What potential issues can arise when outputting text on a JPEG image using PHP?

One potential issue that can arise when outputting text on a JPEG image using PHP is that the text might not be easily readable if the color of the text blends in with the background of the image. To solve this issue, you can add a contrasting background behind the text to ensure readability. 

// Create a blank image with a white background
$image = imagecreatefromjpeg('example.jpg');
$white = imagecolorallocate($image, 255, 255, 255);

// Add text with a black color on the white background
$text = "Hello World";
$black = imagecolorallocate($image, 0, 0, 0);
imagettftext($image, 20, 0, 10, 50, $black, 'arial.ttf', $text);

// Output the image
header('Content-Type: image/jpeg');
imagejpeg($image);

// Free up memory
imagedestroy($image);

Keywords

GD library imagecreatefromjpeg imagestring text rendering image distortion

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