(转)PHP5使用cookie时报错 cannot modify header information - headers already sent by (......)

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(转)PHP5使用cookie时报错 cannot modify header information - headers already sent by (......)

转自:http://blog.csdn.net/buyingfei8888/article/details/8899797 运行有警告Warning: Cannot modify header information - headers already sent by 下面是别人建议方法一:在PHP里Cookie的使用是有一些限制的.1.使用setcookie必须在<html>标签之前2.使用setcookie之前,不可以使用echo输入内容3.直到网页被加载完后,cookie才会出现4.s…

php5.6,Ajax报错，Warning: Cannot modify header information - headers already sent in Unknown on line 0

php5.6ajax报错 Deprecated: Automatically populating $HTTP_RAW_POST_DATA is deprecated and will be removed in a future version. To avoid this warning set 'always_populate_raw_post_data' to '-1' in php.ini and use the php://input stream instead. in Unkno…

php 报错 Cannot modify header information

在用CI 开发微信公众号的时候出现下面这么个问题,网上看了一圈解决办法是:把报错的文件用editplus另存为utf-8. Severity: Warning Message: Cannot modify header information - headers already sent by (output started at Filename: libraries/Session.php Line Number: 688 因为每个页面都报上面的错,所以我估计是CI根目录下的index.ph…

关于报错:Warning: Cannot modify header information - headers already sent by (output started at

8月5日,第一个项目即将完成,测试时,发现登录功能会出现小问题:记住密码的时候会报错 Warning: Cannot modify header information - headers already sent by (output started at 经过再三在百度上查询,终于查到错误的关键原因:[setcookie之前不可以有html标签内容].导致出现这种错误的方式有很多种,但惟独这种解释最让我理解. (因为百度知道的内容不可以复制了,只能贴出地址,有详细解释)地址[http://z…

php有些系统会报错或提示 Cannot modify header information - headers already sent by

Warning: Cannot modify header information - headers already sent by (output started at /home/test/domains/test.nl/public_html/wp-content/themes/mugen/engine/theme-scripts.php:1) in /home/test/domains/test.nl/public_html/wp-content/plugins/woocommerce…

PHP错误Warning: Cannot modify header information - headers already sent by解决方法

这篇文章主要介绍了PHP错误Warning: Cannot modify header information - headers already sent by解决方法,需要的朋友可以参考下今天在测试以下代码时遇到该错误: 复制代码代码如下: session_start();$_SESSION['username']=$username;echo "<script language='javascript'>location.href='../admin.php';</sc…

Warning: Cannot modify header information - headers already sent by (output started at

一般来说在header函数前不能输出html内容,类似的还有setcookie() 和 session 函数,这些函数需要在输出流中增加消息头部信息.如果在header()执行之前有echo等语句,当后面遇到header()时,就会报出 “Warning: Cannot modify header information - headers already sent by ....”错误.就是说在这些函数的前面不能有任何文字.空行.回车等,而且最好在header()函数后加上exit()函数.例…