Very practical php Verification Code class, very practical php Verification Code

Very practical php Verification Code class, very practical php Verification Code

This example shares the php Verification Code class for your reference. The details are as follows:

<? Php/*** @ author Administrator **/class ValidateCode {private $ width; private $ height; private $ codeNum; private $ img_resouce; private $ disturbColorNum; private $ checkCode; function _ construct ($ width = 80, $ height = 20, $ codeNum = 4) {$ this-> width = $ width; $ this-> height = $ height; $ this-> codeNum = $ codeNum; $ this-> checkCode = $ this-> CreateCheckCode (); $ number = floor ($ width * $ height/25 ); if ($ number & gt; 240-$ code Num) {$ this-> disturbColorNum = 240-$ codeNum;} else {$ this-> disturbColorNum = $ number ;}} public function showImage ($ fontpath = '') {// create an image background $ this-> Img_resouce (); // var_dump ($ img_resouce); // set the interference element $ this-> setDistructcolor (); // randomly draw the text $ this-> outputtext ($ fontpath) to the image; // output the image $ this-> outputimage ();} /***** obtain the randomly created Verification Code */public function getCheckCode () {} private function Img_resouce () {// create a true color image $ this-> Img_resouce = imagecreatetruecolor ($ this-> width, $ this-> height); // randomly sets the image background $ backcolor = imagecolorallocate ($ this-> img_resouce, rand (225,255 ), rand (225,255), rand (225,255); // fill color imagefill ($ this-> img_resouce, 0, 0, $ backcolor ); // set the border background $ border = imagecolorallocate ($ this-> img_resouce, 0); // draw a rectangle imagerectangle ($ this-> img_resouce, $ this-> width-1, $ this-> height-1, $ border);} private function setDist Ructcolor () {// painting disturbance point for ($ I = 0; $ I <$ this-> disturbColorNum; $ I ++) {imagesetpixel ($ this-> img_resouce, rand (1, $ this-> width-2), rand (1, $ this-> height-2), rand (0,255 ));} // draw interference lines for ($ j = 0; $ j <3; $ j ++) {$ linecolor = imagecolorallocate ($ this-> img_resouce, rand (0,255 ), rand (0,255), rand (0,255); imagearc ($ this-> img_resouce, rand (0, $ this-> width), rand (0, $ this-> height), rand (10,225), rand (20,150), 55, 44, $ linecolor) ;}} private function CreateCheckCode () {$ code = '23456789abcdefghijkmnpqrstuvwxyzabcdefghijkmnpqrstuvwxyz '; $ string = ''; for ($ I = 0; $ I <$ this-> codeNum; $ I ++) {$ char = $ code {rand (0, strlen ($ code)-1)}; $ string. = $ char;} return $ string;} private function outputtext ($ fontpath = '') {for ($ I = 0; $ I <$ this-> codeNum; $ I ++) {$ fontcolor = imagecolorallocate ($ this-> img_resouce, rand (0,128), Rand (0,128), rand (0,128); if ($ fontpath = '') {$ fontsize = rand (3, 5 ); $ x = floor ($ this-> width/$ this-> codeNum) * $ I + 3; $ y = rand (0, $ this-> height-20 ); imagechar ($ this-> img_resouce, $ fontsize, $ x, $ y, $ this-> checkCode {$ I}, $ fontcolor );} else {$ fontsize = rand (12, 16); $ x = floor ($ this-> width-8)/$ this-> codeNum) * $ I + 8; $ y = rand ($ fontsize, $ this-> height-15); imagettftext ($ this-> img_resouce, $ fontsize, rand (-45, 45), $ x, $ y, $ fontcolor, fontpath, $ this-> checkCode {$ I}) ;}} private function outputimage () {if (imagetypes () & IMG_GIF) {header ("Content-type: image/gif"); imagegif ($ this-> img_resouce);} else if (imagetypes () & IMG_JPEG) {header ("Content-type: image/jpeg"); imagejpeg ($ this-> img_resouce);} else if (imagetypes () & IMG_PNG) {header ("Content-type: image/png"); imagepng ($ this-> img_resouce);} else {ec Ho "types not supported by PHP" ;}} private function _ destruct () {imagedestroy ($ this-> img_resouce) ;}}?>

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