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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 |
|---|---|
| 4033 | * |
| 4034 | * Allows to add filters to modify the way a cropped image is saved. |
| 4035 | * |
| 4036 | * @since 4.3.0 |
| 4037 | * |
| 4038 | * @param string $context The Customizer control requesting the cropped image. |
| 4039 | * @param int $attachment_id The attachment ID of the original image. |
| 4040 | * @param string $cropped Path to the cropped image file. |
| 4041 | */ |
| 4042 | do_action( 'wp_ajax_crop_image_pre_save', $context, $attachment_id, $cropped ); |
| 4043 | |
| 4044 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 4045 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 4046 | |
| 4047 | $parent_url = wp_get_attachment_url( $attachment_id ); |
| 4048 | $parent_basename = wp_basename( $parent_url ); |
| 4049 | $url = str_replace( $parent_basename, wp_basename( $cropped ), $parent_url ); |
| 4050 | |
| 4051 | $size = wp_getimagesize( $cropped ); |