ID ) ) {
$data = isset( $_POST[$field_id] ) && !empty( $_POST[$field_id] ) ? $_POST[$field_id] : '';
$data_org = get_post_meta( $post->ID, $field_id );
if( $field_id === 'change-canonical' ) {
if( $data === wp_get_canonical_url() || $data === get_post_permalink() ) $data = '';
}
if( !empty( $data ) && empty( $data_org ) ) {
/* 保存 */
add_post_meta( $post->ID, $field_id, $data, true );
}
elseif( !empty( $data ) && $data !== $data_org ) {
/* 更新 */
update_post_meta( $post->ID, $field_id, $data );
}
else {
/* 削除 */
delete_post_meta( $post->ID, $field_id );
}
}
});
}
endif;
/*---------------------------------------------------------------------------
* addhead
*---------------------------------------------------------------------------*/
/* 投稿画面に表示するフォーム */
if( function_exists( 'og_image_meta_box' ) === false ):
function addhead_meta_box() {
global $post;
$addhead = get_post_meta( $post->ID, 'addhead', true );
?>
ID, 'change-description', true );
?>
ID, 'add-keywords', true );
?>
ID, 'change-canonical', true );
if( empty( $change_url ) ) {
if( get_post_status( $post->ID ) === 'publish') {
$change_url = wp_get_canonical_url();
}
else {
$change_url = get_post_permalink();
}
}
?>
ID, 'amp-custom', true );
?>
ID, 'og_img', true );
$post_thumbnail = has_post_thumbnail();
$cont = $post->post_content;
$preg = '//i';
if( !empty( $og_image ) ) {
$image = get_post_meta( $post->ID, 'og_img', true );
}
elseif( !empty( $post_thumbnail ) ) {
$img_id = get_post_thumbnail_id();
$img_arr = wp_get_attachment_image_src( $img_id, 'full');
$image = $img_arr[0];
}
elseif( preg_match( $preg, $cont, $img_url ) ) {
$image = $img_url[2];
}
?>