February 12, 2011 
Definition:
function sanitize_post_field($field, $value, $post_id, $context) {}
Sanitize post field based on context.
Possible context values are: ‘raw’, ‘edit’, ‘db’, ‘display’, ‘attribute’ and ‘js’. The ‘display’ context is used by default. ‘attribute’ and ‘js’ contexts are treated like ‘display’ when calling filters.
Parameters
- string $field: The Post Object field name.
- mixed $value: The Post Object value.
- int $post_id: Post ID.
- string $context: How to sanitize post fields. Looks for ‘raw’, ‘edit’, ‘db’, ‘display’, ‘attribute’ and ‘js’.
Return values
returns:Sanitized value.
Defined filters
- edit_{$field}
apply_filters("edit_{$field}", $value, $post_id) - {$field_no_prefix}_edit_pre
apply_filters("{$field_no_prefix}_edit_pre", $value, $post_id)
Source code
function sanitize_post_field($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 {
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