This library was developed based on Onlinecity and improved for use in MVC standard projects.

This is a simplified SMPP client lib for sending or receiving smses through SMPP v3.4.

In addition to the client, this lib also contains an encoder for converting UTF-8 text to the GSM 03.38 encoding, and a socket wrapper. The socket wrapper provides connection pool, IPv6 and timeout monitoring features on top of PHP's socket extension.

This lib requires the sockets PHP-extension, and is not supported on Windows. A windows-compatible version is also available.

• You can’t connect as a transceiver, otherwise supported by SMPP v.3.4
• The SUBMIT_MULTI operation of SMPP, which sends a SMS to a list of recipients, is not supported atm. You can easily add it though
• The sockets will return false if the timeout is reached on read() (but not readAll or write) You can use this feature to implement an enquire_link policy. If you need to send enquire_link for every 30 seconds of inactivity, set a timeout of 30 seconds, and send the enquire_link command after $smpp -> read() returns false
• Multipart/alternative emails for mail clients that do not read HTML email
• Add attachments, including inline
• Support for UTF-8 content and 8bit, base64, binary, and quoted-printable encodings
• SMPP authentication with LOGIN mechanisms over Sockets transports
• Protect against header injection attacks
• Compatible with PHP 5.5 and later
• Namespaced to prevent name clashes

This software is distributed under the LGPL 2.1 license, along with the GPL Cooperation Commitment. Please read LICENSE for information on the software availability and distribution.

PHPSMPP is available on Packagist (using semantic versioning), and installation via Composer is the recommended way to install PHPSMPP. Just add this line to your composer.json file:

"seasonsolution/phpsmpp": "*.*"

or run

composer require seasonsolution/phpsmpp

Note that the vendor folder and the vendor/autoload.php script are generated by Composer; they are not part of PHPSMPP.

To send a SMS you can do:

<?php
// Import PHPSMPP classes into the global namespace
// These must be at the top of your script, not inside a function
use seasonsolution\phpsmpp\smpplib;
use seasonsolution\phpsmpp\smppclient;
use seasonsolution\phpsmpp\gsmencoder;
use seasonsolution\phpsmpp\sockettransport;

//Load Composer's autoloader
require 'vendor/autoload.php';

$smpp = new smpplib();

// Server settings
$smpp -> host = 'smsc-sim.smscarrier.com';    // Specify main SMPP server
$smpp -> port = 2775;                   // SMPP port to connect to
$smpp -> username = 'test';             // SMPP username
$smpp -> password = 'test';            // SMPP password
$smpp -> timeout = 10000;               // By default value, it is optional.
$smpp -> debug = true;                  // Enable verbose debug output

// Recipient
$smpp -> datacoding = 'SMPP Test';
$smpp -> numberTo = '+15417543010';

// Content
$smpp -> message = 'H€llo world, this is my sms message.';

$smsConfirm = $smpp -> send();          // Code to confirmation sent sms

// Print a SMS confirm sent
echo $smsConfirm;

To receive a SMS (or delivery receipt):

<?php
// Import PHPSMPP classes into the global namespace
// These must be at the top of your script, not inside a function
use seasonsolution\phpsmpp\smpplib;
use seasonsolution\phpsmpp\smppclient;
use seasonsolution\phpsmpp\sockettransport;

//Load Composer's autoloader
require 'vendor/autoload.php';

$smpp = new smpplib();

// Server settings
$smpp -> host = 'smsc-sim.smscarrier.com';    // Specify main SMPP server
$smpp -> port = 2775;                   // SMPP port to connect to
$smpp -> username = 'test';             // SMPP username
$smpp -> password = 'test';            // SMPP password
$smpp -> timeoutReceive = 60000;               // By default value, it is optional.
$smpp -> debug = true;                  // Enable verbose debug output

// Read SMS and output
$sms = $smpp -> read();

You can specify a list of connections to have the SocketTransport attempt each one in succession or randomly. Also if you give it a hostname with multiple A/AAAA-records it will try each one. If you want to monitor the DNS lookups, set defaultDebug to true before constructing the transport.

The (configurable) send timeout governs how long it will wait for each server to timeout. It can take a long time to try a long list of servers, depending on the timeout. You can change the timeout both before and after the connection attempts are made.

The transport supports IPv6 and will prefer IPv6 addresses over IPv4 when available. You can modify this feature by setting forceIpv6 or forceIpv4 to force it to only use IPv6 or IPv4.

In addition to the DNS lookups, it will also look for local IPv4 addresses using gethostbyname(), so "localhost" works for IPv4. For IPv6 localhost specify "::1".

Can I use this to send messages from my website?
Not on it's own, no. After PHP processes the request on a website, it closes all connections. Most SMPP providers do not want you to open and close connections, you should keep them alive and send enquire_link commands periodically. Which means you probably need to get some kind of long running process, ie. using the process control functions, and implement a form of queue system which you can push to from the website. This requires shell level access to the server, and knowledge of unix processes.

How do I receive delivery receipts or SMS'es?
To receive a delivery receipt or a SMS you must connect a receiver in addition to the transmitter. This receiver must wait for a delivery receipt to arrive, which means you probably need to use the process control functions.

We do have an open source implementation at php-smpp-worker you can look at for inspiration, but we cannot help you with making your own. Perhaps you should look into if your SMSC provider can give you a HTTP based API or using turnkey software such as kannel, this project provides the protocol implementation only and a basic socket wrapper.

I can't send more than 160 chars
There are three built-in methods to send Concatenated SMS (csms); CSMS_16BIT_TAGS, CSMS_PAYLOAD, CSMS_8BIT_UDH. CSMS_16BIT_TAGS is the default, if it don't work try another.

Is this lib compatible with PHP 5.2.x ?
It's tested on PHP 5.3, but is known to work with 5.2 as well.

Can it run on windows?
It requires the sockets extension, which is available on windows, but is incomplete. Use the windows-compatible version instead, which uses fsockopen and stream functions.

Why am I not seeing any debug output?
Remember to implement a debug callback for SocketTransport and SmppClient to use. Otherwise they default to error_log which may or may not print to screen.

Why do I get 'res_nsend() failed' or 'Could not connect to any of the specified hosts' errors?
Your provider's DNS server probably has an issue with IPv6 addresses (AAAA records). Try to set SocketTransport::$forceIpv4=true;. You can also try specifying an IP-address (or a list of IPs) instead. Setting SocketTransport:$defaultDebug=true; before constructing the transport is also useful in resolving connection issues.

I tried forcing IPv4 and/or specifying an IP-address, but I'm still getting 'Could not connect to any of the specified hosts'?
It would be a firewall issue that's preventing your connection, or something else entirely. Make sure debug output is enabled and displayed. If you see something like 'Socket connect to 1.2.3.4:2775 failed; Operation timed out' this means a connection could not be etablished. If this isn't a firewall issue, you might try increasing the connect timeout. The sendTimeout also specifies the connect timeout, call $transport->setSendTimeout(10000); to set a 10-second timeout.

Why do I get 'Failed to read reply to command: 0x4', 'Message Length is invalid' or 'Error in optional part' errors?
Most likely your SMPP provider doesn't support NULL-terminating the message field. The specs aren't clear on this issue, so there is a toggle. Set SmppClient::$sms_null_terminate_octetstrings = false; and try again.

What does 'Bind Failed' mean?
It typically means your SMPP provider rejected your login credentials, ie. your username or password.

Can I test the client library without a SMPP server?
SMSCarrier has made available an online service to test the sending of SMS. Use this service to test on your application, see on SMSCarrier.

I have an issue that not mentioned here, what do I do?
Please obtain full debug information, and open an issue here on github. Make sure not to include the Send PDU hex-codes of the BindTransmitter call, since it will contain your username and password. Other hex-output is fine, and greatly appeciated. Any PHP Warnings or Notices could also be important. Please include information about what SMPP server you are connecting to, and any specifics.

Please submit bug reports, suggestions and pull requests to the GitHub issue tracker.

We are working to implement the translations in the debugger and Validates number mobile automatically.

We're particularly interested in fixing edge-cases, expanding test coverage.

If you found a mistake in the docs, or want to add something, go ahead and amend the wiki - anyone can edit it.

If you have git clones from prior to the move to the PHPSMPP GitHub organisation, you'll need to update any remote URLs referencing the old GitHub location with a command like this from within your clone:

git remote set-url upstream https://github.com/seasonsolution/phpsmpp.git