How to solve php imagepng error problem

php imagepng reports an error because the quality range of the image generated by ImagePNG is from 0 to 9. When parameters outside this range are passed in, the function will not work. The solution is to change the value to 0 to 9. , the error will disappear on its own.

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

How to solve the php imagepng error problem?

php error when uploading pictures: gd-png error: compression level must be 0 through 9

Error report

Warning: imagepng (): gd-png error: compression level must be 0 through 9

Solution

The quality of the image generated by JPEG image is a range from 0 (the lowest quality, smallest file size) to 100 (highest quality, largest file size).

imagejpeg($imgSource, $path, 100);

The reason for this error is because the quality of the image generated by ImagePNG ranges from 0 to 9. If the parameters passed in are outside this range, the function will not work. So, simply change the value to between 0 and 9 and the error will go away on its own.

imagepng($imgSource, $path, 9);

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