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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 |
|---|---|
| 421 | * |
| 422 | * @since 2.5.0 |
| 423 | * @since 4.4.0 The `$iptc` parameter was added. |
| 424 | * |
| 425 | * @param array $meta Image meta data. |
| 426 | * @param string $file Path to image file. |
| 427 | * @param int $sourceImageType Type of image. |
| 428 | * @param array $iptc IPTC data. |
| 429 | */ |
| 430 | return apply_filters( 'wp_read_image_metadata', $meta, $file, $sourceImageType, $iptc ); |
| 431 | |
| 432 | } |
| 433 | |
| 434 | /** |
| 435 | * Validate that file is an image. |
| 436 | * |
| 437 | * @since 2.5.0 |
| 438 | * |
| 439 | * @param string $path File path to test if valid image. |