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sanitize_(object_type)_meta_(meta_key)_for_(object_subtype) filter-hook . WP 4.9.8

Filters the sanitization of a specific meta key of a specific meta type and subtype.

The dynamic portions of the hook name, $object_type, $meta_key, and $object_subtype, refer to the metadata object type (comment, post, term, or user), the meta key value, and the object subtype respectively.


add_filter( 'sanitize_(object_type)_meta_(meta_key)_for_(object_subtype)', 'filter_function_name_7120', 10, 4 );
function filter_function_name_7120( $meta_value, $meta_key, $object_type, $object_subtype ){
	// filter...

	return $meta_value;
Metadata value to sanitize.
Metadata key.
Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.
Object subtype.


Since 4.9.8 Introduced.

Where the hook is called

wp-includes/meta.php 1209
return apply_filters( "sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $meta_value, $meta_key, $object_type, $object_subtype );

Where in WP core the hook is used WordPress

wp-includes/meta.php 1352
add_filter( "sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['sanitize_callback'], 10, 4 );
wp-includes/meta.php 1496
remove_filter( "sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['sanitize_callback'] );