本文操作环境:Windows7系统、PHP7.1版、DELL G3电脑
php png 失真怎么办?
php合成png图片失真及文字居中解决办法
代码如下:
<?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);