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我使用secureimage解决方案生成验证码

我在 chrom 控制台上有这个错误

资源解释为图像,但使用 MIME 类型 text/html 传输

并在此 url 上输入时直接用作图像 src

securimage_show.php?sid=fa5e1eb19c3a534885632e

我有这个错误

生成验证码图片失败,内容已输出。这很可能是由于配置错误或向浏览器发送了 PHP 错误

有人知道吗?

注意:它适用于本地主机 wampserver 但不适用于远程服务器

编辑:

验证码开源代码中的代码生成 php 错误:

 protected function output()
{
    if ($this->canSendHeaders() || $this->send_headers == false) {
        if ($this->send_headers) {
            // only send the content-type headers if no headers have been output
            // this will ease debugging on misconfigured servers where warnings
            // may have been output which break the image and prevent easily viewing
            // source to see the error.
            header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
            header("Last-Modified: " . gmdate("D, d M Y H:i:s") . "GMT");
            header("Cache-Control: no-store, no-cache, must-revalidate");
            header("Cache-Control: post-check=0, pre-check=0", false);
            header("Pragma: no-cache");
        }

        switch ($this->image_type) {
            case self::SI_IMAGE_JPEG:
                if ($this->send_headers) header("Content-Type: image/jpeg");
                imagejpeg($this->im, null, 90);
                break;
            case self::SI_IMAGE_GIF:
                if ($this->send_headers) header("Content-Type: image/gif");
                imagegif($this->im);
                break;
            default:
                if ($this->send_headers) header("Content-Type: image/png");
                imagepng($this->im);
                break;
        }
    } else {
        echo '<hr /><strong>'
            .'Failed to generate captcha image, content has already been '
            .'output.<br />This is most likely due to misconfiguration or '
            .'a PHP error was sent to the browser.</strong>';
    }

    imagedestroy($this->im);
    restore_error_handler();

    if (!$this->no_exit) exit;
}
4

4 回答 4

3

快速解决:

只需替换 securimage.php 文件中的 canSendHeaders 函数

protected function canSendHeaders() {

    if (headers_sent()) {

        // output has been flushed and headers have already been sent
        return false;
    } else if (strlen((string) ob_get_contents()) > 0) {
        // headers haven't been sent, but there is data in the buffer that will break image and audio data
        return false;
    }

    return true;
}

protected function canSendHeaders() {

    ob_get_clean();

    if (headers_sent()) {

        // output has been flushed and headers have already been sent
        return false;
    } else if (strlen((string) ob_get_contents()) > 0) {
        // headers haven't been sent, but there is data in the buffer that will break image and audio data
        return false;
    }

    return true;
}
于 2014-07-11T08:25:25.890 回答
0

生成验证码图片失败,内容已输出。这很可能是由于配置错误或向浏览器发送了 PHP 错误

我认为您在 web.config 中缺少对 dll 的引用

于 2012-05-23T15:55:25.613 回答
0

今天早上我在一个月前完成的开发中遇到了同样的问题,今天部署时我忘记了我在 securimage.php 的顶部放置了一个回声,希望这可以帮助

于 2013-07-23T07:13:34.170 回答
0

从这个评估为false

if ($this->canSendHeaders() || $this->send_headers == false) {

output在调用该函数之前,您已经将内容发送到浏览器。

为了能够使用该功能,您必须确保没有向浏览器发送任何内容;<?php在开始标签之前没有空行或空格,没有echo语句等。

于 2012-05-23T16:37:26.780 回答