(PHP 4 >= 4.0.5, PECL pdflib >= 1.0.0)
PDF_setmatrix — Set current transformation matrix
$p
    , float $a
    , float $b
    , float $c
    , float $d
    , float $e
    , float $f
    )
   Explicitly sets the current transformation matrix. Returns TRUE on success or FALSE on failure.