意外的头部空白行或输出和Cookie设置问题_PHP教程

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了意外的头部空白行或输出和Cookie设置问题_PHP教程，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含1702字，纯文字阅读大概需要3分钟。

内容图文

The PHP setcookie() and header() should be called before ANY browser output. If there are any echo or print calls, or any accidental whitespaces, those functions just won’t work. If it works on your localhost (strangely it does under some conditions!) but not on your server, check for the no-output-before-headers violations and fix them to get them working.

Explanation
HTTP headers should be sent before any HTTP content, else they will not work. The PHP header() function is used for sending standard as well as custom HTTP headers, so naturally they should be called before any browser output. setcookie() is a wrapper function to header(‘Set-Cookie:’), so ultimately it’s a header() call, so setcookie() too will not work if it’s called after any browser output.

Notes

The PHP header() function is used for sending standard as well as custom HTTP headers
header() should be called before any browser output
setcookie() should be called before any browser output
setcookie() is a wrapper function to header(‘Set-Cookie:’)
html">http://www.hacksparrow.com/php-setcookie-or-php-headerlocation-not-working-with-solution.html

额外提示:

这是为什么最好不要在PHP文件的末尾使用关闭符号

echo hello world;

?>

的原因，因为很可能在这个关闭行之外输入以外的空白行、空白符

http://www.bkjia.com/PHPjc/478817.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/478817.htmlTechArticlePHP setcookie() or PHP header(‘Location:’) Not Working – With SolutionThe setcookie() or header() functions of PHP does not work at all! The PHP setcookie() and header() shou...

内容总结

以上是互联网集市为您收集整理的意外的头部空白行或输出和Cookie设置问题_PHP教程全部内容，希望文章能够帮你解决意外的头部空白行或输出和Cookie设置问题_PHP教程所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。

内容备注

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。

内容手机端