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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 |
|---|---|
| 3936 | * Fires when a deprecated file is called. |
| 3937 | * |
| 3938 | * @since 2.5.0 |
| 3939 | * |
| 3940 | * @param string $file The file that was called. |
| 3941 | * @param string $replacement The file that should have been included based on ABSPATH. |
| 3942 | * @param string $version The version of WordPress that deprecated the file. |
| 3943 | * @param string $message A message regarding the change. |
| 3944 | */ |
| 3945 | do_action( 'deprecated_file_included', $file, $replacement, $version, $message ); |
| 3946 | |
| 3947 | /** |
| 3948 | * Filters whether to trigger an error for deprecated files. |
| 3949 | * |
| 3950 | * @since 2.5.0 |
| 3951 | * |
| 3952 | * @param bool $trigger Whether to trigger the error for deprecated files. Default true. |
| 3953 | */ |
| 3954 | if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) { |