note 126885 added to function.get-headers

When requesting headers as an associative array, it's important to note that headers with different casing will NOT be treated as equal. If your first redirect contains a "location" header, and your second contains a "Location" header (note the uppercase L), these will appear as two different keys in your associative array. The following is one attempt at creating an alternative to get_headers which normalizes the header names, while also offering the same functionality (with the same signature) as the native get_headers function: <?php function getHeaders ( string $location, bool $associative = true, $context = null ) : array | bool { $indexer = 0; $results = []; $headers = get_headers( $location, false, $context ); if ( $headers ) { foreach ( $headers as $header ) { if ( strpos( $header, ":" ) ) { $parts = explode( ":", $header, 2 ); $key = strtolower( $parts[0] ); $value = trim( $parts[1] ); if ( !$associative ) { $results[ $indexer++ ] = "{$key}: {$value}"; continue; } /** * If the header name hasn't yet been encountered, we * add it to the results array, storing the value as * a string. * * If the header name has been encountered already (it * has already been stored in the results array), and * is an array, we'll push the current value. * * If the header name has been encountered, but currently * points to a string, we will replace with an array, but * keep the original string at index 0. */ if ( !key_exists( $key, $results ) ) { $results[ $key ] = $value; } else if ( is_array( $results[ $key ] ) ) { array_push( $results[ $key ], $value ); } else { $results[ $key ] = [ $results[ $key ], $value ]; } continue; } // No ':' found in the header, so we'll preserve as-is. $results[ $indexer++ ] = $header; } return $results; } return false; } ?> ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.135 (proxied: 2600:1700:2ab0:37b8:6cff:82c9:eb9a:41ef) ---- Manual Page -- https://php.net/manual/en/function.get-headers.php Edit -- https://main.php.net/note/edit/126885 Del: integrated -- https://main.php.net/note/delete/126885/integrated Del: useless -- https://main.php.net/note/delete/126885/useless Del: bad code -- https://main.php.net/note/delete/126885/bad+code Del: spam -- https://main.php.net/note/delete/126885/spam Del: non-english -- https://main.php.net/note/delete/126885/non-english Del: in docs -- https://main.php.net/note/delete/126885/in+docs Del: other reasons-- https://main.php.net/note/delete/126885 Reject -- https://main.php.net/note/reject/126885 Search -- https://main.php.net/manage/user-notes.php