Zend_Mime is a support class for handling multipart MIME messages. It is used by Zend_Mail and Zend_Mime_Message and may be used by applications requiring MIME support. Zend_Mime provides a simple set of static helper methods to work with MIME: Zend_Mime::isPrintable(): Returns TRUE if the given string contains no unprintable characters, FALSE otherwise. Zend_Mime::encode(): Encodes a string with specified encoding. Zend_Mime::encodeBase64(): Encodes a string into base64 encoding. Zend_Mime::encodeQuotedPrintable(): Encodes a string with the quoted-printable mechanism. Zend_Mime::encodeBase64Header(): Encodes a string into base64 encoding for Mail Headers. Zend_Mime::encodeQuotedPrintableHeader(): Encodes a string with the quoted-printable mechanism for Mail Headers. Zend_Mime defines a set of constants commonly used with MIME Messages: Zend_Mime::TYPE_OCTETSTREAM: 'application/octet-stream' Zend_Mime::TYPE_TEXT: 'text/plain' Zend_Mime::TYPE_HTML: 'text/html' Zend_Mime::ENCODING_7BIT: '7bit' Zend_Mime::ENCODING_8BIT: '8bit' Zend_Mime::ENCODING_QUOTEDPRINTABLE: 'quoted-printable' Zend_Mime::ENCODING_BASE64: 'base64' Zend_Mime::DISPOSITION_ATTACHMENT: 'attachment' Zend_Mime::DISPOSITION_INLINE: 'inline' Zend_Mime::MULTIPART_ALTERNATIVE: 'multipart/alternative' Zend_Mime::MULTIPART_MIXED: 'multipart/mixed' Zend_Mime::MULTIPART_RELATED: 'multipart/related' When Instantiating a Zend_Mime Object, a MIME boundary is stored that is used for all subsequent non-static method calls on that object. If the constructor is called with a string parameter, this value is used as a MIME boundary. If not, a random MIME boundary is generated during construction time. A Zend_Mime object has the following Methods: boundary(): Returns the MIME boundary string. boundaryLine(): Returns the complete MIME boundary line. mimeEnd(): Returns the complete MIME end boundary line.