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This article introduces the relevant knowledge of "how to solve the distortion of php gd library". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Php gd library distortion solutions: 1, open the corresponding PHP file; 2, through the imagecreatetruecolor function to create a canvas of the same size as the background image; 3, according to the actual needs to cover up the required pictures.

This article operating environment: windows7 system, PHP7.1 version, DELL G3 computer

How to solve the problem of php gd library distortion?

The problem of Image distortion in PHP drawing based on GD

Make a little thing these two days, and the pictures are superimposed and combined into a new picture. The cut picture uses the copper plug-in, and the effect is terrible. The picture is distorted, and the distortion is similar to the loss of detail color of GIF motion pictures on the Internet. So I found the following solution on the Internet, and the personal test is effective.

The most critical step is to create a canvas that is the same size as the background image using the imagecreatetruecolor (aline b) function.

$bgimg = imagecreatetruecolor (imagesx ($im), imagesy ($im))

With this $bgimg as low, pass the

Imagecopymerge ($bgimg,$im, 0,0,0,0 im imagesx, imagesy ($im), 100)

Cover the original buckle bottom image $im, and then cover up the required pictures according to the actual needs.

Of course, it is also possible to add words.

Imagefttext ($bgimg, $name_font, 0, $name_orginX, $name_orginY, $color, $font, $name)

Last

Header ('Content-type: image/png'); header (' Content-type: image/jpg'); $result = imagepng ($bgimg); imagedestroy ($bgimg)

This is not all the code, but anyone who knows GD should know where to put it.

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