imagecopyresized

The function of changing the size of a picture in a PHP program most people want to use imagecopyresized (), but after testing, it is found that using imagecopyresampled () changes the image quality higher.Let's take a look at the comparison results.

Imagecopyresized (PHP3, PHP44.0.0) imagecopyresized -- encode (resourcedst_im, resourcesrc_im, intdstX, intdstY, intsrcX imagecopyresized (PHP 3, PHP 4> = 4.0.0) Imagecopyresized -- Copy and resize part of an image Description Int imagecopyresized (

Php uploads images and adds watermarks (image watermarks and text watermarks ). Php uploads an image watermark (image watermark, text watermark). This is a complete watermark that is automatically added to the image when the user uploads the image,

Php uploads an image watermark (image watermark, text watermark). This is a complete watermark that is automatically added to the image when the user uploads the image, this added watermark function can be used to add text and image watermarks. Php

12. 3 The generation of automatic miniature graphsBecause of the large amount of data in the picture, the transfer process is relatively long, so when users browse the picture, often want to firstDisplays a thumbnail of a picture.Although you can

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PHP Upload image plus watermark (image watermark, text watermark) This is a more complete rationale in the user upload pictures automatically to the image to increase the water mark, this increase watermark function can increase the text watermark

The code is as follows:Copy code /** Created on 2010-6-21 ** The class for control image ** Made by s71ence ** @ $ Img_path: Image path* @ $ Is_auto_reduce: whether the image is automatically compressed according to the size level. 1 is* @ $

Two function comparisons for PHP image scalingPHP scales images in two ways: the imagecopyresized () function works in all GD versions, but its algorithm for scaling images is coarser. Imagecopyresamples (), the pixel interpolation algorithm obtains

Ec (2); automatic thumbnail generation & nbsp; the transfer process is relatively long due to the large amount of image data, therefore, when users browse images, they often want to display the thumbnail of an image first. & Nbsp; although you can

Php generates a thumbnail code. For more information, see. the transfer process is relatively long because the image data volume is large, you often want to display a thumbnail of an image. although you can scale the image at will by specifying the

Although you can resize a picture arbitrarily by specifying the width and height of the image in HTML, this method does not reduce the number of pixels in the image. The size of the graphics file does not change, and of course it does not speed up

This article mainly share with you the PHP generation with two-dimensional code image and force download implementation code, hope to help everyone realize a QR code. /* Download QR code */public function test () {//Receive passed parameters $data['

This time for everyone to bring PHP implementation generated with two-dimensional code image and forced to download the steps in detail, PHP implementation of the generation with two-dimensional code images and mandatory download of the attention to

Although the width and height of an image can be specified in HTML to scale the image at will, this method does not reduce the number of pixels of the image. The size of the image file has not changed, and of course the image download speed will not

Although you can scale a picture arbitrarily by specifying the width and height of the picture in HTML, this method does not reduce the number of pixels in the picture. The size of the graphics file has not changed, of course, will not speed up the

difference | Thumbnail PHP's GD extension provides two functions to scale images: Imagecopyresized (destsrcdxdysxsyDWDH SWsh);Imagecopyresampled (destsrcdxdysxsyDW dhSWSH The imagecopyresized () function is valid in all versions of GD, but its

Php generates a thumbnail. although you can specify the image width and height in HTML to scale the image at will, this method does not reduce the number of pixels of the image. The size of the image file has not changed, and of course the image

Php generates a thumbnail code. For more information, see. the transfer process is relatively long because the image data volume is large, you often want to display a thumbnail of an image. although you can scale the image at will by specifying the

The GD extension of PHP provides two functions to scale an image: Imagecopyresized (destsrcdxdysxsyDWDH SWsh);Imagecopyresampled (destsrcdxdysxsyDW dhSWsh); The imagecopyresized () function works in all GD versions, but its scaled image