wp_content text length and displaying ‘more’ for the full text

Inside your loop use this:

<p><?php $excerpt = get_the_content(); if (strlen($excerpt) > 255) { $excerpt = substr($excerpt, 0, 255) . "..."; echo $excerpt; } ?></p>

Here get_the_content() will grab all the content but substr function will cut it down to 255, you can put any number you want.

Cheers !!!