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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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125 | } |
126 |
|
127 | /** |
128 | * Filter the options white list. |
129 | * |
130 | * @since 2.7.0 |
131 | * |
132 | * @param array White list options. |
133 | */ |
134 | $whitelist_options = apply_filters( 'whitelist_options', $whitelist_options ); |
135 |
|
136 | /* |
137 | * If $_GET['action'] == 'update' we are saving settings sent from a settings page |
138 | */ |
139 | if ( 'update' == $action ) { |
140 | if ( 'options' == $option_page && !isset( $_POST['option_page'] ) ) { // This is for back compat and will eventually be removed. |
141 | $unregistered = true; |
142 | check_admin_referer( 'update-options' ); |
143 | } else { |