What to do if php png is distorted

php Solution to png distortion: 1. Create a PHP sample file; 2. Create a true color canvas with the same size as the background image; 3. Copy the background image; 4. Synthesize png images through "imagecreatefrompng" That’s it.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

What should I do if php png is distorted?

Solution to PHP synthetic png image distortion and text centering

The code is as follows:

<?php
    ob_clean();
    $bg = "image1.png";
    $image_1 = imagecreatefrompng($bg);
    $bgx = imagesx($image_1);
    $bgy = imagesy($image_1);
    //创建一个和背景图片一样大小的真彩色画布（ps：只有这样才能保证后面copy图片的时候不会失真）
    $bgimage = imageCreatetruecolor($bgx,$bgy);
    imagesavealpha($bgimage, true);//保持透明
    imagealphablending($bgimage, true);//混色模式
    $alpha = imagecolorallocatealpha($bgimage, 0, 0, 0, 127);//透明
    imagefill($bgimage, 0, 0, $alpha);
    //copy背景图片
    imagecopyresampled($bgimage,$image_1,0,0,0,0,$bgx,$bgy,$bgx,$bgy);
    $fontColor = imagecolorallocate($bgimage,0x33,0x33,0x33);
    $image_2 = imagecreatefrompng( "image2.png");
    //合成图片2
    imagecopyresampled($bgimage, $image_2, 100, 100, 0, 0, 40, 40, imagesx($image_2) , imagesy($image_2));
    //文字
    $textLen = mb_strlen($text1);
    $fontSize  = 20;
    $fontWidth = imagefontwidth($fontSize)*3;//不知为什么，实测如此
    $textWidth = $fontWidth * mb_strlen($text1);
    $textx = ceil ( ($bgx - $textWidth) / 2 );
    imageTTFText($bgimage, $fontSize, 0, $textx, 450, $fontColor, $font , $text1);
    $result = imagepng($bgimage,"newimage.png");
    imagedestroy($bgimage);
    imagedestroy($qrcode);

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