PHP write generate cool verification code, PHP cool Verification Code _php tutorial

PHP write generate cool verification code, PHP cool Verification Code

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 Php2 $im=imagecreate (200,100);//Generate Canvas3Imagecolorallocate ($im, 0,0,0);//Background color4 $white=imagecolorallocate ($im,Rand(0,255),Rand(0,255),Rand(0,255) );//Generate random colors5  for($i= 0;$i<9;$i++)6 {7Imageline ($im,Rand(0,200),Rand(0,100),Rand(0,200),Rand(0,100),$white);//Generate Disturbing line elements8 }9  for($i= 0;$i<150;$i++)Ten { OneImagesetpixel ($im,Rand(0,200),Rand(0,100),$white);//Generate Interference point elements A } -  for($i=0,$str='';$i<4;$i++)//get four characters by Loop - { the     Switch(Rand(1,3)) -     { -          Case' 1 ': -         $ch=Rand(0,9); +          Break;  -          Case' 2 ': +         $ch=sprintf('%c ',Rand(97,122)); A          Break; at          Case' 3 ': -         $ch=sprintf('%c ',Rand(65,90)); -          Break; -     } -         $str.=$ch; -  in } -Imagettftext ($im, 32,Rand(0,15), 55, 70,$white, ' C.TTC ',$str);//Output a string on the canvas to Header("Content-type:image/jpeg"); +Imagejpeg ($im); -Imagedestroy ($im); the?>

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