Important: Connection::send() Timeout error message changed from "Timed out listening for response from server" to "Response partially received. Timed out listening for end-of-message from server"
Important: Supported PHP version has been updated to 7.2+. To use this package with 7.0 or 7.1, use previous release 1.5.4
Important: Exception message for invalid segment name changed to "Segment name '$name' should be 3 characters and in uppercase"
A PHP-based HL7 v2.x Parsing, Generation and Sending library, inspired from the famous Perl Net-HL7 package.
composer require aranyasen/hl7
// Create a Message object from a HL7 string
$msg = new Message("MSH|^~\\&|1|\rPID|||abcd|\r"); // Either \n or \r can be used as segment endings
$pid = $msg->getSegmentByIndex(1);
echo $pid->getField(3); // prints 'abcd'
echo $msg->toString(true); // Prints entire HL7 string
// Get the first segment
$msg->getFirstSegmentInstance('PID'); // Returns the first PID segment. Same as $msg->getSegmentsByName('PID')[0];
// Check if a segment is present in the message object
$msg->hasSegment('PID'); // return true or false based on whether PID is present in the $msg object
// Check if a message is empty
$msg = new Message();
$msg->isempty(); // Returns true
// Create an empty Message object, and populate MSH and PID segments...
$msg = new Message();
$msh = new MSH();
$msg->addSegment($msh); // Message is: "MSH|^~\&|||||20171116140058|||2017111614005840157||2.3|\n"
// Create any custom segment
$abc = new Segment('ABC');
$abc->setField(1, 'xyz');
$abc->setField(4, ['']); // Set an empty field at 4th position. 2nd and 3rd positions will be automatically set to empty
$msg->setSegment($abc, 1); // Message is now: "MSH|^~\&|||||20171116140058|||2017111614005840157||2.3|\nABC|xyz|\n"
// Create a defined segment (To know which segments are defined in this package, look into Segments/ directory)
// Advantages of defined segments over custom ones (shown above) are 1) Helpful setter methods, 2) Auto-incrementing segment index
$pid = new PID(); // Automatically creates PID segment, and adds segment index at PID.1
$pid->setPatientName([$lastname, $firstname, $middlename, $suffix]); // Use a setter method to add patient's name at standard position (PID.5)
$pid->setField('abcd', 5); // Apart from standard setter methods, you can manually set a value at any position too
unset $pid; // Destroy the segment and decrement the id number. Useful when you want to discard a segment.
// Creating multiple message objects may have an unexpected side-effect: segments start with wrong index values (Check tests/MessageTest for explanation)...
// Use 4th argument as true, or call resetSegmentIndices() on $msg object to reset segment indices to 1
$msg = new Message("MSH|^~\&|||||||ORM^O01||P|2.3.1|", null, true, true);
// ... any segments added here will now start index from 1, as expected.
// Sometimes you may want to have exact index values, rather than auto-incrementing for each instance of a segment
// Use 5th argument as false...
$hl7String = "MSH|^~\&|||||||ORU^R01|00001|P|2.3.1|\n" . "OBX|1||11^AA|\n" . "OBX|1||22^BB|\n";
$msg = new Message($hl7String, null, true, true, false); // $msg contains both OBXs with given indexes in the string
// Create a segment with empty sub-fields retained
$msg = new Message("MSH|^~\\&|1|\rPV1|1|O|^AAAA1^^^BB|", null, true); // Third argument 'true' forces to keep all sub fields
$pv1 = $msg->getSegmentByIndex(1);
$fields = $pv1->getField(3); // $fields is ['', 'AAAA1', '', '', 'BB']
// Create/send message with segment-ending bar character (|) removed
$msg = new Message("MSH|^~\\&|1|\nABC|||xxx\n", ['SEGMENT_ENDING_BAR' => false]);
$msg->toString(true); // Returns "MSH|^~\&|1\nABC|||xxx\n"
(new Connection($ip, $port))->send($msg); // Sends the message without ending bar-characters (details on Connection below)
// Specify custom values for separators, HL7 version etc.
$msg = new Message("MSH|^~\\&|1|\rPV1|1|O|^AAAA1^^^BB|", ['SEGMENT_SEPARATOR' => '\r\n', 'HL7_VERSION' => '2.3']);
$ip = '127.0.0.1'; // An IP
$port = '12001'; // And Port where a HL7 listener is listening
$message = new Message($hl7String); // Create a Message object from your HL7 string
// Create a Socket and get ready to send message. Optionally add timeout in seconds as 3rd argument (default: 10 sec)
$connection = new Connection($ip, $port);
$response = $connection->send($message); // Send to the listener, and get a response back
echo $reponse->toString(true); // Prints ACK from the listener
Handle ACK message returned from a remote HL7 listener...
$ack = (new Connection($ip, $port))->send($message); // Send a HL7 to remote listener
$returnString = $ack->toString(true);
if (strpos($returnString, 'MSH') === false) {
echo "Failed to send HL7 to 'IP' => $ip, 'Port' => $port";
}
$msa = $ack->getSegmentsByName('MSA')[0];
$ackCode = $msa->getAcknowledgementCode();
if ($ackCode[1] === 'A') {
echo "Recieved ACK from remote\n";
}
else {
echo "Recieved NACK from remote\n";
echo "Error text: " . $msa->getTextMessage()
}
This package exposes a number of public methods for convenient HL7 handling. Some examples are:
- Considering you have a Message object (say,
$msg = new Message(file_get_contents('somefile.hl7'));
)
$msg->toFile('/path/to/some.hl7'); // Write to a file
$msg->isOru(); // Check if it's an ORU
$msg->isOrm(); // Check if it's an ORM
Visit docs\README for details on available APIs
All segment level getter/setter APIs can be used in two ways -
-
If a position index isn't provided as argument (1st argument for getters, 2nd for setters), a standard index is used.
$pid->setPatientName('John Doe')
-> Set patient name at position 5 as per HL7 v2.3 standard
$pid->getPatientAddress()
-> Get patient address from standard 11th position -
To use a custom position index, provide it in the argument:
$pid->setPatientName('John Doe', 6)
-> Set patient name at 6th position in PID segment
$pid->getPatientAddress(12)
-> Get patient address from 12th position
- Data Validation
- Search by regex and return segment/field/index
- Define more segments