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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 |
|---|---|
| 1080 | */ |
| 1081 | function wp_admin_viewport_meta() { |
| 1082 | /** |
| 1083 | * Filters the viewport meta in the admin. |
| 1084 | * |
| 1085 | * @since 5.5.0 |
| 1086 | * |
| 1087 | * @param string $viewport_meta The viewport meta. |
| 1088 | */ |
| 1089 | $viewport_meta = apply_filters( 'admin_viewport_meta', 'width=device-width,initial-scale=1.0' ); |
| 1090 | |
| 1091 | if ( empty( $viewport_meta ) ) { |
| 1092 | return; |
| 1093 | } |
| 1094 | |
| 1095 | echo '<meta name="viewport" content="' . esc_attr( $viewport_meta ) . '">'; |
| 1096 | } |
| 1097 | |
| 1098 | /** |