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header -- ·¢ËÍÒ»¸öԭʼ HTTP ±êÍ·
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void header ( string string [, bool replace [, int http_response_code]] )
header() º¯ÊýÓÃÀ´·¢ËÍÒ»¸öԭʼ HTTP ±êÍ·¡£ÓÐ¹Ø HTTP ±êÍ·µÄ¸ü¶àÄÚÈݼû HTTP/1.1 ¹æ·¶¡£
¿ÉÑ¡²ÎÊý replace Ö¸Ã÷ÊÇÌæ»»µôÇ°Ò»ÌõÀàËƵıêÍ·»¹ÊÇÔö¼ÓÒ»ÌõÏàͬÀàÐ͵ıêÍ·¡£Ä¬ÈÏΪÌæ»»£¬µ«Èç¹û½«ÆäÉèΪ FALSE Ôò¿ÉÒÔÇ¿ÖÆ·¢ËͶà¸öͬÀà±êÍ·¡£ÀýÈç:
<?php
header('WWW-Authenticate: Negotiate');
header('WWW-Authenticate: NTLM', false);
?>
µÚ¶þ¸ö¿ÉÑ¡²ÎÊý http_response_code Ç¿Öƽ« HTTP ÏìÓ¦´úÂëÉèΪָ¶¨Öµ£¨´Ë²ÎÊýÊÇ PHP 4.3.0 мӵģ©¡£
ÓÐÁ½ÖÖÌØÊâµÄ header µ÷ÓᣵÚÒ»ÖÖÊDZêÍ·ÒÔ×Ö·û´®“HTTP/”£¨´óСд²»ÖØÒª£©¿ªÍ·µÄ£¬¿ÉÒÔÓÃÀ´È·¶¨Òª·¢Ë굀 HTTP ״̬Âë¡£ÀýÈ磬Èç¹ûÅäÖÃÁË Apache Óà PHP À´´¦ÀíÕÒ²»µ½ÎļþµÄ´íÎó´¦ÀíÇëÇó£¨Ê¹Óà ErrorDocument Ö¸Á£¬ÐèҪȷ±£½Å±¾²úÉúÁËÕýÈ·µÄ״̬Âë¡£
<?php
header("HTTP/1.0 404 Not Found")
?>
×¢: HTTP ״̬Âë±êÍ·ÐÐ×ÜÊǵÚÒ»¸ö±»·¢Ë͵½¿Í»§¶Ë£¬¶ø²¢²»¹Üʵ¼ÊµÄ header() µ÷ÓÃÊÇ·ñÊǵÚÒ»¸ö¡£³ý·Ç HTTP ±êÍ·ÒѾ­·¢ËͳöÈ¥£¬ÈκÎʱºò¶¼¿ÉÒÔͨ¹ýÓÃеÄ״̬Ðе÷Óà header() º¯ÊýÀ´¸²¸ÇÔ­Ïȵġ£
µÚ¶þÖÖÌØÊâÇé¿öÊÇÒÔ“Location:”±êÍ·¡£Ëü²»Ö»ÊÇ°ÑÕâ¸ö±êÍ··¢ËÍ»Øä¯ÀÀÆ÷£¬Ëü»¹½«Ò»¸ö REDIRECT£¨302£©×´Ì¬Âë·µ»Ø¸øä¯ÀÀÆ÷£¬³ý·Ç֮ǰÒѾ­·¢³öÁËij¸ö 3xx ״̬Âë¡£
<?php
header("Location: http://www.example.com/"); /* Öض¨Ïòä¯ÀÀÆ÷ */
/* È·±£Öض¨Ïòºó£¬ºóÐø´úÂë²»»á±»Ö´ÐÐ */
exit;
?>
×¢: HTTP/1.1 ±ê×¼ÐèÒªÒ»¸ö¾ø¶ÔµØÖ·µÄ URI ×öΪ Location: µÄ²ÎÊý, µ«ÓÐһЩ¿Í»§¶ËÖ§³ÖÏà¶Ô URI¡£Í¨³£¿ÉÒÔʹÓà $_SERVER['HTTP_HOST']¡¢$_SERVER['PHP_SELF'] ¼° dirname() º¯ÊýÀ´×Ô¼º´ÓÏà¶Ô URI ²úÉú³ö¾ø¶Ô URI£º
<?php
header("Location: http://".$_SERVER['HTTP_HOST']
                        . rtrim(dirname($_SERVER['PHP_SELF']), '/\\')
                       ."/".$relative_url);
?>
×¢: ¼´Ê¹ÆôÓÃÁË session.use_trans_sid£¬Sess


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