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     $color3=imagecolorallocate($im,99,85,25);
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     imagepolygon($im,array(20,20,90,160,160,20,90,70,23,129),5,$color);
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     imagesetthickness($im,6);  //ÉèÖÃÍÖÔ²±ßÏߵĿí¶È£»
     imagearc($im,450,100,180,100,180,360,$color4);  //»æÖÆÒ»¸öÍÖÔ²»¡£»
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