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January 28, 2023 03:57
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WordPress plugin that allow to use an external image url as featured image.
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<?php namespace GM\WWWPostThumbnail; | |
/** | |
* Plugin Name: WWW Post Thumbnail | |
* Description: Allow to use an external image url as featured image. | |
* Plugin URI: https://gist.github.com/Giuseppe-Mazzapica/928bc22e5f49a654cf7c | |
* Author: Giuseppe Mazzapica | |
* Author URI: https://github.com/Giuseppe-Mazzapica | |
* License: MIT | |
* Version: 0.1.0 | |
* | |
*/ | |
/* | |
MIT License (MIT) | |
Copyright (c) 2014 Giuseppe Mazzapica | |
Permission is hereby granted, free of charge, to any person obtaining a copy | |
of this software and associated documentation files (the "Software"), to deal | |
in the Software without restriction, including without limitation the rights | |
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
copies of the Software, and to permit persons to whom the Software is | |
furnished to do so, subject to the following conditions: | |
The above copyright notice and this permission notice shall be included in | |
all copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
THE SOFTWARE. | |
*/ | |
add_action( 'plugins_loaded', 'GM\WWWPostThumbnail\txtdomain' ); | |
function txtdomain() { | |
load_plugin_textdomain( 'www-post-thumb', FALSE, dirname( plugin_basename( __FILE__ ) ) . '/' ); | |
} | |
add_filter( 'admin_post_thumbnail_html', 'GM\WWWPostThumbnail\field' ); | |
add_action( 'save_post', 'GM\WWWPostThumbnail\save', 10, 2 ); | |
add_filter( 'post_thumbnail_html', 'GM\WWWPostThumbnail\markup', 10, PHP_INT_MAX ); | |
function is_image( $url ) { | |
$ext = array( 'jpeg', 'jpg', 'gif', 'png' ); | |
$info = (array) pathinfo( parse_url( $url, PHP_URL_PATH ) ); | |
return isset( $info['extension'] ) && in_array( strtolower( $info['extension'] ), $ext, TRUE ); | |
} | |
function field( $html ) { | |
global $post; | |
$value = get_post_meta( $post->ID, '_thumbnail_ext_url', TRUE ) ? : ""; | |
$nonce = wp_create_nonce( 'thumbnail_ext_url_' . $post->ID . get_current_blog_id() ); | |
$html .= '<input type="hidden" name="thumbnail_ext_url_nonce" value="' . esc_attr( $nonce ) . '">'; | |
$html .= '<div><p>' . __('Or', 'www-post-thumb') . '</p>'; | |
$html .= '<p>' . __( 'Enter the url for external featured image', 'www-post-thumb' ) . '</p>'; | |
$html .= '<p><input type="url" name="thumbnail_ext_url" value="' . $value . '"></p>'; | |
if ( ! empty($value) && is_image( $value ) ) { | |
$html .= '<p><img style="max-width:150px;height:auto;" src="' . esc_url($value) . '"></p>'; | |
$html .= '<p>' . __( 'Leave url blank to remove.', 'www-post-thumb' ) . '</p>'; | |
} | |
$html .= '</div>'; | |
return $html; | |
} | |
function save( $pid, $post ) { | |
$cap = $post->post_type === 'page' ? 'edit_page' : 'edit_post'; | |
if ( | |
! current_user_can( $cap, $pid ) | |
|| ! post_type_supports( $post->post_type, 'thumbnail' ) | |
|| defined( 'DOING_AUTOSAVE' ) | |
) { | |
return; | |
} | |
$action = 'thumbnail_ext_url_' . $pid . get_current_blog_id(); | |
$nonce = filter_input( INPUT_POST, 'thumbnail_ext_url_nonce', FILTER_SANITIZE_STRING ); | |
$url = filter_input( INPUT_POST, 'thumbnail_ext_url', FILTER_VALIDATE_URL ); | |
if ( | |
empty( $nonce ) | |
|| ! wp_verify_nonce( $nonce, $action ) | |
|| ( ! empty( $url ) && ! is_image( $url ) ) | |
) { | |
return; | |
} | |
if ( ! empty( $url ) ) { | |
update_post_meta( $pid, '_thumbnail_ext_url', esc_url($url) ); | |
if ( ! get_post_meta( $pid, '_thumbnail_id', TRUE ) ) { | |
update_post_meta( $pid, '_thumbnail_id', 'by_url' ); | |
} | |
} elseif ( get_post_meta( $pid, '_thumbnail_ext_url', TRUE ) ) { | |
delete_post_meta( $pid, '_thumbnail_ext_url' ); | |
if ( get_post_meta( $pid, '_thumbnail_id', TRUE ) === 'by_url' ) { | |
delete_post_meta( $pid, '_thumbnail_id' ); | |
} | |
} | |
} | |
function markup( $html, $post_id ) { | |
$url = get_post_meta( $post_id, '_thumbnail_ext_url', TRUE ); | |
if ( empty( $url ) || ! is_image( $url ) ) { | |
return $html; | |
} | |
$alt = get_post_field( 'post_title', $post_id ) . ' ' . __( 'thumbnail', 'www-post-thumb' ); | |
$attr = array( 'alt' => $alt ); | |
$attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, NULL ); | |
$attr = array_map( 'esc_attr', $attr ); | |
$html = sprintf( '<img src="%s"', esc_url($url) ); | |
foreach ( $attr as $name => $value ) { | |
$html .= " $name=" . '"' . $value . '"'; | |
} | |
$html .= ' />'; | |
return $html; | |
} |
I had hopes for this gist...
Does this have an automatic update?
Hey Giuseppe. Any chance you can update this plugin? It looks exactly what I need... Thanks.
Hi @gmazzap, can you pease make this work for WooCommerce? Thank you!!!
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seems that it doese not work now for wp 5