What are potential pitfalls to be aware of when using PHP's image functions for inserting text or images at specific coordinates?

One potential pitfall when using PHP's image functions for inserting text or images at specific coordinates is not taking into account the image's dimensions, which can result in the text or image being placed outside of the visible area. To solve this, always ensure that the coordinates you provide are within the bounds of the image dimensions.

// Example code snippet to insert text at specific coordinates on an image
$image = imagecreatefromjpeg('image.jpg');
$color = imagecolorallocate($image, 255, 255, 255);
$text = 'Hello, World!';
$font = 'arial.ttf';
$font_size = 20;
$x = 50; // X-coordinate
$y = 100; // Y-coordinate

imagettftext($image, $font_size, 0, $x, $y, $color, $font, $text);

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