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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 |
|---|---|
| 111 | function get_columns() { |
| 112 | $users_columns = array( |
| 113 | 'cb' => '<input type="checkbox" />', |
| 114 | 'username' => __( 'Username' ), |
| 115 | 'name' => __( 'Name' ), |
| 116 | 'email' => __( 'E-mail' ), |
| 117 | 'registered' => _x( 'Registered', 'user' ), |
| 118 | 'blogs' => __( 'Sites' ) |
| 119 | ); |
| 120 | $users_columns = apply_filters( 'wpmu_users_columns', $users_columns ); |
| 121 | |
| 122 | return $users_columns; |
| 123 | } |
| 124 | |
| 125 | function get_sortable_columns() { |
| 126 | return array( |
| 127 | 'username' => 'login', |
| 128 | 'name' => 'name', |
| 129 | 'email' => 'email', |