<?php
/*-----------------------------------------------------------------------------------
*类名称 ：Verification_code
*函数功能：设置验证码的大小 字体
*函数： 5个
*函数参数说明:设置验证码长宽：set_size；设置验证码字体大小：set_font_size；
设置验证码字体间距：set_padding；设置验证码字体上下距离：set_line_height； 显示验证码：Watermark
*说明：必须包含一种字体；
by:subtract
----------------------------------------------------------------------------------*/
class Verification_code
{
private $width;
private $height;
private $font_size;
private $padding;
private $line_height;
/*初始化*/
public function Verification_code()
{
$this->width = 70;
$this->height = 25;
$this->font_size = 15;
$this->padding = 18;
$this->line_height=25;
}
/*设置验证码长宽*/
public function set_size($width,$height)
{
$this->width=$width;
$this->height=$height;
}
/*设置验证码字体大小*/
public function set_font_size($font_size)
{
$this->font_size=$font_size;
}
/*设置验证码字体间距*/
public function set_padding($padding)
{
$this->padding=$padding;
}
/*设置验证码字体上下距离*/
public function set_line_height($line_height)
{
$this->line_height=$line_height;
}
/*显示验证码*/
public function Watermark()
{
for($i=0;$i<4;$i++){$str[$i]=dechex(rand(0,15));}
$im = imagecreate($this->width, $this->height);
$bg = imagecolorallocate($im, 255, 255, 255);
/*设置文字颜色*/
$textcolor[0] = imagecolorallocate($im, 0, 0, 255);
$textcolor[1] = imagecolorallocate($im, 255, 0, 0);
$textcolor[2] = imagecolorallocate($im, 51, 153,0);
$textcolor[3] = imagecolorallocate($im, 255, 0,255);
/*设置方格*/
$linecolor=imagecolorallocate($im,192,192,192);
for($j=0;$j<4;$j++){imageline ($im,0,$j*5+5,100,$j*5+5,$linecolor);}
for($j=0;$j<18;$j++){imageline ($im,$j*5+5,0,$j*5+5,30,$linecolor);}
/*设置点*/
// for($i=0;$i<300;$i++){imagesetpixel($im,rand(0,80),rand(0,30),$textcolor[0] );}
for($i=0;$i<4;$i++)
{
$x=rand(0,3);
$str[$i]=iconv("gbk","UTF-8",$str[$i]);
imagettftext($im,$this->font_size+rand(0,8),0,$i*($this->padding),$this->line_height,$textcolor[$x],"potatpress__.ttf",$str[$i]);
}
header("Content-type: image/png");
imagepng($im);
}
}
?>
