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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 |
|---|---|
| 218 | /** |
| 219 | * Filters file type extensions editable in the plugin editor. |
| 220 | * |
| 221 | * @since 2.8.0 |
| 222 | * @since 4.9.0 Adds $plugin param. |
| 223 | * |
| 224 | * @param string $plugin Plugin file. |
| 225 | * @param array $editable_extensions An array of editable plugin file extensions. |
| 226 | */ |
| 227 | $editable_extensions = (array) apply_filters( 'editable_extensions', $editable_extensions, $plugin ); |
| 228 | |
| 229 | return $editable_extensions; |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * Get list of file extensions that are editable for a given theme. |
| 234 | * |
| 235 | * @param WP_Theme $theme Theme. |
| 236 | * @return array File extensions. |