如何在文件中保存图像？

Question

On my page I use a script to get a new image:

    $targ_w = $targ_h = 150;
    $jpeg_quality = 90;

    $src = $_POST['image'];
    $img_r = imagecreatefromjpeg($src);
    $dst_r = ImageCreateTrueColor( $targ_w, $targ_h );

    imagecopyresampled($dst_r,$img_r,0,0,$_POST['x'],$_POST['y'],
    $targ_w,$targ_h,$_POST['w'],$_POST['h']);

    header('Content-type: image/jpeg');
    imagejpeg($dst_r,null,$jpeg_quality);

Currently, the script receives $_POST data, extracts an image from it, then displays that image back to the user.

Now I would like to add logic to save the image in a file, but I don't know how to go about it. Any hints will be appreciated.

Answer 1

You need:

imagejpeg($dst_r, "filename", $jpeg_quality);

---

Check the manual of imagejpeg().

bool imagejpeg ( resource $image [, string $filename [, int $quality ]] )

filename

The path to save the file to. If not set or NULL, the raw image stream will be outputted directly.

To skip this argument in order to provide the quality parameter, use NULL.