You do not really have any other option besides IMAP, unless you want to pair with specific services like Exchange Web Services.
PHP has a very comprehensive set of functions regarding IMAP. I would suggest checking it out. Unfortunately, there is not really anything you can do from within PHP to prevent having to poll.
My suggestion is checking in the background if new mails have arrived. For example by checking from within a cronjob. That way you don't have to initiate a new connection to an IMAP server every time a users visits the page.
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PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites.
The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
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Laravel is a free open source PHP framework that came out in 2011. Since then, it has been able to become the framework of choice for web developers. One of the main reasons for this is that Laravel makes it easier, faster, and safer to develop complex web applications than any other framework.
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