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2018-02-22
源自：手把手教你實現電商網站后臺開發 2-2
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<?php require_once 'string.func.php'; //通過GD庫做驗證碼 //創建畫布 function verifyImage( $type=1,$length=4,$pixel=0, $line=0,$sess_name="verify"){ ?? session_start(); ?? $width=80; ?? $height=30; ?? $image=imagecreate($width, $height); ?? $white=imagecolorallocate($image, 255, 255, 255); ?? $black=imagecolorallocate($image, 0, 0, 0); ?? //用填充矩形填充畫布 ?? imagefilledrectangle($image, 1, 1, $width-2, $height-2, $white);
?? //寫驗證碼 ?? $chars=buildRandomString($type,$length);
?? $_SESSION[$sess_name]=$chars; ?? $fontfiles=array(FZSTK.TTF,MSYH.TTC,MSYHBD.TTC,MSYHL.TTC,SIMKAI.TTF,SIMLI.TTF,SIMSUN.TTC); ?? for($i=0;$i<$length;$i++){ ?????? $size=mt_rand(14,18); ?????? $angle=mt_rand(-15,15); ?????? $x=5+$i*$size; ?????? $y=mt_rand(20,26); ?????? $fontfile="../fonts/".$fontfiles[mt_rand(0,count($fontfiles)-1)]; ?????? $color=imagecolorallocate($image, mt_rand(50,90), mt_rand(80,200), mt_rand(90,180)); ?????? $text=substr($chars,$i,1); ?????? imagettftext($image, $size, $angle, $x, $y, $color, $fontfile, $text); ?? } ?? //干擾因素 ?? if($pixel){ ?????? for($i=0;$i<50;$i++){ ?????????? imagesetpixel($image, mt_rand(0,$width-1), mt_rand(0,$height-1), $black); ?????? } ?? } ?? if($line){ ?????? for($i=0;$i<$line;$i++){ ?????????? $color=imagecolorallocate($image,? mt_rand(50,90), mt_rand(80,200), mt_rand(90,180)); ?????????? imageline($image, mt_rand(0,$width-1), mt_rand(0,$height-1), $color); ?????? } ?? }
?? header("content-type:image/gif"); ?? imagegif($image); ?? imagedestroy($image); } verifyImage(2,5,30,5);
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<?php
require_once 'string.func.php';
//通過GD庫做驗證碼
//創建畫布
function verifyImage( $type=1,$length=4,$pixel=0, $line=0,$sess_name="verify"){
?? session_start();
?? $width=80;
?? $height=30;
?? $image=imagecreate($width, $height);
?? $white=imagecolorallocate($image, 255, 255, 255);
?? $black=imagecolorallocate($image, 0, 0, 0);
?? //用填充矩形填充畫布
?? imagefilledrectangle($image, 1, 1, $width-2, $height-2, $white);
?? //寫驗證碼
?? $chars=buildRandomString($type,$length);
?? $_SESSION[$sess_name]=$chars;
?? $fontfiles=array(FZSTK.TTF,MSYH.TTC,MSYHBD.TTC,MSYHL.TTC,SIMKAI.TTF,SIMLI.TTF,SIMSUN.TTC);
?? for($i=0;$i<$length;$i++){
?????? $size=mt_rand(14,18);
?????? $angle=mt_rand(-15,15);
?????? $x=5+$i*$size;
?????? $y=mt_rand(20,26);
?????? $fontfile="../fonts/".$fontfiles[mt_rand(0,count($fontfiles)-1)];
?????? $color=imagecolorallocate($image, mt_rand(50,90), mt_rand(80,200), mt_rand(90,180));
?????? $text=substr($chars,$i,1);
?????? imagettftext($image, $size, $angle, $x, $y, $color, $fontfile, $text);
?? }
?? //干擾因素
?? if($pixel){
?????? for($i=0;$i<50;$i++){
?????????? imagesetpixel($image, mt_rand(0,$width-1), mt_rand(0,$height-1), $black);
?????? }
?? }
?? if($line){
?????? for($i=0;$i<$line;$i++){
?????????? $color=imagecolorallocate($image,? mt_rand(50,90), mt_rand(80,200), mt_rand(90,180));
?????????? imageline($image, mt_rand(0,$width-1), mt_rand(0,$height-1), $color);
?????? }
?? }
?? header("content-type:image/gif");
?? imagegif($image);
?? imagedestroy($image);
}
verifyImage(2,5,30,5);