Resize image to maximum width or height in PHP without cropping

php

Solution

You can use php GD library for this. Inside your if condition after rename function you can write this code:

list($width, $height) = getimagesize($file);
$ratio = $width / $height;
if( $ratio > 1) {
    $resized_width = 500; //suppose 500 is max width or height
    $resized_height = 500/$ratio;
}
else {
    $resized_width = 500*$ratio;
    $resized_height = 500;
}

    if ($imageFileType == 'png') {
        $image = imagecreatefrompng($newfile);
    } else if ($imageFileType == 'gif') {
        $image = imagecreatefromgif($newfile);
    } else {
        $image = imagecreatefromjpeg($newfile);
    }

$resized_image = imagecreatetruecolor($resized_width, $resized_height);
imagecopyresampled($resized_image, $image, 0, 0, 0, 0, $resized_width, $resized_height, $width, $height);

Problem

I have an AJAX form that sends 4 pictures to and PHP form handler. The accepted formats are .gif, .png, .jpg or .jpeg. I am checking the image file type using javascript before sending the form. Now, in PHP I have this code: ``` while($x <= 4) { $target_dir = "files/"; $target_file = $target_dir . basename($_FILES["fileUpload".$x]["name"]); $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION); if (move_uploaded_file($_FILES["fileUpload".$x]["tmp_name"], $target_file)) { $filename = date("d-m-Y---H-i-s---").rand(10000,99999); $oldfile = $target_file; $newfile = $target_dir . $filename . "." . $imageFileType; rename($oldfile, $newfile); $file[$x] = $filename . "." . $imageFileType; $fileCounter++; } $x++; } ``` Some people will upload large image files and I want to automatically resize them to a maximum width/height without cropping the image. How can I do that using PHP?

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