I am in the process of writing a very long post — currently 8,500 words and around 40 images, with more to come — and, all of a sudden, the preview doesn’t work: It just shows empty content, with the header loading correctly. The symptoms are the same as described on this page, however I am not using any shortcodes. (Although, maybe that wouldn’t matter: If the problem is with PHP’s RegExp, then whether there are shortcodes or not, length will still be an issue.)
Unfortunately, this is on a managed server, so I have no way of changing the PHP.ini file. As such, what are my options? If this is the likely cause, presumably the only thing I can do is split my post into several. Any other ideas?… Thanks 🙂
EDIT: Using WP 3.2.1
In the following snippet, you’ll see all filters attached to the title, content & excerpt (from /wp-includes/default-filters.php). Try to remove in a first try only stuff like capital P dangit, smilies and such and if this doesn’t work, remove the more critical stuff. I’d only do this until the post saves and then move stuff out or wrap it into a if ( is_single( $post->ID ) ) statement to not trigger it elsewhere.
foreach ( array( 'the_content', 'the_title' ) as $filter )
remove_filter( $filter, 'capital_P_dangit', 11 );
// Display filters
remove_filter( 'the_title', 'wptexturize' );
remove_filter( 'the_title', 'convert_chars' );
remove_filter( 'the_title', 'trim' );
remove_filter( 'the_content', 'wptexturize' );
remove_filter( 'the_content', 'convert_smilies' );
remove_filter( 'the_content', 'convert_chars' );
remove_filter( 'the_content', 'wpautop' );
remove_filter( 'the_content', 'shortcode_unautop' );
remove_filter( 'the_content', 'prepend_attachment' );
remove_filter( 'the_excerpt', 'wptexturize' );
remove_filter( 'the_excerpt', 'convert_smilies' );
remove_filter( 'the_excerpt', 'convert_chars' );
remove_filter( 'the_excerpt', 'wpautop' );
remove_filter( 'the_excerpt', 'shortcode_unautop');
remove_filter( 'get_the_excerpt', 'wp_trim_excerpt' );
