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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 |
---|---|
118 | /** |
119 | * Filters the site icon attachment metadata. |
120 | * |
121 | * @since 4.3.0 |
122 | * |
123 | * @see wp_generate_attachment_metadata() |
124 | * |
125 | * @param array $metadata Attachment metadata. |
126 | */ |
127 | $metadata = apply_filters( 'site_icon_attachment_metadata', $metadata ); |
128 | wp_update_attachment_metadata( $attachment_id, $metadata ); |
129 |
|
130 | return $attachment_id; |
131 | } |
132 |
|
133 | /** |
134 | * Adds additional sizes to be made when creating the site icon images. |
135 | * |
136 | * @since 4.3.0 |