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SESSION在不同浏览器的使用问题,请教

May 22, 2016 pm 06:24 PM

SESSION在不同浏览器的使用问题,请教

<?php
session_start();
// 配置验证码
$code_ini = array(
    &#39;code_count&#39; => 4, // 验证码长度
    &#39;code_size&#39; => 20, // 验证码字体大小
    &#39;code_width&#39; => 100, // 验证码框宽度
    &#39;code_height&#39; => 36, // 验证码框高度
    &#39;code_num&#39; => true, // 开启数字
    &#39;code_upper&#39; => true, // 开启大写字母
    &#39;code_lower&#39; => true, // 开启小写字母
    &#39;code_remove&#39; => &#39;1li0oO2zZ&#39;
) // 排除易混淆字符
;
// 将配置项转为对应变量
foreach ($code_ini as $key => $value) {
    $$key = $value;
}
// 创建验证码画布
$code_img = imagecreatetruecolor($code_width, $code_height);
$black = imagecolorallocate($code_img, 0, 0, 0);
// 填充随机背景颜色
$bg = imagecolorallocate($code_img, rand(200, 255), rand(200, 255), rand(200, 255));
imagefill($code_img, 0, 0, $bg);

// 随机画100个干扰点
for ($i = 0; $i < 100; $i ++) {
    $color = imagecolorallocate($code_img, rand(0, 200), rand(0, 200), rand(0, 200));
    imagesetpixel($code_img, rand(2, $code_width - 2), rand(2, $code_height - 2), $color);
}

// 随机画10个干扰线
for ($q = 0; $q < 10; $q ++) {
    $color = imagecolorallocate($code_img, rand(0, 200), rand(0, 200), rand(0, 200));
    imageline($code_img, rand(2, $code_width - 2), rand(2, $code_height - 2), rand(2, $code_width - 2), rand(2, $code_height - 2), $color);
}

// 获取验证码
$code = get_code($code_count, $code_num, $code_upper, $code_lower, $code_remove);
$_SESSION[&#39;code&#39;] = $code;
for ($i = 0; $i < $code_count; $i ++) {
    $color = imagecolorallocate($code_img, rand(0, 200), rand(0, 200), rand(0, 200));
    imagettftext($code_img, $code_size, rand(- 30, 30), 5 + 20 * $i, 24, $color, &#39;../Fun/shruti.ttf&#39;, $code[$i]);
}
imagerectangle($code_img, 0, 0, $code_width - 1, $code_height - 1, $black);
// 输出验证码
header(&#39;content-type:image/gif&#39;);
imagegif($code_img);

// 销毁资源
imagedestroy($code_img);

// 获得验证码
function get_code($code_count, $code_num, $code_upper, $code_lower, $code_remove)
{
    $num = array();
    $upper = array();
    $lower = array();
    if ($code_num) {
        $num = range(0, 9);
    }
    if ($code_upper) {
        $upper = range(&#39;A&#39;, &#39;Z&#39;);
    }
    if ($code_lower) {
        $lower = range(&#39;a&#39;, &#39;z&#39;);
    }
    // 合并符合条件数组
    $arr = array_merge($num, $lower, $upper);
    // 排除易混淆字符
    $remove = str_split($code_remove);
    $arr1 = array_diff($arr, $remove);
    $mess = &#39;&#39;;
    
    for ($i = 0; $i < $code_count; $i ++) {
        $mess .= $arr1[array_rand($arr1)];
        $_SESSION[&#39;code&#39;] = $mess;
    }
    return $mess;
}
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