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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 |
|---|---|
| 186 | /** |
| 187 | * Filter the HTML script tag of an enqueued script. |
| 188 | * |
| 189 | * @since 4.1.0 |
| 190 | * |
| 191 | * @param string $tag The `<script>` tag for the enqueued script. |
| 192 | * @param string $handle The script's registered handle. |
| 193 | * @param string $src The script's source URL. |
| 194 | */ |
| 195 | $tag = apply_filters( 'script_loader_tag', $tag, $handle, $src ); |
| 196 | |
| 197 | if ( $this->do_concat ) { |
| 198 | $this->print_html .= $tag; |
| 199 | } else { |
| 200 | echo $tag; |
| 201 | } |
| 202 | |
| 203 | return true; |
| 204 | } |