数据URI保存的JPG图像在使用php imagecreatefromjpeg上传时会创建黑色图像

Question

I am using following code to upload

//width,new_width,height,new_height are set
$tmp_filename = $_FILES['file']['tmp_name'];
$image_p = imagecreatetruecolor($new_width, $new_height); //resample image          

if(($ext=='jpg') | ($ext=='jpeg')){
    //if image to be uploaded is jpg
    $image = imagecreatefromjpeg($tmp_filename); 
}
else{
    //if image to be uploaded is png
    $image = imagecreatefrompng($tmp_filename);
}

//to convert to jpg
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

$done=imagejpeg($image_p, $output_dirrectory."/".$image_name.".jpg",95); //95% quality

Now, the problem is, when I save a image from any other website which was generated using Data URI, it get saved on my local machine as JPG image. When I try to upload same image with following code, it created black image.

I could't figure out the problem. I hope solution lies in imagecreatefromstring, but I don't know how that will work out with following code? Please suggest any solution?

Answer 1

try adding:

$width = imageSX($image);
$height = imageSY($image);

before the call to imagecopyresampled