How to set aspect ratio in below code using PHP - php

Question

I tried 2 implementations, shown below. Both are working well but when I tried to mix them it is not working anymore.
$output['status']=FALSE;
set_time_limit(0);
$allowedImageType = array("image/gif", "image/jpeg", "image/pjpeg", "image/png", "image/x-png" );
if ($_FILES['image_file_input']["error"] > 0) {
$output['error']= "File Error";
}
elseif (!in_array($_FILES['image_file_input']["type"], $allowedImageType)) {
$output['error']= "Invalid image format";
}
elseif (round($_FILES['image_file_input']["size"] / 1024) > 4096) {
$output['error']= "Maximum file upload size is exceeded";
} else {
$temp_path = $_FILES['image_file_input']['tmp_name'];
$file = pathinfo($_FILES['image_file_input']['name']);
$fileType = $file["extension"];
$photo_name = $productname.'-'.$member_id."_".time();
$fileName1 = $photo_name . '-125x125' . ".jpg";
$fileName2 = $photo_name . '-250x250' . ".jpg";
$fileName3 = $photo_name . '-500x500' . ".jpg";
$small_thumbnail_path = "uploads/large/";
createFolder($small_thumbnail_path);
$small_thumbnail = $small_thumbnail_path . $fileName1;
$medium_thumbnail_path = "uploads/large/";
createFolder($medium_thumbnail_path);
$medium_thumbnail = $medium_thumbnail_path . $fileName2;
$large_thumbnail_path = "uploads/large/";
createFolder($large_thumbnail_path);
$large_thumbnail = $large_thumbnail_path . $fileName3;
$thumb1 = createThumbnail($temp_path, $small_thumbnail,$fileType, 125, 125 );
$thumb2 = createThumbnail($temp_path, $medium_thumbnail, $fileType, 250, 250);
$thumb3 = createThumbnail($temp_path, $large_thumbnail,$fileType, 500, 500);
if($thumb1 && $thumb2 && $thumb3) {
$output['status']=TRUE;
$output['small']= $small_thumbnail;
$output['medium']= $medium_thumbnail;
$output['large']= $large_thumbnail;
}
}
echo json_encode($output);
Function File
function createFolder($path)
{
if (!file_exists($path)) {
mkdir($path, 0755, TRUE);
}
}
function createThumbnail($sourcePath, $targetPath, $file_type, $thumbWidth, $thumbHeight){
$source = imagecreatefromjpeg($sourcePath);
$width = imagesx($source);
$height = imagesy($source);
$tnumbImage = imagecreatetruecolor($thumbWidth, $thumbHeight);
imagecopyresampled($tnumbImage, $source, 0, 0, 0, 0, $thumbWidth, $thumbHeight, $width, $height);
if (imagejpeg($tnumbImage, $targetPath, 90)) {
imagedestroy($tnumbImage);
imagedestroy($source);
return TRUE;
} else {
return FALSE;
}
}
Aspect ratio code, which is another one I tried to mix this code. But I was unsuccessful
$fn = $_FILES['image']['tmp_name'];
$size = getimagesize($fn);
$ratio = $size[0]/$size[1]; // width/height
$photo_name = $productname.'-'.$member_id."_".time();
{
if( $ratio > 1) {
$width1 = 500;
$height1 = 500/$ratio;
}
else {
$width1 = 500*$ratio;
$height1 = 500;
}
$src = imagecreatefromstring(file_get_contents($fn));
$dst = imagecreatetruecolor($width1,$height1);
$fileName3 = $photo_name . '-500x500' . ".jpg";
imagecopyresampled($dst,$src,0,0,0,0,$width1,$height1,$size[0],$size[1]);
imagedestroy($src);
imagepng($dst,$fileName3); // adjust format as needed
imagedestroy($dst);
if( $ratio > 1) {
$width2 = 250;
$height2 = 250/$ratio;
}
else {
$width2 = 250*$ratio;
$height2 = 250;
}
$src = imagecreatefromstring(file_get_contents($fn));
$dst = imagecreatetruecolor($width2,$height2);
$fileName2 = $photo_name . '-250x250' . ".jpg";
imagecopyresampled($dst,$src,0,0,0,0,$width2,$height2,$size[0],$size[1]);
imagedestroy($src);
imagepng($dst,$fileName2); // adjust format as needed
imagedestroy($dst);
}
What I need is to save my image after resizing but in second code there is no condition check, and I can't get image upload folder path. That's why I need to merge these 2 codes.
Basically I need need to save my image in 3 size formats: 500x500,250x250 and 125x125. Width is fixed, but height is set as per aspect ratio and set upload folder and condition in second code block.

Answer 1

Try this thumbnail function, which takes your source image resource and thumbnail size, and returns a new image resource for the thumbnail.
function createThumbnail($src, int $width = 100, int $height = null) {
// Ensure that src is a valid gd resource
if (!(is_resource($src) && 'gd' === get_resource_type($src))) {
throw new InvalidArgumentException(
sprintf("Argument 1 of %s expected type resource(gd), %s supplied", __FUNCTION__, gettype($src))
);
}
// Extract source image width, height and aspect ratio
$source_width = imagesx($src);
$source_height = imagesy($src);
$ratio = $source_width / $source_height;
// We know that width is always supplied, and that height can be null
// We must solve height according to aspect ratio if null is supplied
if (null === $height) {
$height = round($width / $ratio);
}
// Create the thumbnail resampled resource
$thumb = imagecreatetruecolor($width, $height);
imagecopyresampled($thumb, $src, 0, 0, 0, 0, $width, $height, $source_width, $source_height);
return $thumb;
}
Given your code above, you can now use the function like this
// Get uploaded file information as you have
// Create your source resource as you have
$source = imagecreatefromstring(file_get_contents($fn));
// Create thumbnails and save + destroy
$thumb = createThumbnail($source, 500);
imagejpeg($thumb, $thumb500TargetPath, 90);
imagedestroy($thumb);
$thumb = createThumbnail($source, 250);
imagejpeg($thumb, $thumb250TargetPath, 90);
imagedestroy($thumb);
$thumb = createThumbnail($source, 125);
imagejpeg($thumb, $thumb125TargetPath, 90);
imagedestroy($thumb);
// Don't forget to destroy the source resource
imagedestroy($source);