What are some best practices for handling image manipulation functions in PHP to avoid errors like the one mentioned in the thread?

The issue mentioned in the thread is likely due to not checking if the image functions (such as `imagecreatefromjpeg`, `imagecopyresampled`, etc.) return `false`, which can lead to errors when manipulating images. To avoid this, always check the return value of these functions before proceeding with image manipulation.

// Example code snippet demonstrating best practices for handling image manipulation functions in PHP

// Load the original image
$original_image = 'path/to/original/image.jpg';
$image = imagecreatefromjpeg($original_image);

// Check if image creation was successful
if($image !== false) {
    // Perform image manipulation operations here

    // Save or output the manipulated image
    $output_image = 'path/to/output/image.jpg';
    imagejpeg($image, $output_image);

    // Free up memory
    imagedestroy($image);
} else {
    echo 'Error: Unable to load the image.';
}