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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 |
---|---|
89 | * media upload type. Possible values include 'image', 'audio', 'video', |
90 | * 'file', etc. |
91 | * |
92 | * The hook only fires if the current `$tab` is 'type' (From Computer), |
93 | * 'type_url' (From URL), or, if the tab does not exist (i.e., has not |
94 | * been registered via the {@see 'media_upload_tabs'} filter. |
95 | * |
96 | * @since 2.5.0 |
97 | */ |
98 | do_action( "media_upload_$type" ); |
99 | } else { |
100 | /** |
101 | * Fires inside limited and specific upload-tab views in the legacy |
102 | * (pre-3.5.0) media popup. |
103 | * |
104 | * The dynamic portion of the hook name, `$tab`, refers to the specific |
105 | * media upload tab. Possible values include 'library' (Media Library), |
106 | * or any custom tab registered via the {@see 'media_upload_tabs'} filter. |
107 | * |