How to convert php pdf to jpg

php How to convert pdf to jpg: First create a PHP sample file; then use PHP and ImageMagick to convert PDF to JPG.

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The operating environment of this tutorial: Windows 7 system, PHP version 5.6, This method works for all brands of computers.

Specific question:

Convert PDF to high quality JPG using PHP and ImageMagick

I have a 300 DPI PDF that I want to convert A 300 DPI JPG at 2550x3300. I was told that ImageMagick could do this, so I got ImageMagick to work, but it only returns a JPG about 1/5 the size of the original PDF.

It's not the source image - I've done it with several high quality PDFs and they all had the same problem.

After looking for ideas on StackOverflow, this is the approach I want to use:

$im = new imagick($srcimg);
$im->setImageResolution(2550,3300);
$im->setImageFormat('jpeg');
$im->setImageCompression(imagick::COMPRESSION_JPEG);
$im->setImageCompressionQuality(100);
$im->writeImage($targetimg);
$im->clear();
$im->destroy();

But this still doesn't work.

I've also tried using $ img-> resizeImage() to resize the JPG, but if it's the right size, it's of poor quality.

Implementation method:

This is the correct method and the quality will improve.

$im = new imagick();
$im->setResolution(300, 300);
$im->readImage($srcimg);
$im->setImageFormat('jpeg');
$im->setImageCompression(imagick::COMPRESSION_JPEG);
$im->setImageCompressionQuality(100);
$im->writeImage($targetimg);
$im->clear();
$im->destroy();

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