gistfile1.txt

<?php
// Print two names on the picture, which accepted by query string parameters.

$n1 = $_GET['n1'];
$n2 = $_GET['n2'];

Header ("Content-type: image/jpeg");
$image = imageCreateFromPNG("someimage.png");
$color = ImageColorAllocate($image, 255, 255, 255);

// Calculate horizontal alignment for the names.
$BoundingBox1 = imagettfbbox(13, 0, 'ITCKRIST.TTF', $n1);

$boyX = ceil((125 - $BoundingBox1[2]) / 2); // lower left X coordinate for text

$BoundingBox2 = imagettfbbox(13, 0, 'ITCKRIST.TTF', $n2);

$girlX = ceil((107 - $BoundingBox2[2]) / 2); // lower left X coordinate for text

// Write names.
imagettftext($image, 23, 0, $boyX+500, 100, $color, 'ITCKRIST.TTF', $n1);

imagettftext($image, 23, 0, $girlX+310, 92, $color, 'ITCKRIST.TTF', $n2);

// Return output.
ImageJPEG($image, NULL, 93);
ImageDestroy($image);
?>