(PECL ps >= 1.1.0)
ps_set_parameter — Sets certain parameters
$psdoc, string $name, string $value): boolSets several parameters which are used by many functions. Parameters are by definition string values.
psdocResource identifier of the postscript file as returned by ps_new().
nameFor a list of possible names see ps_get_parameter().
valueThe value of the parameter.
成功時(shí)返回 true， 或者在失敗時(shí)返回 false。