By Resize an Image using PHP
In this tutorial, you will learn how to resize an image using PHP. Image resizing is a common task in web development and PHP provides several libraries such as GD and ImageMagick that make it easy to manipulate images. We’ll cover the basics of image resizing. With this knowledge, you’ll be able to resize images on your website using PHP and make sure they look great on any device. Follow our step-by-step guide to resize images in PHP today!
To Resize an Image using PHP, you can use the built-in GD library which provides various image manipulation functions. Here’s an example code snippet that demonstrates how to resize an image:
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// Load the image and get its dimensions $original_image = imagecreatefromjpeg('path/to/your/image.jpg'); $original_width = imagesx($original_image); $original_height = imagesy($original_image); // Calculate the new dimensions $new_width = 500; $new_height = ($original_height / $original_width) * $new_width; // Create a new image with the new dimensions $resized_image = imagecreatetruecolor($new_width, $new_height); // Resize the original image to the new dimensions imagecopyresampled($resized_image, $original_image, 0, 0, 0, 0, $new_width, $new_height, $original_width, $original_height); // Save the resized image imagejpeg($resized_image, 'path/to/your/resized/image.jpg'); // Free up memory imagedestroy($original_image); imagedestroy($resized_image); |
In this example to Resize an Image using PHP, we load the original image using the imagecreatefromjpeg() function and get its dimensions using imagesx() and imagesy(). We then calculate the new dimensions based on a desired width and aspect ratio, and create a new image using imagecreatetruecolor().
To resize the original image to the new dimensions, we use imagecopyresampled(), which resamples the image using a bilinear interpolation algorithm. Finally, we save the resized image using imagejpeg() and free up memory using imagedestroy().
Note that this example code is specifically for JPEG images. If you’re working with a different file format, you’ll need to use a different function to load and save the image.
Related Links:
- PHP documentation on image resizing – https://www.php.net/manual/en/book.image.php
- GD Library – https://libgd.github.io/
- ImageMagick – https://imagemagick.org/script/index.php
- Intervention Image – http://image.intervention.io/
- PHP Image Processing and GD – https://www.w3schools.com/php/php_ref_image.asp
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