Php method for detecting the existence of remote files

Php method for detecting the existence of remote files

Function get_http_response_code ($ theURL ){ $ Headers = get_headers ($ theURL ); Return substr ($ headers [0], 9, 3 ); } ?> Get_headers is used to access a remote address and return the HTTP header sent by the server as an array. $ Header [0] indicates the status code returned by the server (if no exception occurs, the status code should be the first one ). Example of how to exclude redirection: /** * Fetches all the real headers sent by the server in response to a HTTP request without redirects * Obtain a header that does not contain redirection. */ Function get_real_headers ($ url, $ format = 0, $ follow_redirect = 0 ){ If (! $ Follow_redirect ){ // Set new default options $ Opts = array ('http' => Array ('max _ redirects' => 1, 'Ignore _ errors '=> 1) ); Stream_context_get_default ($ opts ); } // Get headers $ Headers = get_headers ($ url, $ format ); // Restore default options If (isset ($ opts )){ $ Opts = array ('http' => Array ('max _ redirects' => 20, 'Ignore _ errors '=> 0) ); Stream_context_get_default ($ opts ); } // Return Return $ headers; } ?>