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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
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125 | * object type (comment, post, term, or user). |
126 | * |
127 | * @since 2.9.0 |
128 | * |
129 | * @param int $mid The meta ID after successful update. |
130 | * @param int $object_id Object ID. |
131 | * @param string $meta_key Meta key. |
132 | * @param mixed $_meta_value Meta value. |
133 | */ |
134 | do_action( "added_{$meta_type}_meta", $mid, $object_id, $meta_key, $_meta_value ); |
135 |
|
136 | return $mid; |
137 | } |
138 |
|
139 | /** |
140 | * Update metadata for the specified object. If no value already exists for the specified object |
141 | * ID and metadata key, the metadata will be added. |
142 | * |
143 | * @since 2.9.0 |