The latest WordPress 2.9 got a new function to automatically embed all plain text URLs with the help of oembed. On a blog displaying resized images together with the_excerpt it is nice to show also the embeded video clips if there is no image.
So how to get the code to embed a video from the database?
In WordPress 2.9, if you insert a plain URL link to a video from an oembed enabled site, WordPress will try to put the whole code around this URL to embed this video in a player.
This code will not show up in edit posts, but is written to postmeta table. The meta_key is looking like '_oembed_74dd854eb13572c16.....' and it's meta_value is the actually html code to get parsed.
Working inside the loop, we are going to get the unique meta_key of a post starting with oembed. If in a post is this meta_key we assign this to a variable (here: $oembkey)
Next we get the value of this key, which is actually the full html embed code (here: $embedhtml)
Finally we can echo $embedhtml to display only the video without the_content or the_excerpt.
The code to get only the embeded video:
<?php
$custom_field_keys = get_post_custom_keys();
foreach ( $custom_field_keys as $key => $value ) {
$valuet = trim(substr($value, 1, 4));
if ( 'oemb' == $valuet ) { // look if a oembed key exists
$oembkey = $value; //now set the the key we found as oembkey
$oembvalue = get_post_custom_values($oembkey); //get the value of oembkey as oembvalue
if (isset($oembvalue[0])) {
$embedhtml = ($oembvalue[0]);
}
}
}
?>and now echo it:
<?php echo $embedhtml; ?>In another topic I will explain how to resize this player here:
Change width and height in oembed code on the fly WP 2.9