functions.php

Upload image from URL and set as featured image in WordPress

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$image_url  = 'http://henriksson.me/wp-content/themes/henriksson/images/markus-henriksson.jpg';
$upload_dir = wp_upload_dir();
$image_data = file_get_contents($image_url);
$filename   = basename($image_url);
 
if( wp_mkdir_p( $upload_dir['path'] ) ) {
    $file = $upload_dir['path'] . '/' . $filename;
} else {
    $file = $upload_dir['basedir'] . '/' . $filename;
}
 
file_put_contents( $file, $image_data );
 
$wp_filetype = wp_check_filetype( $filename, null );
 
$attachment = array(
    'post_mime_type' => $wp_filetype['type'],
    'post_title'     => sanitize_file_name( $filename ),
    'post_content'   => '',
    'post_status'    => 'inherit'
);
 
$attach_id = wp_insert_attachment( $attachment, $file, $post_id );
 
require_once(ABSPATH . 'wp-admin/includes/image.php');
 
$attach_data = wp_generate_attachment_metadata( $attach_id, $file );
 
wp_update_attachment_metadata( $attach_id, $attach_data );
 
// Set the uploaded image as featured image
set_post_thumbnail( $post_id, $attach_id );

 

Advanced Custom Fields and GIT in WordPress

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Include Advanced Custom Fields or Advanced Custom Fields Pro in your theme and save fields groups as json (pretty awesome). This will allow you to easily version control fields and fieldgroups in GIT. Just move the plugin to your theme folder, rename it to “acf” and create another folder called “acf-fields”. Paste this to your functions.php.

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// Set the path
add_filter('acf/settings/path', 'my_acf_settings_path');
  function my_acf_settings_path( $path ) {
    $path = get_stylesheet_directory() . '/acf/';
    return $path;
}
 
// Set the directory
add_filter('acf/settings/dir', 'my_acf_settings_dir');
  function my_acf_settings_dir( $dir ) {
    $dir = get_stylesheet_directory_uri() . '/acf/';
    return $dir;
}
 
// uncomment this to hide the menu in wp-admin
//add_filter('acf/settings/show_admin', '__return_false');
 
// Include acf in your theme
include_once( get_stylesheet_directory() . '/acf/acf.php' );
 
 
// Save fields groups to file
add_filter('acf/settings/save_json', 'my_acf_json_save_point');
function my_acf_json_save_point( $path ) {
  $path = get_stylesheet_directory() . '/acf-fields/'; // this folder needs to be created first
  return $path;
}
 
// Load field groups from file
add_filter('acf/settings/load_json', 'my_acf_json_load_point');
function my_acf_json_load_point( $paths ) {
  unset($paths[0]);
  $paths[] = get_stylesheet_directory() . '/acf-fields/'; // this folder needs to be created first
  return $paths;
}

 

Replace non-english characters (i.e. å,ä and ö) on file upload in WordPress

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Replace non-english and weird characters in file name on upload in WordPress by adding this to your functions.php.
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add_filter( 'sanitize_file_name', 'extended_sanitize_file_name', 10, 2 );
function extended_sanitize_file_name( $filename ) {
    $sanitized_filename = remove_accents( $filename );
    return $sanitized_filename;
}

Updated. Credits goes to http://annalinneajohansson.com/2013/10/10/rensa-specialtecken-ur-filnamn-vid-uppladdning-i-wordpress/.

Modify ACF post object result to include Polylang language in WordPress admin

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Modify the result in a ACF post object field in WordPress admin by including language slug from Polylang. Instead of having multiple object with the same title (but on different languages), add this to your functions.php. Don’t forget to change “field_name” to what ever your field is called.

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add_filter('acf/fields/post_object/result', 'my_post_object_result', 10, 4);
function my_post_object_result( $result, $object, $field, $post ) {
    global $polylang;
    $language = $polylang->model->get_post_language($object->ID);
    $result .= ' (' . $language->slug . ')';
    return $result;
}
 
add_filter('acf/fields/post_object/result/name=field_name', 'my_post_object_result', 10, 4);

 

Remove menu items for non-administrators in WordPress admin

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Remove menu items for non-administrators in WordPress admin by adding this to your functions.php.

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if(!current_user_can('manage_options')){
    function remove_menus(){
        remove_menu_page( 'index.php' );                  //Dashboard
        remove_menu_page( 'edit.php' );                   //Posts
        remove_menu_page( 'upload.php' );                 //Media
        remove_menu_page( 'edit.php?post_type=page' );    //Pages
        remove_menu_page( 'edit-comments.php' );          //Comments
        remove_menu_page( 'themes.php' );                 //Appearance
        remove_menu_page( 'plugins.php' );                //Plugins
        remove_menu_page( 'users.php' );                  //Users
        remove_menu_page( 'tools.php' );                  //Tools
        remove_menu_page( 'options-general.php' );        //Settings
    }
    add_action( 'admin_menu', 'remove_menus' );
}