Elegant verification code

Elegant verification code

Import the font by yourself. you can modify the font as needed. We recommend that you use bold fonts. Class Imagecode { Private $ width; Private $ height; Private $ counts; Private $ distrubcode; Private $ fonturl; Private $ fonturlbg; Private $ session; /** * Enter description here... * * @ Param unknown_type $ width * @ Param unknown_type $ height * @ Param unknown_type $ Count * @ Param unknown_type $ distrubcode random character range * @ Param unknown_type $ fonturl serious code body * @ Param unknown_type $ fonturlbg disturbing character font */ Function _ construct ($ width = 120, $ height = 30, $ counts = 5, $ distrubcode = "1235467890 qwertyuipkjhgfdaszxcvbnm", $ fonturl = "msyhbd. ttf ", $ fonturlbg = 'F. ttf '){ $ This-> width = $ width; $ This-> height = $ height; $ This-> counts = $ counts; $ This-> distrubcode = $ distrubcode; $ This-> fonturl = $ fonturl; $ This-> fonturlbg = $ fonturlbg? $ Fonturlbg: $ fonturl; // used when no interfering font is set $ This-> session = $ this-> sessioncode (); Session_start (); $ _ SESSION ['code'] = $ this-> session; } Function imageout (){ $ Im = $ this-> createimagesource (); $ This-> setbackgroundcolor ($ im ); $ This-> set_code ($ im ); $ This-> setdistrubecode ($ im ); ImageGIF ($ im ); ImageDestroy ($ im ); } Private function createimagesource (){ Return imagecreate ($ this-> width, $ this-> height ); } Private function setbackgroundcolor ($ im ){ $ Bgcolor = ImageColorAllocate ($ im, rand (200,255), rand (200,255), rand (200,255); // ± 3? ° ?? ? Imagefill ($ im, 0, 0, $ bgcolor ); } Private function setdistrubecode ($ im ){ $ Count_h = $ this-> height; $ Cou = floor ($ count_h * 2 ); For ($ I = 0; $ I <$ cou; $ I ++ ){ $ X = rand (0, $ this-> width ); $ Y = rand (0, $ this-> height ); $ Jiaodu = rand (0,360 ); $ Fontsize = rand (8, 15 ); $ Fonturl = $ this-> fonturlbg; $ Originalcode = $ this-> distrubcode; $ Countdistrub = strlen ($ originalcode ); $ Dscode = $ originalcode [rand (0, $ countdistrub-1)]; $ Color = ImageColorAllocate ($ im, rand (40,140), rand (40,140), rand (40,140); // interfere with text color Imagettftext ($ im, $ fontsize, $ jiaodu, $ x, $ y, $ color, $ fonturl, $ dscode ); } } Private function set_code ($ im ){ $ Width = $ this-> width; $ Counts = $ this-> counts; $ Height = $ this-> height; $ Scode = $ this-> session; $ Y = floor ($ height/2) + floor ($ height/4 ); $ Fontsize = rand (30, 35 ); $ Fonturl = $ this-> fonturl; $ Counts = $ this-> counts; For ($ I = 0; $ I <$ counts; $ I ++ ){ $ Char = $ scode [$ I]; $ X = floor ($ width/$ counts) * $ I + 8; $ Jiaodu = rand (-20, 30 ); $ Color = ImageColorAllocate ($ im, rand (0,200), rand (50,200), rand (100,240); // text color Imagettftext ($ im, $ fontsize, $ jiaodu, $ x, $ y, $ color, $ fonturl, $ char ); } } Private function sessioncode (){ $ Originalcode = $ this-> distrubcode; $ Countdistrub = strlen ($ originalcode ); $ _ Dscode = ""; $ Counts = $ this-> counts; For ($ j = 0; $ j <$ counts; $ j ++ ){ $ Dscode = $ originalcode [rand (0, $ countdistrub-1)]; $ _ Dscode. = $ dscode; } Return $ _ dscode; } } Header ("Content-type: image/GIF "); $ Imagecode = new Imagecode (160,50 ); $ Imagecode-> imageout ();