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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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107 | * object type (comment, post, or user). |
108 | * |
109 | * @since 2.9.0 |
110 | * |
111 | * @param int $mid The meta ID after successful update. |
112 | * @param int $object_id Object ID. |
113 | * @param string $meta_key Meta key. |
114 | * @param mixed $meta_value Meta value. |
115 | */ |
116 | do_action( "added_{$meta_type}_meta", $mid, $object_id, $meta_key, $_meta_value ); |
117 |
|
118 | return $mid; |
119 | } |
120 |
|
121 | /** |
122 | * Update metadata for the specified object. If no value already exists for the specified object |
123 | * ID and metadata key, the metadata will be added. |
124 | * |
125 | * @since 2.9.0 |