The first two parameters identify the new and old image resource respectively. The imagecopyresampled() function accepts 10 different parameters. The image created by this function will be all black so use the imagecopyresampled() function to copy and resize the original image over the new black one you just created. The imagecreatetruecolor() function creates a new true color image with given width and height. Resize Image to Fixed Width and HeightĪfter you have the image resource identifier, you can use other GD functions to resize the image. It applies an appropriate imagecreatefrom*() function based on the image type and returns the image resource identifier in the end. The load_image() function accepts two parameters, the path or URL of the image file and the image type. The list() function is used to assign values to multiple variables at once. The $filename variable can contain either the path of the image or its URL. $old_image = load_image($filename, $type) List($width, $height, $type) = getimagesize($filename) Use the value of this returned constant to determine the type of image and appropriate function to use. The IMAGETYPE_XXX constants are stored at index 2 of the returned array. The width and height of the image are stored at index 0 and 1 respectively. This function returns an array with up to 7 elements. The function you use will depend on the type of image you are resizing.įirst, use the getimagesize() function to get important information about the image like its width, height and type. Loading the image will require to use different functions like The first step before you resize an image is loading it as an image resource inside the script. GD has all the necessary functions to manipulate images so you won't have to use any other 3rd party library. You can make use of the PHP's GD library to resize images in PHP. Maybe you need to resize images that your users are uploading. Maybe you have to create multiple sizes of the same image to serve on different devices. Many times, you have to programmatically resize images.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |