(PECL ps >= 1.1.0)
ps_setlinecap — Sets appearance of line ends
Sets how line ends look like.
Resource identifier of the postscript file as returned by ps_new().
The type of line ends. Possible values are PS_LINECAP_BUTT, PS_LINECAP_ROUND, or PS_LINECAP_SQUARED.
如果成功则返回 TRUE，失败则返回 FALSE。