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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 | 
|---|---|
| 547 |       * | 
| 548 |       * @param null|mixed $null   Whether to preempt output of the resize dimensions. | 
| 549 |       * @param int        $orig_w Original width in pixels. | 
| 550 |       * @param int        $orig_h Original height in pixels. | 
| 551 |       * @param int        $dest_w New width in pixels. | 
| 552 |       * @param int        $dest_h New height in pixels. | 
| 553 |       * @param bool|array $crop   Whether to crop image to specified width and height or resize. | 
| 554 |       *                           An array can specify positioning of the crop area. Default false. | 
| 555 |       */ | 
| 556 |      $output = apply_filters( 'image_resize_dimensions', null, $orig_w, $orig_h, $dest_w, $dest_h, $crop ); | 
| 557 |  | 
| 558 |      if ( null !== $output ) { | 
| 559 |           return $output; | 
| 560 |      } | 
| 561 |  | 
| 562 |      // Stop if the destination size is larger than the original image dimensions. | 
| 563 |      if ( empty( $dest_h ) ) { | 
| 564 |           if ( $orig_w < $dest_w ) { | 
| 565 |                return false; |