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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 |
|---|---|
| 4950 | */ |
| 4951 | function wp_delete_file( $file ) { |
| 4952 | /** |
| 4953 | * Filter the path of the file to delete. |
| 4954 | * |
| 4955 | * @since 2.1.0 |
| 4956 | * |
| 4957 | * @param string $medium Path to the file to delete. |
| 4958 | */ |
| 4959 | $delete = apply_filters( 'wp_delete_file', $file ); |
| 4960 | if ( ! empty( $delete ) ) { |
| 4961 | @unlink( $delete ); |
| 4962 | } |
| 4963 | } |
| 4964 | |
| 4965 | /** |
| 4966 | * Outputs a small JS snippet on preview tabs/windows to remove `window.name` on unload. |
| 4967 | * |
| 4968 | * This prevents reusing the same tab for a preview when the user has navigated away. |