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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 |
|---|---|
| 261 | |
| 262 | /** |
| 263 | * Filters the generated attachment meta data. |
| 264 | * |
| 265 | * @since 2.1.0 |
| 266 | * |
| 267 | * @param array $metadata An array of attachment meta data. |
| 268 | * @param int $attachment_id Current attachment ID. |
| 269 | */ |
| 270 | return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id ); |
| 271 | } |
| 272 | |
| 273 | /** |
| 274 | * Convert a fraction string to a decimal. |
| 275 | * |
| 276 | * @since 2.5.0 |
| 277 | * |
| 278 | * @param string $str |
| 279 | * @return int|float |