![]() Streams image in post to browser, along with enqueued changes in $_REQUEST. Stream_preview_image() wp-admin/includes/image-edit.php Marks a function argument as deprecated and inform when it has been used.Ĭalls the callback functions that have been added to a filter hook.Ĭhecks whether the given variable is a WordPress Error. _deprecated_argument() wp-includes/functions.php apply_filters_deprecated( 'image_save_pre', resource|GdImage $image, int $attachment_id )įilters the GD image resource to be streamed to the browser.Īpply_filters_deprecated() wp-includes/plugin.phpįires functions attached to a deprecated filter hook. Top ↑ Hooks apply_filters( 'image_editor_save_pre', WP_Image_Editor $image, int $attachment_id )įilters the WP_Image_Editor instance for the image to be streamed to the browser. $image = apply_filters_deprecated( 'image_save_pre', array( $image, $attachment_id ), '3.5.0', 'image_editor_save_pre' ) * int $attachment_id The attachment post ID. ![]() * resource|GdImage $image Image resource to be streamed. createThumbnail ( 'sunset.jpg', 'sunset_thumb.View all references function wp_stream_image( $image, $mime_type, $attachment_id ) instead. The script will then force the output size to the given given width & height values. If you don’t mind your image being skewed you can also supply the fourth argument (which is the output height). createThumbnail ( 'profile.jpg', 'profile_thumb.jpg', 160 ) Using this script you can now for example generate square 160 by 160 pixel thumbnails with the following command. */ function createThumbnail ( $src, $dest, $targetWidth, $targetHeight = null ) * $targetHeight - desired output height or null The image format will be GIF87a unless the image has been made transparent with imagecolortransparent, in which case the image format will be GIF89a. Link image type to correct image loader and saver // - makes it easier to add additional types later on // - makes the function easier to read const IMAGE_HANDLERS =, IMAGETYPE_PNG =>, IMAGETYPE_GIF => ] /** imagegif creates the GIF file in file from the image image.The image argument is the return from the imagecreate or imagecreatefrom function. ![]() It’s well documented so each sub-step is explained. Save the thumbnail to disk (using the correct PHP function) See fopen() for more details on how to specify the filename. Create a thumbnail by duplicating the image and resizing it A URL can be used as a filename with this function if the fopen wrappers have been enabled.Load the image (using the correct PHP function).For those we’ll need the following PHP methods: As it’s really cumbersome to have a thumbnail function per image type our mission is to write one function to handle all the usual image types. PHP has a long list of functions that can load images. Images ready? Launch your editor and let’s do some coding! The tutorial will not discuss uploading files to the server. Want to get the code and get back to your project? Download the script here.įor this article I’ll assume you’ve got some images uploaded on your PHP server. In this article we’ll look at a function that handles various image types and resizes them to a set width and height. If you’ve got photo galleries on your website or need to generate avatars from uploaded profile pictures you’ll most likely want to create thumbnails.
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