PHP class implementing Chinese circular seals

PHP class implementing Chinese circular seals

/* * Chinese circular seals * @ Author lkk/lianq.net * @ Create on * @ Example: * $ Seal = new circleSeal ('You and I are standing in the Middle East, West, North and South ', 40 ); * $ Seal-> doImg (); */ Class circleSeal { Private $ sealString; // seal character Private $ strMaxLeng; // maximum character length Private $ sealRadius; // seal radius Private $ rimWidth; // border thickness Private $ innerRadius; // inner radius Private $ startRadius; // star radius Private $ startAngle; // The angle of the pentagram tilt. Private $ backGround; // seal color Private $ centerDot; // center coordinate Private $ img; // graphical resource handle Private $ font; // The specified font. Private $ fontSize; // specify the font size Private $ width; // image width Private $ height; // Image height Private $ points; // coordinates of each vertex of the pentagram Private $ charRadius; // string radius Private $ charAngle; // string skew angle Private $ spacing; // character interval angle // Constructor Public function _ construct ($ str = '', $ rad = 75, $ rmwidth = 6, $ strad = 24, $ stang = 0, $ crang = 0, $ fsize = 16, $ inrad = 0 ){ $ This-> sealString = empty ($ str )? 'Seal test String': $ str; $ This-> strMaxLeng = 12; $ This-> sealRadius = $ rad; $ This-> rimWidth = $ rmwidth; $ This-> startRadius = $ strad; $ This-> startAngle = $ stang; $ This-> charAngle = $ crang; $ This-> centerDot = array ('x' => $ rad, 'y' => $ rad ); $ This-> font = dirname (_ FILE _). '/simkai. ttf '; $ This-> fontSize = $ fsize; $ This-> innerRadius = $ inrad; // The default value is 0. no $ This-> spacing = 1; } // Create image resources Private function createImg (){ $ This-> width = 2 * $ this-> sealRadius; $ This-> height = 2 * $ this-> sealRadius; $ This-> img = imagecreate ($ this-> width, $ this-> height ); Imagecolorresolvealpha ($ this-> img, 255,255,255,127 ); $ This-> backGround = imagecolorallocate ($ this-> img, 255, 0 ); } // Draw a seal border Private function drawRim (){ For ($ I = 0; $ I <$ this-> rimWidth; $ I ++ ){ Imagearc ($ this-> img, $ this-> centerDot ['x'], $ this-> centerDot ['Y'], $ this-> width-$ I, $ this-> height-$ I, 0,360, $ this-> backGround ); } } // Draw incircle Private function drawInnerCircle (){ Imagearc ($ this-> img, $ this-> centerDot ['x'], $ this-> centerDot ['Y'], 2 * $ this-> innerRadius, 2 x $ this-> innerRadius, 0,360, $ this-> backGround ); } // Draw a string Private function drawString (){ // Encoding $ Charset = mb_detect_encoding ($ this-> sealString ); If ($ charset! = 'Utf-8 '){ $ This-> sealString = mb_convert_encoding ($ this-> sealString, 'utf-8', 'gbk '); } // Metering $ This-> charRadius = $ this-> sealRadius-$ this-> rimWidth-$ this-> fontSize; // string radius $ Leng = mb_strlen ($ this-> sealString, 'utf8'); // string length If ($ leng> $ this-> strMaxLeng) $ leng = $ this-> strMaxLeng; $ AvgAngle = 360/($ this-> strMaxLeng); // average character skew // Split and write strings $ Words = array (); // character array For ($ I = 0; $ I <$ leng; $ I ++ ){ $ Words [] = mb_substr ($ this-> sealString, $ I, 1, 'utf8 '); $ R = 630 + $ this-> charAngle + $ avgAngle * ($ I-$ leng/2) + $ this-> spacing * ($ i-1); // coordinate angle $ R = 720-$ this-> charAngle + $ avgAngle * ($ leng-2 * $ i-1)/2 + $ this-> spacing * (1-$ I ); // character angle $ X = $ this-> centerDot ['x'] + $ this-> charRadius * cos (deg 2rad ($ r); // x coordinate of the character $ Y = $ this-> centerDot ['Y'] + $ this-> charRadius * sin (deg 2rad ($ r); // y coordinate of the character Imagettftext ($ this-> img, $ this-> fontSize, $ R, $ x, $ y, $ this-> backGround, $ this-> font, $ words [$ I]); } } // Draw a star Private function drawStart (){ $ Ang_out = 18 + $ this-> startAngle; $ Ang_in = 56 + $ this-> startAngle; $ Rad_out = $ this-> startRadius; $ Rad_in = $ rad_out * 0.382; For ($ I = 0; $ I <5; $ I ++ ){ // Five vertex coordinates $ This-> points [] = $ rad_out * cos (2 * M_PI/5 * $ I-deg 2rad ($ ang_out )) + $ this-> centerDot ['x']; $ This-> points [] = $ rad_out * sin (2 * M_PI/5 * $ I-deg 2rad ($ ang_out )) + $ this-> centerDot ['Y']; // Inner concave coordinate $ This-> points [] = $ rad_in * cos (2 * M_PI/5 * ($ I + 1)-deg 2rad ($ ang_in )) + $ this-> centerDot ['x']; $ This-> points [] = $ rad_in * sin (2 * M_PI/5 * ($ I + 1)-deg 2rad ($ ang_in )) + $ this-> centerDot ['Y']; } Imagefilledpolygon ($ this-> img, $ this-> points, 10, $ this-> backGround ); } // Output Private function outPut (){ Header ('content-type: image/png '); Imagepng ($ this-> img ); Imagedestroy ($ this-> img ); } // Generate externally Public function doImg (){ $ This-> createImg (); $ This-> drawRim (); $ This-> drawInnerCircle (); $ This-> drawString (); $ This-> drawStart (); $ This-> outPut (); } }

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