Form HTML)

This PHP model class has functions to perform the following.

The PHP image insertion function sets a target to place the uploaded image path.

The compressImage() function is used to compress the uploaded file. The main focus of this process is to optimize the image quality.

lib/ImageModel.php

The below screenshot shows the output of this PHP compress image example. It displays a choose file option to upload an image via an HTML form.

It shows a preview of the uploaded image after form submission.

There are some scenarios that need to have media files in optimal quality. In such cases, this PHP compress image utility will be useful to have lightweight images.

I hope, it is useful for you to learn the PHP compress image process. We have seen the purpose and the necessity of this job in a PHP application.

The use case scenarios discussed above justify the importance of having compressed images.

The examples we have seen may help to know the steps to implement. It will make you create your own image file util to do PHP compress image action.Download

Hello there, Vincy.Thanks for tutorial. Howbeit the code makes a double insertion in the table. How do I resolve this, please.

Hi Brian,

Is it due to double click fo the submit button?

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