What is the best practice for automatically cropping PNG images with a fixed height in PHP?

When automatically cropping PNG images with a fixed height in PHP, you can use the GD library to manipulate the image. The process involves loading the PNG image, calculating the aspect ratio, determining the new width based on the fixed height, cropping the image to the new dimensions, and saving the cropped image. 

// Load the PNG image
$image = imagecreatefrompng('image.png');

// Get the original dimensions
$width = imagesx($image);
$height = imagesy($image);

// Calculate the aspect ratio
$aspectRatio = $width / $height;

// Set the fixed height
$fixedHeight = 200;

// Calculate the new width based on the fixed height
$newWidth = $fixedHeight * $aspectRatio;

// Create a new image with the fixed height
$newImage = imagecreatetruecolor($newWidth, $fixedHeight);

// Crop the image to the new dimensions
imagecopyresampled($newImage, $image, 0, 0, 0, 0, $newWidth, $fixedHeight, $width, $height);

// Save the cropped image
imagepng($newImage, 'cropped_image.png');

// Free up memory
imagedestroy($image);
imagedestroy($newImage);

Keywords

PHP image processing PNG cropping fixed height

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