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Wordpress Trick: Hide Admin Panels From Specific User Roles

    16:35 on March 09th, 2010 wordpress, wordpress-tricks

When you’re building a Wordpress website for a client, sometimes you’ll want to hide certain admin panels from specific user roles; do editors really need “custom fields”? Drop the following code into your functions.php file to hide the Custom Fields meta-box from editors.

function hide_meta_boxes() {
     remove_meta_box('postcustom','post','normal');
     remove_meta_box('postcustom','page','normal');
}
 
if (!current_user_can('manage_options')) {
	add_action('admin_init','hide_meta_boxes');
}

The remove_meta_box function takes three parameters. 1: the div ID of the box you want to hide, the context (post or page) and position (normal or advanced).

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Wordpress Trick: Google MP3 Player Shortcode

    16:59 wordpress, wordpress-tricks

Here’s another Wordpress shortcode which is quite useful. It piggybacks on Googles excellent Flash-based MP3 player (the one they use in Gmail and so on), makes it easy to embed playable MP3s in your posts. Syntax: [mp3=path/to/filename.mp3]. Dump this in your functions.php:

function mp3player($attr) {
	$src = str_replace("=", "", $attr[0]);
	return '<embed type="application/x-shockwave-flash" src="http://www.google.com/reader/ui/3247397568-audio-player.swf?audioUrl='.$src.'" width="100%" height="27" allowscriptaccess="never" quality="best" bgcolor="#ffffff" wmode="window" flashvars="playerMode=embedded" />';
}
add_shortcode('mp3', 'mp3player');

Here’s an example:

Music by Speaker Bite Me.

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Wordpress Trick: Create A Google Viewer PDF Shortcode [Update]

    13:25 wordpress, wordpress-tricks

Want your PDFs to view through Google Reader? Wrap it in a shortcode like this: Link to a PDF. Drop the following in your functions.php:

function pdflink($attr, $content) {
	return '<a class="pdf" href="http://docs.google.com/viewer?url=' . $attr['href'] . '">'.$content.'</a>';
}
add_shortcode('pdf', 'pdflink');

[Update]: Here’s an updated shortcode function which allows you to also embed PDFs using this syntax: Link to a PDF. Note how it’s just a tad shorter, and you don’t have to remember the “href” parameter, though you can still use it.

function pdflink($attr, $content) {
	if ($attr['href']) {
		return '<a class="pdf" href="http://docs.google.com/viewer?url=' . $attr['href'] . '">'.$content.'</a>';
	} else {
		$src = str_replace("=", "", $attr[0]);
		return '<a class="pdf" href="http://docs.google.com/viewer?url=' . $src . '">'.$content.'</a>';
	}
}
add_shortcode('pdf', 'pdflink');

Also, here’s an example PDF link using the above code: Link to a PDF.

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