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June 13, 2017 23:26
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Wordpress: Pull any image file and get it's thumbnail in any size/crop dynamically without the need for add_image_size()
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<?php | |
/** | |
* Call any image file (URI or ABSPATH) or image ID | |
* and get it's thumbnail in any size/crop dynamically | |
* | |
* Usage: <?php | |
* echo dynamic_img_src( 'http://yoursite.com/images/image.png', 'width=800&height=600&crop=true' ); | |
* echo dynamic_img_src( 38, array( 'width'=>800, 'height'=>600, 'crop'=>true ) ); | |
* | |
* @author Michael Niles <github@blindmikey.com> | |
* @version 1.0.0 | |
*/ | |
function dynamic_img_src( $original_src, $args ) | |
{ | |
if ( is_numeric( $original_src ) ) | |
{ | |
$original_src = wp_get_attachment_image_src( $original_src, 'large' ); | |
$original_src = $original_src[0]; | |
} | |
$path = str_replace( get_bloginfo('url').'/', ABSPATH, urldecode( $original_src ) ); | |
$settings = wp_parse_args( $args, array( | |
'width' => 150, | |
'height' => 150, | |
'crop' => false | |
)); | |
$settings['src'] = $original_src; | |
$settings['path'] = $path; | |
if ( ! file_exists( $path ) ) | |
{ | |
trigger_error( 'File "'.$path.'" does not exist.' ); | |
return false; | |
} | |
$ext = '.'.pathinfo( $settings['src'], PATHINFO_EXTENSION ); | |
$new_src_check = str_replace( $ext, '', $settings['path'] ) . '-' . $settings['width'] . 'x' . $settings['height'] . $ext; | |
$new_src = str_replace( $ext, '', $settings['src'] ) . '-' . $settings['width'] . 'x' . $settings['height'] . $ext; | |
if ( file_exists( $new_src_check ) ) | |
{ | |
return $new_src; | |
} | |
$image = wp_get_image_editor( $settings['path'] ); | |
if ( is_wp_error( $image ) ) | |
{ | |
trigger_error( $image->get_error_message() ); | |
return false; | |
} | |
$image->resize( $settings['width'], $settings['height'], | |
filter_var( $settings['crop'], FILTER_VALIDATE_BOOLEAN ) ); | |
$image->save( $new_src_check ); | |
return $new_src; | |
} |
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Next improvement planned: update WP's attachment metadata so that when the image is removed via WP admin, our copy gets nuked as well.