本文实例为大家分享了Laravel生成验证码的类，供大家参考，具体内容如下
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<?php
namespace App\Tool\Validate;
//验证码类
class ValidateCode {
private $charset = 'abcdefghkmnprstuvwxyzABCDEFGHKMNPRSTUVWXYZ23456789';//随机因子
private $code;//验证码
private $codelen = 4;//验证码长度
private $width = 130;//宽度
private $height = 50;//高度
private $img;//图形资源句柄
private $font;//指定的字体
private $fontsize = 20;//指定字体大小
private $fontcolor;//指定字体颜色
//构造方法初始化
public function __construct()
{
$this->font = public_path() . '/fonts/Elephant.ttf';//注意字体路径要写对，否则显示不了图片
$this->createCode();
}
//生成随机码
private function createCode()
{
$_len = strlen($this->charset) - 1;
for ($i = 0;$i < $this->codelen;++$i) {
$this->code .= $this->charset[mt_rand(0, $_len)];
}
}
//生成背景
private function createBg()
{
$this->img = imagecreatetruecolor($this->width, $this->height);
$color = imagecolorallocate($this->img, mt_rand(157, 255), mt_rand(157, 255), mt_rand(157, 255));
imagefilledrectangle($this->img, 0, $this->height, $this->width, 0, $color);
}
//生成文字
private function createFont()
{
$_x = $this->width / $this->codelen;
for ($i = 0;$i < $this->codelen;++$i) {
$this->fontcolor = imagecolorallocate($this->img, mt_rand(0, 156), mt_rand(0, 156), mt_rand(0, 156));
imagettftext($this->img, $this->fontsize, mt_rand(-30, 30), $_x * $i + mt_rand(1, 5), $this->height / 1.4, $this->fontcolor, $this->font, $this->code[$i]);
}
}
//生成线条、雪花
private function createLine()
{
//线条
for ($i = 0;$i < 6;++$i) {
$color = imagecolorallocate($this->img, mt_rand(0, 156), mt_rand(0, 156), mt_rand(0, 156));
imageline($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $color);
}
//雪花
for ($i = 0;$i < 100;++$i) {
$color = imagecolorallocate($this->img, mt_rand(200, 255), mt_rand(200, 255), mt_rand(200, 255));
imagestring($this->img, mt_rand(1, 5), mt_rand(0, $this->width), mt_rand(0, $this->height), '*', $color);
}
}
//输出
private function outPut()
{
header('Content-type:image/png');
imagepng($this->img);
imagedestroy($this->img);
}
//对外生成
public function doimg()
{
$this->createBg();
$this->createLine();
$this->createFont();
$this->outPut();
}
//获取验证码
public function getCode()
{
return strtolower($this->code);
}
}
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.cnblogs.com/sunshenggang/p/7772307.html