验证码问题
自己网上弄了个验证码放在libraries下，命名为ValidationCode.php<?php
class ValidationCode {
private $width, $height, $codenum;//验证码宽度、高度、位数
public $code;//产生的验证码
private $codeimage;//验证码图片
private $distrubcolor;//干扰像素
//析构函数，设置验证码宽度、高度、位数
function __construct($width = '80', $height = '20', $codenum = '4') {
$this->width = $width;
$this->height = $height;
$this->codenum = $codenum;
}
//输出验证码图片
public function outImage() {
$this->outFileHeader();
$this->createCode();
$this->createImage();
$this->setDistrubColor();
$this->writeCodeImage();
imagepng($this->codeimage);
imagedestroy($this->codeimage);
}
//验证码输出头
public function outFileHeader() {
header('Content-type: image/png');
}
//产生验证码
public function createCode() {
$this->code = strtoupper(substr(md5(rand()), 0, $this->codenum));
}
//产生验证码图片
public function createImage() {
$this->codeimage = @imagecreate($this->width, $this->height);//新建一个基于调色板的图像
imagecolorallocate($this->codeimage, 200, 200, 200);//为新建的图像分配颜色
}
//设置图片干扰像素
public function setDistrubColor() {
for ($i = 0; $i < 128; $i++) {
$this->distrubcolor = imagecolorallocate($this->codeimage, rand(0, 255), rand(0, 255), rand(0, 255));
imagesetpixel($this->codeimage, rand(2, 128), rand(2, 38), $this->distrubcolor);//画上干扰点
}
}
//在背景上逐个画上验证码
public function writeCodeImage() {
for ($i = 0; $i < $this->codenum; $i++) {
$bg_color = imagecolorallocate($this->codeimage, rand(0, 255), rand(0, 128), rand(0, 255));
$x = floor($this->width / $this->codenum) * $i;
$y = rand(0, $this->height - 15);
imagechar($this->codeimage, 5, $x, $y, $this->code[$i], $bg_color);
}
}
}
在controllers中引用
function authcode() {
$this->load->library('ValidationCode');
$authcode = new ValidationCode();
$authcode->outImage();
}
可以显示验证码
但改成以下形式的代码就提示：
A PHP Error was encounteredSeverity: Notice
Message: Undefined property: Admin::$ValidationCode
Filename: controllers/admin.php
Line Number: 151（也就是$this->ValidationCode->outImage();这行就问题）
function authcode() {
$this->load->library('ValidationCode');
$this->ValidationCode->outImage();
}
这是怎么回事？
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