| <?php | |
| /* | |
| * Resize images dynamically using wp built in functions | |
| * @author Victor Teixeira | |
| * @link http://core.trac.wordpress.org/ticket/15311 | |
| * | |
| * php 5.2+ | |
| * | |
| * Exemple use: | |
| * | |
| * <?php | |
| * $thumb = get_post_thumbnail_id(); | |
| * $image = be_image_resize( $thumb,'' , 140, 110, true ); | |
| * ?> | |
| * <img src="<?php echo $image[url]; ?>" width="<?php echo $image[width]; ?>" height="<?php echo $image[height]; ?>" /> | |
| * | |
| * @param int $attach_id | |
| * @param string $img_url | |
| * @param int $width | |
| * @param int $height | |
| * @param bool $crop | |
| * @return array | |
| */ | |
| function be_image_resize( $attach_id = null, $img_url = null, $width, $height, $crop = false ) { | |
| // this is an attachment, so we have the ID | |
| if ( $attach_id ) { | |
| $image_src = wp_get_attachment_image_src( $attach_id, 'full' ); | |
| $file_path = get_attached_file( $attach_id ); | |
| // this is not an attachment, let's use the image url | |
| } else if ( $img_url ) { | |
| $file_path = parse_url( $img_url ); | |
| $file_path = ltrim( $file_path['path'], '/' ); | |
| //$file_path = rtrim( ABSPATH, '/' ).$file_path['path']; | |
| $orig_size = getimagesize( $file_path ); | |
| $image_src[0] = $img_url; | |
| $image_src[1] = $orig_size[0]; | |
| $image_src[2] = $orig_size[1]; | |
| } | |
| $file_info = pathinfo( $file_path ); | |
| $extension = '.'. $file_info['extension']; | |
| // the image path without the extension | |
| $no_ext_path = $file_info['dirname'].'/'.$file_info['filename']; | |
| $cropped_img_path = $no_ext_path.'-'.$width.'x'.$height.$extension; | |
| // checking if the file size is larger than the target size | |
| // if it is smaller or the same size, stop right here and return | |
| if ( $image_src[1] > $width || $image_src[2] > $height ) { | |
| // the file is larger, check if the resized version already exists (for crop = true but will also work for crop = false if the sizes match) | |
| if ( file_exists( $cropped_img_path ) ) { | |
| $cropped_img_url = str_replace( basename( $image_src[0] ), basename( $cropped_img_path ), $image_src[0] ); | |
| $vt_image = array ( | |
| 'url' => $cropped_img_url, | |
| 'width' => $width, | |
| 'height' => $height | |
| ); | |
| return $vt_image; | |
| } | |
| // crop = false | |
| if ( $crop == false ) { | |
| // calculate the size proportionaly | |
| $proportional_size = wp_constrain_dimensions( $image_src[1], $image_src[2], $width, $height ); | |
| $resized_img_path = $no_ext_path.'-'.$proportional_size[0].'x'.$proportional_size[1].$extension; | |
| // checking if the file already exists | |
| if ( file_exists( $resized_img_path ) ) { | |
| $resized_img_url = str_replace( basename( $image_src[0] ), basename( $resized_img_path ), $image_src[0] ); | |
| $vt_image = array ( | |
| 'url' => $resized_img_url, | |
| 'width' => $new_img_size[0], | |
| 'height' => $new_img_size[1] | |
| ); | |
| return $vt_image; | |
| } | |
| } | |
| // no cached files - let's finally resize it | |
| $new_img_path = image_resize( $file_path, $width, $height, $crop ); | |
| $new_img_size = getimagesize( $new_img_path ); | |
| $new_img = str_replace( basename( $image_src[0] ), basename( $new_img_path ), $image_src[0] ); | |
| // resized output | |
| $vt_image = array ( | |
| 'url' => $new_img, | |
| 'width' => $new_img_size[0], | |
| 'height' => $new_img_size[1] | |
| ); | |
| return $vt_image; | |
| } | |
| // default output - without resizing | |
| $vt_image = array ( | |
| 'url' => $image_src[0], | |
| 'width' => $image_src[1], | |
| 'height' => $image_src[2] | |
| ); | |
| return $vt_image; | |
| } | |
| /** | |
| * Returns a dynamically resized image | |
| * | |
| * Example: be_get_post_thumbnail( $post->ID, 90, 90, true ); | |
| * | |
| * @param int $post_id | |
| * @param int $width | |
| * @param int $height | |
| * @param bool $crop | |
| * @return string $image | |
| */ | |
| function be_get_post_thumbnail( $post_id = '', $width = '', $height = '', $crop = false ) { | |
| $attach_id = get_post_thumbnail_id( $post_id ); | |
| $image = be_image_resize( $attach_id, null, $width, $height, $crop ); | |
| return '<img src="' . $image['url'] . '" />'; | |
| } |
images WPAustin - Show Your Code
Bill Erickson
Bill Erickson is a freelance WordPress developer and a contributing developer to the Genesis framework. For the past 14 years he has worked with attorneys, publishers, corporations, and non-profits, building custom websites tailored to their needs and goals.