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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 |
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283 |
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284 | /** |
285 | * Filters the generated attachment meta data. |
286 | * |
287 | * @since 2.1.0 |
288 | * |
289 | * @param array $metadata An array of attachment meta data. |
290 | * @param int $attachment_id Current attachment ID. |
291 | */ |
292 | return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id ); |
293 | } |
294 |
|
295 | /** |
296 | * Convert a fraction string to a decimal. |
297 | * |
298 | * @since 2.5.0 |
299 | * |
300 | * @param string $str |
301 | * @return int|float |