Wordpress Snippet - Manage Your Media Only

gistfile1.txt

<?php
/*
Plugin Name: Manage Your Media Only
Description: Show only the author's Media in the edit list
Version: 0.1
License: GPL
*/

//Manage Your Media Only
function mymo_parse_query_useronly( $wp_query ) {
    if ( strpos( $_SERVER[ 'REQUEST_URI' ], '/wp-admin/upload.php' ) !== false ) {
        if ( !current_user_can( 'update_core' ) ) {
            global $current_user;
            $wp_query->set( 'author', $current_user->id );
        }
    }
}

add_filter('parse_query', 'mymo_parse_query_useronly' );

// //restrict authors to only being able to view media that they've uploaded
// function ik_eyes_only( $wp_query ) {
// 	//are we looking at the Media Library or the Posts list?
// 	if ( strpos( $_SERVER[ 'REQUEST_URI' ], '/wp-admin/upload.php' ) !== false
// 	|| strpos( $_SERVER[ 'REQUEST_URI' ], '/wp-admin/edit.php' ) !== false ) {
// 		//user level 5 converts to Editor
// 		if ( !current_user_can( 'level_5' ) ) {
// 			//restrict the query to current user
// 			global $current_user;
// 			$wp_query->set( 'author', $current_user->id );
// 		}
// 	}
// }

// //filter media library & posts list for authors
// add_filter('parse_query', 'ik_eyes_only' );

add_action('pre_get_posts','ml_restrict_media_library');

function ml_restrict_media_library( $wp_query_obj ) {
    global $current_user, $pagenow;
    if( !is_a( $current_user, 'WP_User') )
    return;
    if( 'admin-ajax.php' != $pagenow || $_REQUEST['action'] != 'query-attachments' )
    return;
    if( !current_user_can('manage_media_library') )
    $wp_query_obj->set('author', $current_user->ID );
    return;
}