What are the common pitfalls when combining text output with image generation in PHP scripts?

One common pitfall when combining text output with image generation in PHP scripts is that the header information may be sent before the image data, causing errors or rendering issues. To solve this, make sure to set the content type header to image/png or another appropriate image type before outputting any image data. 

<?php
// Set the content type header before outputting any image data
header('Content-Type: image/png');

// Generate image
$image = imagecreate(200, 200);
$bgColor = imagecolorallocate($image, 255, 255, 255);
$textColor = imagecolorallocate($image, 0, 0, 0);
imagestring($image, 5, 50, 50, 'Hello World', $textColor);

// Output image
imagepng($image);
imagedestroy($image);
?>

Keywords

image generation text output PHP scripts GD library font rendering

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