PHP: How to get referrer URL? -

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i have page (only index) customers can send me emails , want see website visitor coming from?

how can referrer url php? tried $_server['http_referer'] it's empty time. how can this? thank you!

here $_server contains ("---- censored ----" censored me)

array(31) {   ["document_root"]=>   string(33) "/home/anything/public_html/design"   ["gateway_interface"]=>   string(7) "cgi/1.1"   ["http_accept"]=>   string(129) "text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/webp, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1"   ["http_accept_encoding"]=>   string(13) "gzip, deflate"   ["http_accept_language"]=>   string(14) "en-us,en;q=0.9"   ["http_cache_control"]=>   string(8) "no-cache"   ["http_connection"]=>   string(10) "keep-alive"   ["http_cookie"]=>   string(189) "__utma=76630272.1468291432.1367655794.1367669576.1367674157.3; __utmb=76630272.1.10.1367674157; __utmc=76630272; __utmz=76630272.1367655794.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)"   ["http_host"]=>   string(25) " ---- censored ---- "   ["http_user_agent"]=>   string(57) "opera/9.80 (windows nt 6.1) presto/2.12.388 version/12.15"   ["path"]=>   string(13) "/bin:/usr/bin"   ["query_string"]=>   string(0) ""   ["redirect_status"]=>   string(3) "200"   ["remote_addr"]=>   string(10) "5.15.68.79"   ["remote_port"]=>   string(5) "57897"   ["request_method"]=>   string(3) "get"   ["request_uri"]=>   string(12) "/referer.php"   ["script_filename"]=>   string(45) "/home/anything/public_html/design/referer.php"   ["script_name"]=>   string(12) "/referer.php"   ["server_addr"]=>   string(13) " ---- censored ---- "   ["server_admin"]=>   string(35) " ---- censored ---- "   ["server_name"]=>   string(25) " ---- censored ---- "   ["server_port"]=>   string(2) "80"   ["server_protocol"]=>   string(8) "http/1.1"   ["server_signature"]=>   string(189) " apache/2.2.19 (unix) mod_ssl/2.2.19 openssl/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 frontpage/5.0.2.2635 server @ ---- censored ---- port 80  "   ["server_software"]=>   string(125) "apache/2.2.19 (unix) mod_ssl/2.2.19 openssl/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 frontpage/5.0.2.2635"   ["unique_id"]=>   string(24) "uyuncupeidsaabkr2eyaaaaj"   ["php_self"]=>   string(12) "/referer.php"   ["request_time"]=>   int(1367674225)   ["argv"]=>   array(0) {   }   ["argc"]=>   int(0) }

$_server['http_referer'] give referrer page's url if there exists any. if users use bookmark or directly visit site manually typing in url, http_referer empty. if users posting page programatically (curl) they're not obliged set http_referer well. you're missing _, typo?


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