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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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54 | } else { |
55 | /** |
56 | * Filters the default media upload type in the legacy (pre-3.5.0) media popup. |
57 | * |
58 | * @since 2.5.0 |
59 | * |
60 | * @param string $type The default media upload type. Possible values include |
61 | * 'image', 'audio', 'video', 'file', etc. Default 'file'. |
62 | */ |
63 | $type = apply_filters( 'media_upload_default_type', 'file' ); |
64 | } |
65 |
|
66 | // Tab: gallery, library, or type-specific. |
67 | if ( isset($_GET['tab']) ) { |
68 | $tab = strval($_GET['tab']); |
69 | } else { |
70 | /** |
71 | * Filters the default tab in the legacy (pre-3.5.0) media popup. |
72 | * |