Short-circuits deleting metadata of a specific type.

Description

The dynamic portion of the hook name, $meta_type, refers to the meta object type (post, comment, term, user, or any other type with an associated meta table).
Returning a non-null value will effectively short-circuit the function.

Possible hook names include:

• delete_post_metadata
• delete_comment_metadata
• delete_term_metadata
• delete_user_metadata

Parameters

$deletenull|bool

Whether to allow metadata deletion of the given type.

$object_idint

ID of the object metadata is for.

$meta_keystring

Metadata key.

$meta_valuemixed

Metadata value. Must be serializable if non-scalar.

$delete_allbool

Whether to delete the matching metadata entries for all objects, ignoring the specified $object_id.
Default false.

Source

$check = apply_filters( "delete_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $delete_all );

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