pre_post_(field) │ 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_.

The dynamic portion of the hook name, $field_no_prefix, refers to the post field name minus the post_ prefix. Possible filter names include:

• 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_(field)', 'wp_kama_pre_post_field_filter' );

/**
 * Function for `pre_post_(field)` filter-hook.
 * 
 * @param mixed $value Value of the post field.
 *
 * @return mixed
 */
function wp_kama_pre_post_field_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( 'pre_post_mime_type', 'sanitize_mime_type' );