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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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113 | * object type (comment, post, or user). |
114 | * |
115 | * @since 2.9.0 |
116 | * |
117 | * @param int $mid The meta ID after successful update. |
118 | * @param int $object_id Object ID. |
119 | * @param string $meta_key Meta key. |
120 | * @param mixed $meta_value Meta value. |
121 | */ |
122 | do_action( "added_{$meta_type}_meta", $mid, $object_id, $meta_key, $_meta_value ); |
123 |
|
124 | return $mid; |
125 | } |
126 |
|
127 | /** |
128 | * Update metadata for the specified object. If no value already exists for the specified object |
129 | * ID and metadata key, the metadata will be added. |
130 | * |
131 | * @since 2.9.0 |