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这篇CFSDN的博客文章支持中文字母数字、自定义字体php验证码代码由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

代码如下

<?php  /*  * Captcha Class base on PHP GD Lib  * @author Design  * @version 1.0  * @demo  * include('captchaClass.php');  * $captchaDemo=new Captcha();  * $captchaDemo->createImage();  */  class Captcha{  //@定义验证码图片高度  private $height;  //@定义验证码图片宽度  private $width;  //@定义验证码字符个数  private $textNum;  //@定义验证码字符内容  private $textContent;  //@定义字符颜色  private $fontColor;  //@定义随机出的文字颜色  private $randFontColor;  //@定义字体大小  private $fontSize;  //@定义字体  private $fontFamily;  //@定义背景颜色  private $bgColor;  //@定义随机出的背景颜色  private $randBgColor;  //@定义字符语言  private $textLang;  //@定义干扰点数量  private $noisePoint;  //@定义干扰线数量  private $noiseLine;  //@定义是否扭曲  private $distortion;  //@定义扭曲图片源  private $distortionImage;  //@定义是否有边框  private $showBorder;  //@定义验证码图片源  private $image;  //@Constructor 构造函数  public function Captcha(){  $this->textNum=4;  $this->fontSize=16;  $this->fontFamily='c:\windows\fontsSIMYOU.ttf';//设置中文字体，可以改成linux的目录  $this->textLang='en';  $this->noisePoint=30;  $this->noiseLine=3;  $this->distortion=false;  $this->showBorder=false;  }  //@设置图片宽度  public function setWidth($w){  $this->width=$w;  }  //@设置图片高度  public function setHeight($h){  $this->height=$h;  }  //@设置字符个数  public function setTextNumber($textN){  $this->textNum=$textN;  }  //@设置字符颜色  public function setFontColor($fc){  $this->fontColor=sscanf($fc,'#%2x%2x%2x');  }  //@设置字号  public function setFontSize($n){  $this->fontSize=$n;  }  //@设置字体  public function setFontFamily($ffUrl){  $this->fontFamily=$ffUrl;  }  //@设置字符语言  public function setTextLang($lang){  $this->textLang=$lang;  }  //@设置图片背景  public function setBgColor($bc){  $this->bgColor=sscanf($bc,'#%2x%2x%2x');  }  //@设置干扰点数量  public function setNoisePoint($n){  $this->noisePoint=$n;  }  //@设置干扰线数量  public function setNoiseLine($n){  $this->noiseLine=$n;  }  //@设置是否扭曲  public function setDistortion($b){  $this->distortion=$b;  }  //@设置是否显示边框  public function setShowBorder($border){  $this->showBorder=$border;  }  //@初始化验证码图片  public function initImage(){  if(empty($this->width)){$this->width=floor($this->fontSize*1.3)*$this->textNum+10;}  if(empty($this->height)){$this->height=$this->fontSize*2;}  $this->image=imagecreatetruecolor($this->width,$this->height);  if(empty($this->bgColor)){  $this->randBgColor=imagecolorallocate($this->image,mt_rand(100,255),mt_rand(100,255),mt_rand(100,255));  }else{  $this->randBgColor=imagecolorallocate($this->image,$this->bgColor[0],$this->bgColor[1],$this->bgColor[2]);  }  imagefill($this->image,0,0,$this->randBgColor);  }  //@产生随机字符  public function randText($type){  $string='';  switch($type){  case 'en':  $str='ABCDEFGHJKLMNPQRSTUVWXY3456789';  for($i=0;$i<$this->textNum;$i++){  $string=$string.','.$str[mt_rand(0,29)];  }  break;  case 'cn':  for($i=0;$i<$this->textNum;$i++) {  $string=$string.','.chr(rand(0xB0,0xCC)).chr(rand(0xA1,0xBB));  }  $string=iconv('GB2312','UTF-8',$string); //转换编码到utf8  break;  }  return substr($string,1);  }  //@输出文字到验证码  public function createText(){  $textArray=explode(',',$this->randText($this->textLang));  $this->textContent=join('',$textArray);  if(empty($this->fontColor)){  $this->randFontColor=imagecolorallocate($this->image,mt_rand(0,100),mt_rand(0,100),mt_rand(0,100));  }else{  $this->randFontColor=imagecolorallocate($this->image,$this->fontColor[0],$this->fontColor[1],$this->fontColor[2]);  }  for($i=0;$i<$this->textNum;$i++){  $angle=mt_rand(-1,1)*mt_rand(1,20);  imagettftext($this->image,$this->fontSize,$angle,5+$i*floor($this->fontSize*1.3),floor($this->height*0.75),$this->randFontColor,$this->fontFamily,$textArray[$i]);  }  }  //@生成干扰点  public function createNoisePoint(){  for($i=0;$i<$this->noisePoint;$i++){  $pointColor=imagecolorallocate($this->image,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));  imagesetpixel($this->image,mt_rand(0,$this->width),mt_rand(0,$this->height),$pointColor);  }  }  //@产生干扰线  public function createNoiseLine(){  for($i=0;$i<$this->noiseLine;$i++) {  $lineColor=imagecolorallocate($this->image,mt_rand(0,255),mt_rand(0,255),20);  imageline($this->image,0,mt_rand(0,$this->width),$this->width,mt_rand(0,$this->height),$lineColor);  }  }  //@扭曲文字  public function distortionText(){  $this->distortionImage=imagecreatetruecolor($this->width,$this->height);  imagefill($this->distortionImage,0,0,$this->randBgColor);  for($x=0;$x<$this->width;$x++){  for($y=0;$y<$this->height;$y++){  $rgbColor=imagecolorat($this->image,$x,$y);  imagesetpixel($this->distortionImage,(int)($x+sin($y/$this->height*2*M_PI-M_PI*0.5)*3),$y,$rgbColor);  }  }  $this->image=$this->distortionImage;  }  //@生成验证码图片  public function createImage(){  $this->initImage(); //创建基本图片  $this->createText(); //输出验证码字符  if($this->distortion){$this->distortionText();} //扭曲文字  $this->createNoisePoint(); //产生干扰点  $this->createNoiseLine(); //产生干扰线  if($this->showBorder){imagerectangle($this->image,0,0,$this->width-1,$this->height-1,$this->randFontColor);} //添加边框  imagepng($this->image);  imagedestroy($this->image);  if($this->distortion){imagedestroy($this->$distortionImage);}  return $this->textContent;  }  }  ?>使用方法：  <?php  //session_start();  header("Content-type:image/png");  include('captcha5_class.php');  $captcha5=new Captcha();  //@设置验证码宽度  //$captcha5->setWidth(200);  //@设置验证码高度  //$captcha5->setHeight(50);  //@设置字符个数  $captcha5->setTextNumber(5);  //@设置字符颜色  //$captcha5->setFontColor('#ff9900');  //@设置字号大小  //$captcha5->setFontSize(25);  //@设置字体  $captcha5->setFontFamily('c:\windows\fonts\STXINGKA.TTF');  //@设置语言  $captcha5->setTextLang('cn');  //@设置背景颜色  //$captcha5->setBgColor('#000000');  //@设置干扰点数量  //$captcha5->setNoisePoint(600);  //@设置干扰线数量  //$captcha5->setNoiseLine(10);  //@设置是否扭曲  //$captcha5->setDistortion(true);  //@设置是否显示边框  $captcha5->setShowBorder(true);  //输出验证码  $code=$captcha5->createImage();  //$_SESSION['captchaCode']['content']=$code;  //$_SESSION['captchaCode']['time']=microtime();  ?>  。

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