pre_post_mime_type │ filter-hook │ WP 2.3.0

Filters the value of a specific post field before saving.

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

• pre_post_author
• pre_post_date
• pre_post_date_gmt
• pre_post_content
• pre_post_title
• pre_post_excerpt
• pre_post_status
• pre_post_password
• pre_post_name
• pre_post_modified
• pre_post_modified_gmt
• pre_post_content_filtered
• pre_post_parent
• pre_post_type
• pre_post_mime_type

Usage

add_filter( 'pre_post_mime_type', 'wp_kama_pre_post_mime_type_filter' );

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

	// filter...
	return $value;
}

$value(mixed)

Value of the post field.

Changelog

Where the hook is called

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

Where the hook is used in WordPress

add_filter( 'pre_post_mime_type', 'sanitize_mime_type' );