PHP重定向的三种方式
Web系统中,从一个网页跳转到另一个网页,是LAMP项目中最常用的技术之一。页面跳转可能是由于用户单击链接、按钮等引发的,也可能是系统自动产生的。 此处介绍PHP中常用的实现页面自动跳转的方法。PHP页面跳转一、header()函数
header()函数是PHP中进行页面跳转的一种十分简单的方法。header()函数的主要功能是将HTTP协议标头(header)输出到浏览器。header()函数的定义如下:
void header (string string [,bool replace [,int http_response_code]])
可选参数replace指明是替换前一条类似标头还是添加一条相同类型的标头,默认为替换。
第二个可选参数http_response_code强制将HTTP相应代码设为指定值。 header函数中Location类型的标头是一种特殊的header调用,常用来实现页面跳转。注意:1.location和“:”号间不能有空格,否则不会跳转
2.在用header前不能有任何的输出。
3.header后的PHP代码还会被执行。例如,将浏览器重定向到lamp兄弟连官方论坛
< ?php //重定向浏览器 header("Location: http://bbs.lampbrother.net"); //确保重定向后,后续代码不会被执行 exit;?>
< meta http-equiv="refresh" content="1;url=http://bbs.lampbrother.net">
< ?php $url = "http://bbs.lampbrother.net"; ?> < html> < head> < meta http-equiv="refresh" content="1; url=< ?php echo $url; ?>"> < /head> < body> 页面只停留一秒…… < /body> < /html>
< ?php $url = "http://bbs.lampbrother.net"; echo "< script language='javascript' type='text/javascript'>"; echo "window.location.href='$url'"; echo "< /script>"; ?>
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