The 5.1.1 PHP release required a change in the Esendex PHP SDK files so that the SDK worked with the latest most secure version of PHP. Although the updated SDK should work with older versions of PHP (versions 4 and above), we strongly recommend that you update to the 5.1.1 PHP release.
The PHP SDK includes a number of example files to demonstrate the capabilities of the Esendex API. These files can be found in the 'Example Files' directory located in the SDK download.
The timeout period for all requests is set to 30 seconds and this should not need to be amended for all normal use of the Esendex services. If you wish to shorten or extend the timeout period, amend the EsendexFormPostUtils.php file to the value you require.
If a timeout period is reached, the method returns nothing.