wordpress gallery images

The following code is in php use to upload images into the wordpress gallery.
if( !empty($_FILES['gallery_image'])){

 add_post_meta($property_id, 'REAL_HOMES_property_images', $uploaded_file_id);*/

 $files = $_FILES['gallery_image'];
 foreach ($files['name'] as $key => $value) {
  if ($files['name'][$key]) {
   $file = array(
     'name' => $files['name'][$key],
     'type' => $files['type'][$key],
     'tmp_name' => $files['tmp_name'][$key],
     'error' => $files['error'][$key],
     'size' => $files['size'][$key]
     );

   $_FILES = array("gallery_image" => $file);

   foreach ($_FILES as $file => $array) {

    $uploaded_file_id = insert_attachment( $file, $property_id );

    add_post_meta($property_id, 'REAL_HOMES_property_images', $uploaded_file_id);
   }
  }
 }
        
}

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But instead of uploading images from my computer, I have to enter the image url. The code needs to get the image from the url and save it as same above. How can I alter the above code to do that??
karthik80cAsked:
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Ray PaseurCommented:
"File upload" is a term of art in web development.  It means copying a file from your client computer to the server via the HTTP post method.  What you probably want to do is use PHP file_get_contents() to read images from another server.  It's a completely different process from file uploads.  I don't know WP well enough to advise you exactly how to do this in the "WordPress way" but I can describe the general design.

1. Your server puts up an HTML document with a form containing a text input control
2. The client pastes a URL in there
3. On submit, your server reads the file from the URL that is posted, and writes the results (if any) into a directory on your server, using the "basename" of the URL as the local file name.
4. Then you can create a URL to the file on your server and use the URL in <img> tags, etc.

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