A HitchHackers guide through WordPress

Source code

function sanitize_post_field($field, $value, $post_id, $context) {

	$int_fields = array('ID', 'post_parent', 'menu_order');

	if ( in_array($field, $int_fields) )

		$value = (int) $value;



	// Fields which contain arrays of ints.

	$array_int_fields = array( 'ancestors' );

	if ( in_array($field, $array_int_fields) ) {

		$value = array_map( 'absint', $value);

		return $value;

	}



	if ( 'raw' == $context )

		return $value;



	$prefixed = false;

	if ( false !== strpos($field, 'post_') ) {

		$prefixed = true;

		$field_no_prefix = str_replace('post_', '', $field);

	}



	if ( 'edit' == $context ) {

		$format_to_edit = array('post_content', 'post_excerpt', 'post_title', 'post_password');



		if ( $prefixed ) {

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

			// Old school

			$value = apply_filters("{$field_no_prefix}_edit_pre", $value, $post_id);

		} else {