<?php
require_once 'string.func.php';
//通过GD库做验证码
function verifyImage($type=1,$length=4,$pixel=0,$line=0,$sess_name="verify")
{
session_start();
//创建画布
$width=80;
$height=30;
$image=imagecreatetruecolor($width, $height);
$white=imagecolorallocate($image, 255, 255, 255);
$black=imagecolorallocate($image, 0, 0, 0);
//用填充矩形填充画布
imagefilledrectangle($image, 1, 1, $width - 2, $height - 2, $white);
$type=1;$length=4;
$chars=buildRandomString($type,$length);
$sess_name="verify";
$_SESSION[$sess_name]=$chars;
$fontifles=array("MSYH.TTF", "MSYHBD.TTF", "SIMSUN.TTC", "SIMYOU.TTF");
for($i=0;$i<$length;$i++)
{
$size=mt_rand(14, 18);
$angle=mt_rand(-15, 15);
$x=5+$i*$size;
$y=mt_rand(20, 26);
$fontfile = "../font/".$fontifles [mt_rand ( 0, count ( $fontifles) - 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);
}
$pixel=50;
if($pixel){
for($i=0;$i<50;$i++)
{
imagesetpixel($image, mt_rand ( 0, $width - 1 ), mt_rand ( 0, $height - 1 ), $black );
}
}
$line=10;
if($line)
{
for($i=1;$i<$line;$i++)
{
$color=imagecolorallocate($image, mt_rand ( 50, 90 ), mt_rand ( 80, 200 ), mt_rand ( 90, 180 ));
imagesetpixel($image, mt_rand ( 0, $width - 1 ), mt_rand ( 0, $height - 1 ), $color); }
}
header("content-type:image/gif");
imagegif($image);
imagedestroy($image);
}
verifyImage();
?>
独孤啸