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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 |
|---|---|
| 399 | if ( $did_width && $w == $max_width - 1 ) { |
| 400 | $w = $max_width; // Round it up |
| 401 | } |
| 402 | |
| 403 | // Note: $did_height means it is possible $smaller_ratio == $height_ratio. |
| 404 | if ( $did_height && $h == $max_height - 1 ) { |
| 405 | $h = $max_height; // Round it up |
| 406 | } |
| 407 | |
| 408 | return apply_filters( 'wp_constrain_dimensions', array( $w, $h ), $current_width, $current_height, $max_width, $max_height ); |
| 409 | } |
| 410 | |
| 411 | /** |
| 412 | * Retrieve calculated resize dimensions for use in WP_Image_Editor. |
| 413 | * |
| 414 | * Calculates dimensions and coordinates for a resized image that fits |
| 415 | * within a specified width and height. |
| 416 | * |
| 417 | * Cropping behavior is dependent on the value of $crop: |