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PHP入门培训教程 一个漂亮的PHP验证码

 

PHP入门培训教程 一个漂亮的PHP验证码

如何写一个漂亮的PHP验证码?兄弟连PHP培训小编分享一段代码给大家:

  <?php

  class Imagecode{

  private $width ;

  private $height;

  private $counts;

  private $distrubcode;

  private $fonturl;

  private $session;

  function __construct($width = 120,$height = 30,$counts = 5,$distrubcode="1235467890qwertyuipkjhgfdaszxcvbnm",$fonturl="C:\Windows\Fonts\TektonPro-BoldCond.otf"){

  $this->width=$width;

  $this->height=$height;

  $this->counts=$counts;

  $this->distrubcode=$distrubcode;

  $this->fonturl=$fonturl;

  $this->session=$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));//±³¾°ÑÕÉ«

  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->fonturl;

  $originalcode = $this->distrubcode;

  $countdistrub = strlen($originalcode);

  $dscode = $originalcode[rand(0,$countdistrub-1)];

  $color = ImageColorAllocate($im, rand(40,140),rand(40,140),rand(40,140));

  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);

  $fonturl="C:\Windows\Fonts\AdobeGothicStd-Bold.otf";//$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(0,50),rand(50,100),rand(100,140));

  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();

 

PHP入门培训教程 一个漂亮的PHP验证码