pre_post_guid │ filter-hook │ WP 2.3.0

Filters the value of a specific field before saving.

Only applied to post fields with a name which is prefixed with post_.

• pre_post_ID
• pre_post_comment_status
• pre_post_ping_status
• pre_post_to_ping
• pre_post_pinged
• pre_post_guid
• pre_post_menu_order
• pre_post_comment_count

Usage

add_filter( 'pre_post_guid', 'wp_kama_pre_post_guid_filter' );

/**
 * Function for `pre_post_guid` filter-hook.
 * 
 * @param mixed $value Value of the post field.
 *
 * @return mixed
 */
function wp_kama_pre_post_guid_filter( $value ){

	// filter...
	return $value;
}

$value(mixed)

Value of the post field.

Changelog

Where the hook is called

$value = apply_filters( "pre_post_{$field}", $value );

Where the hook is used in WordPress

add_filter( $filter, 'wp_strip_all_tags' );

add_filter( $filter, 'sanitize_url' );

add_filter( $filter, 'wp_filter_kses' );