php验证码封装
2015-12-07 10:06
507 查看
/**
* 生成验证码
* @param int $type 1: 纯数字,2:纯字母,3:数字与字母混合
* @param int $length
* @return string
*/
function buildRandomString($type=1,$length=4){
if ($type == 1) {
$chars = join ( "", range ( 0, 9 ) );
} elseif ($type == 2) {
$chars = join ( "", array_merge ( range ( "a", "z" ), range ( "A", "Z" ) ) );
} elseif ($type == 3) {
$chars = join ( "", array_merge ( range ( "a", "z" ), range ( "A", "Z" ), range ( 0, 9 ) ) );
}
if ($length > strlen ( $chars )) {
exit ( "字符串长度不够" );
}
$chars = str_shuffle ( $chars );
return substr ( $chars, 0, $length );
}
//通过GD库做验证码
function verifyImage($type=1,$length=4,$pixel=0,$line=0,$sess_name = "verify"){
session_start();
//创建画布
$width = 80;
$height = 28;
$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 );
$chars = buildRandomString ( $type, $length );
$_SESSION [$sess_name] = $chars;
//$fontfiles = array ("MSYH.TTF", "MSYHBD.TTF", "SIMLI.TTF", "SIMSUN.TTC", "SIMYOU.TTF", "STZHONGS.TTF" );
$fontfiles = array ("SIMYOU.TTF");
//由于字体文件比较大,就只保留一个字体,如果有需要的同学可以自己添加字体,字体在你的电脑中的fonts文件夹里有,直接运行输入fonts就能看到相应字体
for($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 = $fontfiles[mt_rand ( 0, count ( $fontfiles ) - 1 )];
putenv('GDFONTPATH=' . realpath('.'));
$color = imagecolorallocate ( $image, mt_rand ( 50, 90 ), mt_rand ( 80, 200 ), mt_rand ( 90, 180 ) );
$text = substr ( $chars, $i, 1 );
//putenv('GDFONTPATH=' . realpath('.'));
// Name the font to be used (note the lack of the .ttf extension)
imagettftext ( $image, $size, $angle, $x, $y, $color, $fontfile, $text );
}
if ($pixel) {
for($i = 0; $i < 50; $i ++) {
imagesetpixel ( $image, mt_rand ( 0, $width - 1 ), mt_rand ( 0, $height - 1 ), $black );
}
}
if ($line) {
for($i = 1; $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 ), mt_rand ( 0, $width - 1 ), mt_rand ( 0, $height - 1 ), $color );
}
}
header ( "content-type:image/gif" );//设置头信息
imagegif ( $image );
imagedestroy ( $image );
}
* 生成验证码
* @param int $type 1: 纯数字,2:纯字母,3:数字与字母混合
* @param int $length
* @return string
*/
function buildRandomString($type=1,$length=4){
if ($type == 1) {
$chars = join ( "", range ( 0, 9 ) );
} elseif ($type == 2) {
$chars = join ( "", array_merge ( range ( "a", "z" ), range ( "A", "Z" ) ) );
} elseif ($type == 3) {
$chars = join ( "", array_merge ( range ( "a", "z" ), range ( "A", "Z" ), range ( 0, 9 ) ) );
}
if ($length > strlen ( $chars )) {
exit ( "字符串长度不够" );
}
$chars = str_shuffle ( $chars );
return substr ( $chars, 0, $length );
}
//通过GD库做验证码
function verifyImage($type=1,$length=4,$pixel=0,$line=0,$sess_name = "verify"){
session_start();
//创建画布
$width = 80;
$height = 28;
$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 );
$chars = buildRandomString ( $type, $length );
$_SESSION [$sess_name] = $chars;
//$fontfiles = array ("MSYH.TTF", "MSYHBD.TTF", "SIMLI.TTF", "SIMSUN.TTC", "SIMYOU.TTF", "STZHONGS.TTF" );
$fontfiles = array ("SIMYOU.TTF");
//由于字体文件比较大,就只保留一个字体,如果有需要的同学可以自己添加字体,字体在你的电脑中的fonts文件夹里有,直接运行输入fonts就能看到相应字体
for($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 = $fontfiles[mt_rand ( 0, count ( $fontfiles ) - 1 )];
putenv('GDFONTPATH=' . realpath('.'));
$color = imagecolorallocate ( $image, mt_rand ( 50, 90 ), mt_rand ( 80, 200 ), mt_rand ( 90, 180 ) );
$text = substr ( $chars, $i, 1 );
//putenv('GDFONTPATH=' . realpath('.'));
// Name the font to be used (note the lack of the .ttf extension)
imagettftext ( $image, $size, $angle, $x, $y, $color, $fontfile, $text );
}
if ($pixel) {
for($i = 0; $i < 50; $i ++) {
imagesetpixel ( $image, mt_rand ( 0, $width - 1 ), mt_rand ( 0, $height - 1 ), $black );
}
}
if ($line) {
for($i = 1; $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 ), mt_rand ( 0, $width - 1 ), mt_rand ( 0, $height - 1 ), $color );
}
}
header ( "content-type:image/gif" );//设置头信息
imagegif ( $image );
imagedestroy ( $image );
}
相关文章推荐
- php生成高清缩略图实例详解
- PHP面向对象 1.8 抽象类与接口
- php冒泡排序与快速排序实例详解
- PHP常用工具类大全附全部代码下载
- PHP+ajax分页实例简析
- php 升级到 5.3+ 后出现的一些错误,如 ereg(); ereg_replace(); 函数报错
- 用composer安装 Laravel | Laravel需要的环境配置
- php+ajax无刷新分页实例详解
- php is_scalar()函数
- php中urlencode与urldecode
- php apc
- php常用函数
- PHP7中用opcache.file_cache导出脚本opcode实现源代码保护
- psftp和pscp的使用感受
- php实现smarty模板无限极分类的方法
- 学习php设计模式 php实现门面模式(Facade)
- PHP使用内置函数file_put_contents写入文件及追加内容的方法
- PHP中Enum(枚举)用法实例详解
- 学习php设计模式 php实现原型模式(prototype)
- 学习php设计模式 php实现工厂模式(factory)