The Best Of WordPress Snippets – Part 5

How To Schedule Events In Your WordPress Website

The following snippet will let you schedule events in your WordPress website.

if (!wp_next_scheduled('my_task_hook')) {
	wp_schedule_event( time(), 'hourly', 'my_task_hook' );
} 
add_action( 'my_task_hook', 'my_task_function' );  
function my_task_function() {
	wp_mail('you@yoursite.com', 'Automatic email', 'Hello, this is an automatically scheduled email from WordPress.');
}

if (!wp_next_scheduled('my_task_hook')) {

wp_schedule_event( time(), 'hourly', 'my_task_hook' );

}

add_action( 'my_task_hook', 'my_task_function' );

function my_task_function() {

wp_mail('you@yoursite.com', 'Automatic email', 'Hello, this is an automatically scheduled email from WordPress.');

}

How To Show Posts For Category

You do turn selective one-to-many times in choosing the posts for category. While the thing can be achieved by manually but to ease the job, using the snippet below you can show posts for category as per the way you want.

/**
 * Show latest posts for category
 * 
 * @return 
 * @param object $cats
 * @param object $show[optional]
 */
function show_title_cat( $cats, $show=5 ) {
    global $post; 
    $posts = query_posts('cat=' . $cats . '&showposts=' . $show );
    echo "<ul>";
    foreach ($posts as $post ) : setup_postdata($post); ?>
        <li><a href="<?php the_permalink(); ?>" rel="bookmark"><?php the_title(); ?></a></li>
    <?php endforeach;
    echo "</ul>";
}

/**

* Show latest posts for category

* @return

* @param object $cats

* @param object $show[optional]

function show_title_cat( $cats, $show=5 ) {

global $post;

$posts = query_posts('cat=' . $cats . '&showposts=' . $show );

echo "<ul>";

foreach ($posts as $post ) : setup_postdata($post); ?>

<li><a href="<?php the_permalink(); ?>" rel="bookmark"><?php the_title(); ?></a></li>

<?php endforeach;

echo "</ul>";

}

Snippet Source/Credit: undolog.com

How To Automatically Create Greybox Imageset From Images Attached To Post

Using the following snippet you will be able to automatically create greybox imageset from images attached to post.

<!--Automatic Greybox-->
		<?php 
		//Die zum Post gehoerenden Bilder ins Array $images schreiben
		//Put images from post in to array $images. Order by menu order defined in post gallery
		$images = get_children( array('post_parent' => $post->ID, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID') ); 
		//Pruefen, ob dem Beitrag Bilder angehaengt wurden.
		//check if there are any images attached to the post
		if (isset($images))
		{
				//Den Zaehler auf 0 setzen
				//set counter to 0
				$count=0;	
				//Alle Bilder im Array $images nacheinander durchlaufen
				//go through all images in array $images
			foreach( $images as $image )
				{
					$imageID = $image->ID;
					//fuer jedes Bild im Array die URL von sowohl der Mittleren, als auch der grossen Groesse ermitteln.
					//get medium and large image url for image
					$medImageSrc = wp_get_attachment_image_src($imageID, $size='medium', $icon = false); 
					$largeImageSrc = wp_get_attachment_image_src($imageID, $size='large', $icon = false); 
 
						//Wenn es sich um das erste Bild im Array handelt...
						//If it's the first image in the array
						if ($count==0)
					{
						//Den Greybox-Code mit einem Vorschaubild ausgeben
						//output Greybox Code with medium size preview
						echo"<a href='$largeImageSrc[0]' rel='shadowbox[Bilder]'><img src='$medImageSrc[0]' border='0'></a>";
					}
					//alle Bilder ,die nach dem erstern Bild kommen
					//this is for all the images that come after the first one
					else
					{
					//unsichtbare Greybox-Verknuepfung darstellen.
					//create invisible Greybox-Links without preview image
					echo"<a href='$largeImageSrc[0]' rel='shadowbox[Bilder]'></a>";
					}
					//Zaehler erhoehen.
					//increase counter
					$count++; 
				} //foreach
		} 
?> 
<!--ENDE Automatic Greybox -->

<?php

//Die zum Post gehoerenden Bilder ins Array $images schreiben

//Put images from post in to array $images. Order by menu order defined in post gallery

$images = get_children( array('post_parent' => $post->ID, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID') );

//Pruefen, ob dem Beitrag Bilder angehaengt wurden.

//check if there are any images attached to the post

if (isset($images))

{

//Den Zaehler auf 0 setzen

//set counter to 0

$count=0;

//Alle Bilder im Array $images nacheinander durchlaufen

//go through all images in array $images

foreach( $images as $image )

{

$imageID = $image->ID;

//fuer jedes Bild im Array die URL von sowohl der Mittleren, als auch der grossen Groesse ermitteln.

//get medium and large image url for image

$medImageSrc = wp_get_attachment_image_src($imageID, $size='medium', $icon = false);

$largeImageSrc = wp_get_attachment_image_src($imageID, $size='large', $icon = false);

//Wenn es sich um das erste Bild im Array handelt...

//If it's the first image in the array

if ($count==0)

{

//Den Greybox-Code mit einem Vorschaubild ausgeben

//output Greybox Code with medium size preview

echo"<a href='$largeImageSrc[0]' rel='shadowbox[Bilder]'><img src='$medImageSrc[0]' border='0'></a>";

}

//alle Bilder ,die nach dem erstern Bild kommen

//this is for all the images that come after the first one

else

{

//unsichtbare Greybox-Verknuepfung darstellen.

//create invisible Greybox-Links without preview image

echo"<a href='$largeImageSrc[0]' rel='shadowbox[Bilder]'></a>";

}

//Zaehler erhoehen.

//increase counter

$count++;

} //foreach

}

Snippet Source/Credit: Snipplr

How To Call jQuery In WordPress

The following snippet will you call jQuery in WordPress.

<?php wp_enqueue_script("jquery"); ?>

1	<?php wp_enqueue_script("jquery"); ?>

How To Create Short URL For Posts In WordPress

The following snippet will let you create short URL for posts in WordPress.

//place in functions.php in theme folder
<?php function getTinyUrl($url) { $tinyurl = file_get_contents("http://tinyurl.com/api-create.php?url=".$url); return $tinyurl; } ?> 
//call the function on the page
<a href="http://twitter.com/home?status=Currently reading <?php the_title(); ?> : <?php $turl = getTinyUrl(get_permalink($post->ID)); echo $turl ?>" title="Tweet this">Twitter link</a>

//place in functions.php in theme folder

<?php function getTinyUrl($url) { $tinyurl = file_get_contents("http://tinyurl.com/api-create.php?url=".$url); return $tinyurl; } ?>

//call the function on the page

<a href="http://twitter.com/home?status=Currently reading <?php the_title(); ?> : <?php $turl = getTinyUrl(get_permalink($post->ID)); echo $turl ?>" title="Tweet this">Twitter link</a>

Snippet Source/Credit: Snipplr

How To Allow Multisite Network In WordPress

The following snippet will let you allow multisite network in WordPress.

/** Sets up WordPress Network for multisite. */
define('WP_ALLOW_MULTISITE', true);

1 2	/** Sets up WordPress Network for multisite. */ define('WP_ALLOW_MULTISITE', true);