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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 |
---|---|
1128 | */ |
1129 | public function check_username( $value, $request, $param ) { |
1130 | $username = (string) $value; |
1131 |
|
1132 | if ( ! validate_username( $username ) ) { |
1133 | return new WP_Error( 'rest_user_invalid_username', __( 'Username contains invalid characters.' ), array( 'status' => 400 ) ); |
1134 | } |
1135 |
|
1136 | /** This filter is documented in wp-includes/user.php */ |
1137 | $illegal_logins = (array) apply_filters( 'illegal_user_logins', array() ); |
1138 |
|
1139 | if ( in_array( strtolower( $username ), array_map( 'strtolower', $illegal_logins ) ) ) { |
1140 | return new WP_Error( 'rest_user_invalid_username', __( 'Sorry, that username is not allowed.' ), array( 'status' => 400 ) ); |
1141 | } |
1142 |
|
1143 | return $username; |
1144 | } |
1145 |
|
1146 | /** |