Create new PDF document from a $source string
Close the path by drawing a straight line back to it's beginning.
Continue the open path in a straight line to the specified position.
Start a new path at the specified position. If a path has already been started, move the cursor without drawing a line.
Convert date to PDF format (it's close to ASN.1 (Abstract Syntax Notation One), defined in ISO/IEC 8824)
Return return the an associative array with PDF meta information, values may be string, boolean or float.