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$("table").find("td").each(function() {
    var $this = $(this);
    $this.html($this.html().replace(/ /g, ''));
});	

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function the_content_filter($content) {
	// array of custom shortcodes requiring the fix 
	$block = join("|",array("iz_mehr","iz_col", "text_platzhalter"));
	// opening tag
	$rep = preg_replace("/(<p>)?\[($block)(\s[^\]]+)?\](<\/p>|<br \/>)?/","[$2$3]",$content);
		
	// closing tag
	$rep = preg_replace("/(<p>)?\[\/($block)](<\/p>|<br \/>)?/","[/$2]",$rep);
	return $rep;
}

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/**
 * How to get last login time in wordpress
 * https://holisticwp.com/blog/capture-user-last-login-time/705
 *
 */
add_action('wp_login','wpdb_capture_user_last_login', 10, 2);
function wpdb_capture_user_last_login($user_login, $user){
    update_user_meta($user->ID, 'last_login', current_time('mysql'));
}

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/*
 * Adding Favicons to the WordPress Admin & Login Pages
 * http://clarknikdelpowell.com/blog/how-to-use-favicons-on-the-wordpress-admin-login-pages/
 *
 */ 
function add_favicon() {
	$favicon_url = get_stylesheet_directory_uri() . '/favicon.ico';
	echo "\n";	
	echo '<link rel="shortcut icon" href="' . $favicon_url . '" />';
	echo "\n";

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# .htaccess
RewriteEngine On
RewriteBase /
RewriteRule ^(.*)$ http://www.NEUE_DOMAIN.de/$1 [R=301,L]

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/* 
 * Display image file size in media library
 * https://wordpress.stackexchange.com/questions/237131/display-image-file-size-in-media-library
 * 
 */
function wpse_237131_add_column_file_size( $columns ) { // Create the column
    $columns['filesize'] = 'Dateigröße';
    return $columns;
}
function wpse_237131_column_file_size( $column_name, $media_item ) { // Display the file size

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$user = wp_get_current_user();
$allowed_roles = array('editor', 'administrator', 'author');
<?php if( array_intersect($allowed_roles, $user->roles ) ) {  ?> 
   //stuff here for allowed roles
<?php } ?>

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function my_custom_admin_styles() {
   ?>
        <style type="text/css">
          .your-custom-css {
               height: 300px;
               overflow: scroll;
               border: 1px solid #ddd;
               padding: 15px;
           }
         </style>

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function add_theme_caps() {
    $role = get_role( 'author' );
    $role->add_cap( 'edit_others_posts' ); 
}
add_action( 'admin_init', 'add_theme_caps');

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function iz_old_ie_scripts() {
	if (!is_admin()) {
		// Make responsive websites and media queries work in IE8
		// wp_register_script( 'respond', ( '//cdnjs.cloudflare.com/ajax/libs/respond.js/1.4.2/respond.min.js' ), FALSE, NULL, FALSE );
		// wp_script_add_data( 'respond', 'conditional', 'lt IE 9' );
	
		// Support for :nth-child(n), :last-child, etc in IE8
		wp_register_script( 'selectivizr', ( '//cdnjs.cloudflare.com/ajax/libs/selectivizr/1.0.2/selectivizr-min.js' ), array('jquery'), NULL, FALSE );
		wp_script_add_data( 'selectivizr', 'conditional', 'lt IE 9' );	}
	}