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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 |
|---|---|
| 517 | } |
| 518 | } |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | if (! isset($src) ) |
| 523 | return false; |
| 524 | |
| 525 | // Do we need to constrain the image? |
| 526 | if ( ($max_dims = apply_filters('attachment_max_dims', $max_dims)) && file_exists($src_file) ) { |
| 527 | |
| 528 | $imagesize = getimagesize($src_file); |
| 529 | |
| 530 | if (($imagesize[0] > $max_dims[0]) || $imagesize[1] > $max_dims[1] ) { |
| 531 | $actual_aspect = $imagesize[0] / $imagesize[1]; |
| 532 | $desired_aspect = $max_dims[0] / $max_dims[1]; |
| 533 | |
| 534 | if ( $actual_aspect >= $desired_aspect ) { |
| 535 | $height = $actual_aspect * $max_dims[0]; |