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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 |
|---|---|
| 3580 | * @since 2.8.0 |
| 3581 | * @since 5.8.0 The `$scheme` parameter was added. |
| 3582 | * |
| 3583 | * @param string $url The complete URL to the includes directory including scheme and path. |
| 3584 | * @param string $path Path relative to the URL to the wp-includes directory. Blank string |
| 3585 | * if no path is specified. |
| 3586 | * @param string|null $scheme Scheme to give the includes URL context. Accepts |
| 3587 | * 'http', 'https', 'relative', or null. Default null. |
| 3588 | */ |
| 3589 | return apply_filters( 'includes_url', $url, $path, $scheme ); |
| 3590 | } |
| 3591 | |
| 3592 | /** |
| 3593 | * Retrieves the URL to the content directory. |
| 3594 | * |
| 3595 | * @since 2.6.0 |
| 3596 | * |
| 3597 | * @param string $path Optional. Path relative to the content URL. Default empty. |
| 3598 | * @return string Content URL link with optional path appended. |