Are there any potential compatibility issues when developing in PHP 7 and hosting on a server that supports PHP 5.3 to 5.6?

When developing in PHP 7 and hosting on a server that supports PHP 5.3 to 5.6, there may be compatibility issues due to differences in syntax and features between the PHP versions. To solve this issue, it is recommended to develop and test the code on the lowest supported PHP version (in this case, PHP 5.3) to ensure compatibility. 

<?php
// Check PHP version
if (version_compare(PHP_VERSION, '5.3.0', '<')) {
    die('This script requires PHP 5.3 or higher');
}

// Your PHP 5.3+ compatible code here
?>

Keywords

PHP 7 compatibility server hosting version.

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