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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 |
|---|---|
| 4518 | |
| 4519 | /** |
| 4520 | * Filters the URI of a WordPress admin CSS file. |
| 4521 | * |
| 4522 | * @since 2.3.0 |
| 4523 | * |
| 4524 | * @param string $_file Relative path to the file with query arguments attached. |
| 4525 | * @param string $file Relative path to the file, minus its ".css" extension. |
| 4526 | */ |
| 4527 | return apply_filters( 'wp_admin_css_uri', $_file, $file ); |
| 4528 | } |
| 4529 | |
| 4530 | /** |
| 4531 | * Enqueues or directly prints a stylesheet link to the specified CSS file. |
| 4532 | * |
| 4533 | * "Intelligently" decides to enqueue or to print the CSS file. If the |
| 4534 | * {@see 'wp_print_styles'} action has *not* yet been called, the CSS file will be |
| 4535 | * enqueued. If the {@see 'wp_print_styles'} action has been called, the CSS link will |
| 4536 | * be printed. Printing may be forced by passing true as the $force_echo |