Drupal 7 PHP version migration from PHP 5.3 to PHP 5.6 Our current Drupal 7 site runs on PHP 5.3 environment. But the server provider insisting to upgrade the PHP version to PHP 5.6 as they are about to end the support for PHP 5.3 and PHP 5.5 .

Is there any known issues for an existing Drupal 7 site migration into php 5.6?

Any tools/modules to check the version compatibility of current Drupal 7 in PHP 5.6 ?

Other than this any suggestion or advices prior to the migration ?
Is there any known issues for an existing Drupal 7 site migration into php 5.6?


For Drupal core specifically, that information will be in the issue queue. A quick search for "5.6" brings up no results. It it helps, I've been running D7 on 5.6 for ages now with no problems.

Contrib modules might be a different story, you'll need to check each of those individually, unless they offer that info specifically on the project page, or through a minimum PHP version specified in the module's .info file.


  Any tools/modules to check the version compatibility of current Drupal 7 in PHP 5.6 ?


Not Drupal-specific tools (it wouldn't make sense for there to be since this just a plain PHP question). You can probably make good use of something like PHPLint. Personally I would start with IDE tools (switch the language version to 5.6, run a validator, then check the current issue list for errors)


  Other than this any suggestion or advices prior to the migration ?


The only sane advice is for you to treat this as any other upgrade, whether that be code or server - make sure the site is fully tested in a development environment before pushing anything live. Have a plan in place to downgrade quickly on the live servers in case something goes wrong. If that's not an option (i.e. you don't control the server software), then re-double your testing efforts, and make sure server config is as identical as you can get it before pushing anything live.