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#Imagegif in php code

Otherwise, there is no need to mention x, and y points, meaning that, the entire image will be cropped to preserve its appearance as it is except for its dimensions. These arguments will contain values for cropping some portion of the source image. These arguments, actually, represent the x, and y coordinates of the target and source image, respectively.

#Imagegif in php code

In this code sample, shown above, some of the arguments of this function are passed with a 0 value. For that, PHP function, named as, imagecopyresampled() for such resizing and reassembling process. Using these details provided, the required portion of the original image will be copied and reassembled onto the target layer. Dimensions for denoting the width and height of the original image and target image layer.Resizing and Reassemblingįor this step, we should provide a list of details about the source and the target image, that is used in the image resize process. This reference will be used in subsequent steps, for mentioning the target, on top of which the resized image will be assembled. Added to that, it will return a resource data identifier as a reference to the newly created image with specified width and height parameters. Imagecreatetruecolor() function will create empty image. PHP built-in function, named, imagecreatetruecolor() is used for this purpose, by accepting required dimensions, that is, the width and height of the target image. This image will be created with the dimensions to what the original image is expected to be resized. Get Resource Id for Target Image LayerĪfter getting the reference resource id from a source image file, we need to create a new image as a target layer. For example, IMAGETYPE_JPEG is defined with value 2 which is used for indicating JPEG images. The constants used in conditional statements are predefined with appropriate integer values denoting image type. All these PHP functions are used to get image properties and to get image file resource data expecting the name or path of the image file. After that, we can apply a suitable function to get the resource id. In this step, first, we need to get the image type by using the PHP function getimagesize(), which is used for getting an entire list of image properties, including width, height and etc.

For example, imagecreatefromjpeg(), imagecreatefromgif(), imagecreatefrompng(), used to get the resource identifier for JPEG, GIF and PNG images. These functions are used appropriately based on the type of image given for resizing.

In PHP, there are various functions to get an image file resource id.

Save resized image into the given target location.įor working on the given image file to be resized, we need to get the resource identifier for reference, as we have done while working with files after getting file resource, or like, getting directory handle to perform PHP directory functions.

Get resource id for target image layer.

Get the image resource id for the source image.

So, a combination of such functions is used to obtain the following steps, which will result in successful image resizing through PHP programming. In PHP, resizing an image, it can be achieved by using a set of PHP functions to create a new image from scratch, with the given dimensions, in which the original image is expected to be resized. If not, we need to resize these images, accordingly. While displaying images for our websites, it is important to ensure that it could be set within our layout boundary.