I can't find any real documentation on the quoted-printable-encode stream filter, but I've gathered info from several places. It seems there are 4 options that can be passed in the param array as in my other note on this subject:
line-length: integer, simply sets line length before a soft break is inserted
line-break-chars: Which char or chars to consider as a line break - note that "\r\n" will only match CRLF, not CR or LF, so make sure it matches your content.
binary: boolean, hex encodes all control chars, including spaces and line breaks, but leaves alphanumerics untouched
force-encode-first: Forcibly hex-encodes the first char on each line, even if it's alphanumeric. This is useful for avoiding corruption in some incompetent mail servers, like Exchange.
Stream Funzioni
Indice dei contenuti
- stream_bucket_append — Append bucket to brigade
- stream_bucket_make_writeable — Returns a bucket object from the brigade to operate on
- stream_bucket_new — Create a new bucket for use on the current stream
- stream_bucket_prepend — Prepend bucket to brigade
- stream_context_create — Creates a stream context
- stream_context_get_default — Retrieve the default stream context
- stream_context_get_options — Retrieve options for a stream/wrapper/context
- stream_context_get_params — Retrieves parameters from a context
- stream_context_set_default — Set the default stream context
- stream_context_set_option — Sets an option for a stream/wrapper/context
- stream_context_set_options — Sets options on the specified context
- stream_context_set_params — Set parameters for a stream/wrapper/context
- stream_copy_to_stream — Copies data from one stream to another
- stream_filter_append — Attach a filter to a stream
- stream_filter_prepend — Attach a filter to a stream
- stream_filter_register — Register a user defined stream filter
- stream_filter_remove — Remove a filter from a stream
- stream_get_contents — Reads remainder of a stream into a string
- stream_get_filters — Retrieve list of registered filters
- stream_get_line — Gets line from stream resource up to a given delimiter
- stream_get_meta_data — Retrieves header/meta data from streams/file pointers
- stream_get_transports — Retrieve list of registered socket transports
- stream_get_wrappers — Retrieve list of registered streams
- stream_is_local — Checks if a stream is a local stream
- stream_isatty — Check if a stream is a TTY
- stream_notification_callback — A callback function for the notification context parameter
- stream_register_wrapper — Alias di stream_wrapper_register
- stream_resolve_include_path — Resolve filename against the include path
- stream_select — Runs the equivalent of the select() system call on the given arrays of streams with a timeout specified by seconds and microseconds
- stream_set_blocking — Set blocking/non-blocking mode on a stream
- stream_set_chunk_size — Set the stream chunk size
- stream_set_read_buffer — Set read file buffering on the given stream
- stream_set_timeout — Set timeout period on a stream
- stream_set_write_buffer — Sets write file buffering on the given stream
- stream_socket_accept — Accept a connection on a socket created by stream_socket_server
- stream_socket_client — Open Internet or Unix domain socket connection
- stream_socket_enable_crypto — Turns encryption on/off on an already connected socket
- stream_socket_get_name — Retrieve the name of the local or remote sockets
- stream_socket_pair — Creates a pair of connected, indistinguishable socket streams
- stream_socket_recvfrom — Receives data from a socket, connected or not
- stream_socket_sendto — Sends a message to a socket, whether it is connected or not
- stream_socket_server — Create an Internet or Unix domain server socket
- stream_socket_shutdown — Shutdown a full-duplex connection
- stream_supports_lock — Tells whether the stream supports locking
- stream_wrapper_register — Register a URL wrapper implemented as a PHP class
- stream_wrapper_restore — Restores a previously unregistered built-in wrapper
- stream_wrapper_unregister — Unregister a URL wrapper
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User Contributed Notes 2 notes
marcus at synchromedia dot co dot uk ¶
17 years ago
marcus at synchromedia dot co dot uk ¶
18 years ago
As this article says, there is no quoted_printable_encode function() in PHP: http://www.zend.com/manual/filters.convert.php
However there is a stream filter for quoted printable encoding. Here's an example function that produces output suitable for email and doesn't explicitly use external files (though it might do for strings over 2Mb due to the nature of the temp stream type):
<?php
function quoted_printable_encode($string) {
$fp = fopen('php://temp/', 'r+');
$params = array('line-length' => 70, 'line-break-chars' => "\r\n");
stream_filter_append($fp, 'convert.quoted-printable-encode', STREAM_FILTER_READ, $params);
fputs($fp, $string);
rewind($fp);
return stream_get_contents($fp);
}
echo quoted_printable_encode(str_repeat("hello there ", 50)." a=1\r\n")."\n";
?>
The filter needs to be restricted to STREAM_FILTER_READ because by default it will get filtered both going into and out of the stream, and will thus get encoded twice.
It should be much faster than using a PHP implementation of the same thing, though note that this will only work in PHP 5.1+.
