gdlib - Convert image format PNG to JPEG without saving to disk - PHP

Question

• I am taking a PNG image from a url as below.
• I want to convert the PNG image to JPEG without saving disk with PHP.

• Finally I want to assign JPEG image to $content_jpg variable.

   $url = 'http://www.example.com/image.png';
   $content_png = file_get_contents($url);
  
   $content_jpg=;
  

Answer 1

Simplified answer is,

// PNG image url
$url = 'http://www.example.com/image.png';

// Create image from web image url
$image = imagecreatefrompng($url);

// Start output buffer
ob_start(); 

// Convert image
imagejpeg($image, NULL,100);
imagedestroy($image);

// Assign JPEG image content from output buffer
$content_jpg = ob_get_clean();