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@ 2016-01-13T12:05:09Z

<?php

function parseHeaders( $header )
    {
        $retVal = array();
        $fields = explode("\r\n", preg_replace('/\x0D\x0A[\x09\x20]+/', ' ', $header));
        foreach( $fields as $field ) {
            if( preg_match('/([^:]+): (.+)/m', $field, $match) ) {
                $match[1] = preg_replace('/(?<=^|[\x09\x20\x2D])./e', 'strtoupper("\0")', strtolower(trim($match[1])));
                if( isset($retVal[$match[1]]) ) {
                    if (!is_array($retVal[$match[1]])) {
                        $retVal[$match[1]] = array($retVal[$match[1]]);
                    }
                    $retVal[$match[1]][] = $match[2];
                } else {
                    $retVal[$match[1]] = trim($match[2]);
                }
            }
        }
        return $retVal;
    }
    
    $headers = "HTTP/1.1 200 OK\r\n".
    "content-type: text/html; charset=UTF-8\r\n".
    "Server: Funky/1.0\r\n".
    "Set-Cookie: foo=bar\r\n".
    "Set-Cookie: baz=quux\r\n".
    "Folded: works\r\n\ttoo\r\n";
    
    print_r(parseHeaders($headers));

Output for git.master, git.master_jit, rfc.property-hooks: Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /in/ae99i on line 9 Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /in/ae99i on line 9 Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /in/ae99i on line 9 Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /in/ae99i on line 9 Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /in/ae99i on line 9 Array ( [] => Array ( [0] => text/html; charset=UTF-8 [1] => Funky/1.0 [2] => foo=bar [3] => baz=quux [4] => works too ) )

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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