How can PHP developers troubleshoot and resolve errors like "Fatal error: Call to undefined function ImageCreate()" when working with image manipulation functions in PHP?

To resolve the error "Fatal error: Call to undefined function ImageCreate()", PHP developers can enable the GD extension in their PHP configuration. This extension is required for image manipulation functions in PHP.

// Enable the GD extension in PHP configuration
// For example, in php.ini file, uncomment or add the line:
// extension=gd