Loading
To load a pixmap from an .xpm file: 

<?php
  array gdk::pixmap_create_from_xpm(GdkWindow $window,
                                    GdkColor  $trans_color,
                                    string    $filename)
?>
$window
provides the defaults for creating the pixmap; it is the same window you would pass to the GdkPixmap() constructor

$trans_color
the color to use to fill in the transparent pixels in the pixmap. Can be null. 

<?php
  list($pixmap, $mask) =
     gdk::pixmap_create_from_xpm($win->window, null, "gtk-logo.xpm");
?>
You can also load pixmap from an inline data array. 

<?php
  $book_open_xpm = array("16 16 4 1",
                         "       c None s None",
                         ".      c black",
                         "X      c #808080",
                         "o      c white",
                         "                ",
                         "  ..            ",
                         " .Xo.    ...    ",
                         " .Xoo. ..oo.    ",
                         " .Xooo.Xooo...  ",
                         " .Xooo.oooo.X.  ",
                         " .Xooo.Xooo.X.  ",
                         " .Xooo.oooo.X.  ",
                         " .Xooo.Xooo.X.  ",
                         " .Xooo.oooo.X.  ",
                         "  .Xoo.Xoo..X.  ",
                         "   .Xo.o..ooX.  ",
                         "    .X..XXXXX.  ",
                         "    ..X.......  ",
                         "     ..         ",
                         "                ");
  list($pixmap, $mask) =
     gdk::pixmap_create_from_xpm_d($win->window, null, $book_open_xpm);
?>