What to do if php pictures are written with Chinese garbled characters

Solution to writing garbled Chinese characters into php images: First open the corresponding PHP code file; then change mb_convert_encoding("...","UTF-8","GBK"); to ""html -entities","UTF-8"" is enough.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

Specific questions:

When drawing in PHP, writing Chinese into the picture is successful, but the Chinese displayed are some rare characters.

$im = imagecreatetruecolor(400,40);    
$black = imagecolorallocate($im,0,0,0);    
$white = imagecolorallocate($im,255,255,255);    
$grey = imagecolorallocate($im,128,128,128);    
imagefilledrectangle($im,0,0,399,39,$white);    
$text = mb_convert_encoding("呵呵呵","UTF-8","GBK");    
$font = "simsun.ttc";    
imagettftext($im,20,0,12,21,$grey,$font,$text);//输出灰色字符串作为阴影    
imagettftext($im,20,0,10,20,$black,$font,$text);//输出黑色字符串作为文本    
header("Content-type:image/png");    
imagepng($im);    
imagedestroy($im);    
?>

Solution:

$text = mb_convert_encoding("Hehehe","UTF-8","GBK");Change to $text = mb_convert_encoding("Hehehe","html-entities","UTF-8"); That's it.

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