iconv_mime_decode_headers - PHP code example

The PHP Function Iconv_MIME_Decode_Headers()

PHP provides many built-in functions that can be used to perform a specific task. Functions are blocks of statements that can be called by a name, and when they are called they will execute automatically. They are usually defined with a curly () bracket around the function name, and they have one or more arguments. The arguments are referred to as parameters, and they can be a set of values, strings or any other data types.

The function iconv_mime_decode_headers() decodes a MIME header. It returns an associative array where each key represents a header name and the corresponding element represents a field value. The optional encoding parameter specifies the character set to represent the result. If omitted or null, iconv.internal_encoding will be used. mode determines the behaviour in the event that iconv_mime_decode_headers() encounters a malformed MIME header field. It can be a bitmask containing any combination of the following flags.

The iconv extension provides an interface to the iconv character set conversion facility, which allows you to turn a string that is represented by one set into a string that is represented by another set. This is important when you want to send and receive email with different encodings. The iconv extension also has many utility functions that can be useful for web developers.

iconv_mime_decode_headers example

if (!function_exists('iconv_get_encoding')) {
    function iconv_get_encoding(?string $type = 'all'): array|string|false { return p\Iconv::iconv_get_encoding((string) $type); }
}
if (!function_exists('iconv_set_encoding')) {
    function iconv_set_encoding(?string $type, ?string $encoding): bool { return p\Iconv::iconv_set_encoding((string) $type, (string) $encoding); }
}
if (!function_exists('iconv_mime_encode')) {
    function iconv_mime_encode(?string $field_name, ?string $field_value, ?array $options = []): string|false { return p\Iconv::iconv_mime_encode((string) $field_name, (string) $field_value, (array) $options); }
}
if (!function_exists('iconv_mime_decode_headers')) {
    function iconv_mime_decode_headers(?string $headers, ?int $mode = 0, ?string $encoding = null): array|false { return p\Iconv::iconv_mime_decode_headers((string) $headers, (int) $mode, $encoding); }
}

if (extension_loaded('mbstring')) {
    if (!function_exists('iconv_strlen')) {
        function iconv_strlen(?string $string, ?string $encoding = null): int|false { null === $encoding && $encoding = p\Iconv::$internalEncoding; return mb_strlen((string) $string, $encoding); }
    }
    if (!function_exists('iconv_strpos')) {
        function iconv_strpos(?string $haystack, ?string $needle, ?int $offset = 0, ?string $encoding = null): int|false { null === $encoding && $encoding = p\Iconv::$internalEncoding; return mb_strpos((string) $haystack, (string) $needle, (int) $offset, $encoding); }
    }
    if (!function_exists('iconv_strrpos')) {
        function iconv_strrpos(?string $haystack, ?string $needle, ?string $encoding = null): int|false { null === $encoding && $encoding = p\Iconv::$internalEncoding; return mb_strrpos((string) $haystack, (string) $needle, 0, $encoding); }
    }

// next is the standard new line         } else if ($EOL != "\r\n" && strpos($message, "\r\n\r\n")) {
            list($headers, $body) = explode("\r\n\r\n", $message, 2);
        // next is the other "standard" new line         } else if ($EOL != "\n" && strpos($message, "\n\n")) {
            list($headers, $body) = explode("\n\n", $message, 2);
        // at last resort find anything that looks like a new line         } else {
            @list($headers, $body) = @preg_split("%([\r\n]+)\\1%U", $message, 2);
        }

        $headers = iconv_mime_decode_headers($headers, ICONV_MIME_DECODE_CONTINUE_ON_ERROR);

        if ($headers === false ) {
            // an error occurs during the decoding             return;
        }

        // normalize header names         foreach ($headers as $name => $header) {
            $lower = strtolower($name);
            if ($lower == $name) {
                continue;
            }

if (!function_exists('iconv_get_encoding')) {
    function iconv_get_encoding($type = 'all') { return p\Iconv::iconv_get_encoding($type); }
}
if (!function_exists('iconv_set_encoding')) {
    function iconv_set_encoding($type, $encoding) { return p\Iconv::iconv_set_encoding($type, $encoding); }
}
if (!function_exists('iconv_mime_encode')) {
    function iconv_mime_encode($field_name, $field_value, $options = []) { return p\Iconv::iconv_mime_encode($field_name, $field_value, $options); }
}
if (!function_exists('iconv_mime_decode_headers')) {
    function iconv_mime_decode_headers($headers, $mode = 0, $encoding = null) { return p\Iconv::iconv_mime_decode_headers($headers, $mode, $encoding); }
}

if (extension_loaded('mbstring')) {
    if (!function_exists('iconv_strlen')) {
        function iconv_strlen($string, $encoding = null) { null === $encoding && $encoding = p\Iconv::$internalEncoding; return mb_strlen($string, $encoding); }
    }
    if (!function_exists('iconv_strpos')) {
        function iconv_strpos($haystack, $needle, $offset = 0, $encoding = null) { null === $encoding && $encoding = p\Iconv::$internalEncoding; return mb_strpos($haystack, $needle, $offset, $encoding); }
    }
    if (!function_exists('iconv_strrpos')) {
        function iconv_strrpos($haystack, $needle, $encoding = null) { null === $encoding && $encoding = p\Iconv::$internalEncoding; return mb_strrpos($haystack, $needle, 0, $encoding); }
    }