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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 |
|---|---|
| 22 | * |
| 23 | * The meta tag will only be included as necessary. |
| 24 | * |
| 25 | * @since 5.7.0 |
| 26 | * |
| 27 | * @param array $robots Associative array of directives. Every key must be the name of the directive, and the |
| 28 | * corresponding value must either be a string to provide as value for the directive or a |
| 29 | * boolean `true` if it is a boolean directive, i.e. without a value. |
| 30 | */ |
| 31 | $robots = apply_filters( 'wp_robots', array() ); |
| 32 | |
| 33 | // Don't allow mutually exclusive directives. |
| 34 | if ( ! empty( $robots['follow'] ) ) { |
| 35 | unset( $robots['nofollow'] ); |
| 36 | } |
| 37 | if ( ! empty( $robots['nofollow'] ) ) { |
| 38 | unset( $robots['follow'] ); |
| 39 | } |
| 40 | if ( ! empty( $robots['archive'] ) ) { |