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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 |
|---|---|
| 790 | * - `wp_handle_sideload_overrides` |
| 791 | * - `wp_handle_upload_overrides` |
| 792 | * |
| 793 | * @since 5.7.0 |
| 794 | * |
| 795 | * @param array|false $overrides An array of override parameters for this file. Boolean false if none are |
| 796 | * provided. @see _wp_handle_upload(). |
| 797 | * @param string[] $file An array of data for the file. Reference to a single element of `$_FILES`. |
| 798 | */ |
| 799 | $overrides = apply_filters( "{$action}_overrides", $overrides, $file ); |
| 800 | |
| 801 | // You may define your own function and pass the name in $overrides['upload_error_handler']. |
| 802 | $upload_error_handler = 'wp_handle_upload_error'; |
| 803 | if ( isset( $overrides['upload_error_handler'] ) ) { |
| 804 | $upload_error_handler = $overrides['upload_error_handler']; |
| 805 | } |
| 806 | |
| 807 | // You may have had one or more 'wp_handle_upload_prefilter' functions error out the file. Handle that gracefully. |
| 808 | if ( isset( $file['error'] ) && ! is_numeric( $file['error'] ) && $file['error'] ) { |