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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 |
|---|---|
| 355 | /** |
| 356 | * Filters the HTML script tag of an enqueued script. |
| 357 | * |
| 358 | * @since 4.1.0 |
| 359 | * |
| 360 | * @param string $tag The `<script>` tag for the enqueued script. |
| 361 | * @param string $handle The script's registered handle. |
| 362 | * @param string $src The script's source URL. |
| 363 | */ |
| 364 | $tag = apply_filters( 'script_loader_tag', $tag, $handle, $src ); |
| 365 | |
| 366 | if ( $this->do_concat ) { |
| 367 | $this->print_html .= $tag; |
| 368 | } else { |
| 369 | echo $tag; |
| 370 | } |
| 371 | |
| 372 | return true; |
| 373 | } |