Re-size WordPress images on the fly using built-in WordPress functions. Use the vt_resize function to dynamically re-size WordPress images located in a custom field, featured image, uploads directory, NextGen Gallery WordPress plugin, or even an external link to an offsite image. It is very simple to use, just copy/paste the code below into your WordPress … Read more
I don’t remember a function that will do precisely that, but it is easily achieved with API overall: Retrieve attachment ID with get_post_thumbnail_id() Retrieve available sizes with get_intermediate_image_sizes() For each size use wp_get_attachment_image_src(), which gives precisely data you need (URL and dimensions).
This function will generate an image by temporarily registering an image size, generating the image (if necessary) and the removing the size so new images will not be created in that size. function lazy_image_size($image_id, $width, $height, $crop) { // Temporarily create an image size $size_id = ‘lazy_’ . $width . ‘x’ .$height . ‘_’ . … Read more
well if you are using WyPiekacz plugin; as you said for checking that featured image is uploaded, you can tweak it little bit to check that if there is featured image it is of minimum dimesions as you required. $has_thumbnail = false; if ( ( $post_id > 0 ) && function_exists( ‘has_post_thumbnail’ ) ) { … Read more
When an image is uploaded in WordPress, it is saved in its original size, and also as some resized copies in different sizes. In this way it becomes easy to use different sizes, of the same image, for different purposes. By default, WordPress creates 3 copies in 3 different sizes: ‘thumb’ ‘medium’ ‘large’ The size … Read more
Try the following. First, add this piece of code to the template: <?php $image_data = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), “thumbnail” ); ?> $image_data will now return an array containing the url, width, and height (function reference). To get the width, you might do this: <?php $image_width = $image_data[1]; ?> In your specific example, after adding … Read more
Not natively. You’d have to write some code to make it happen – there’s a nice pastebin function that provide the necessary code to do it. Edit (12/19/2011): Yep here’s how you can do this programmatically. Add the following two functions to your functions.php file and you should be good to go. The code has … Read more
When an image size is added either by WordPress(add_image_size), or by a plugin or your own custom code it gets added into the $_wp_additional_image_sizes global, i can’t find a similar function for pulling data from that global, but you could certainly just look inside the global to determine what width and height a registered image … Read more
Related: Filter to remove image dimension attributes? There’s a filter on post_thumbnail_html which receives as its argument the full html element representing the post thumbnail image before it’s echoed to the page. You can filter out the dimensions with a bit of regex: add_filter( ‘post_thumbnail_html’, ‘remove_thumbnail_dimensions’, 10, 3 ); function remove_thumbnail_dimensions( $html, $post_id, $post_image_id ) … Read more
Can’t this simply be done with media_sideload_image() ? Seems pretty simple. Only catch is if you aren’t on admin area, you must include some libraries from within WordPress includes: // only need these if performing outside of admin environment require_once(ABSPATH . ‘wp-admin/includes/media.php’); require_once(ABSPATH . ‘wp-admin/includes/file.php’); require_once(ABSPATH . ‘wp-admin/includes/image.php’); // example image $image=”http://example.com/logo.png”; // magic sideload … Read more