regarding joomla template installation - joomla

I have an error message while installing a template in joomla m using wamp 2.1 and joomla 3.0.3 .
the error code is
Fatal error: Call to undefined method JRegistry::getValue() in C:\wamp\www\Joomla\templates\blackwhite\icetools\default.php on line 284

JRegistry::getValue() was previously deprecated and removed in Joomla 3.x. It should be changed to JRegistry::get() instead. Please see http://docs.joomla.org/Potential_backward_compatibility_issues_in_Joomla_3_and_Joomla_Platform_12.2#JRegistry

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Getting error when a project developed in Laravel 5.0 & PHP 5.6 version version, trying to run in PHP 7.2 version

When I set up the Laravel 5.0 version project in PHP 7.2 I am getting following error. Please help me how to run this in PHP 7.2 version or is there any other way.
ErrorException in EncryptionServiceProvider.php line 16: Use of
undefined constant MCRYPT_RIJNDAEL_128 - assumed 'MCRYPT_RIJNDAEL_128'
(this will throw an Error in a future version of PHP)

Trying to update gantry package, get this error

I am following instructions elsewhere to upgrade Joomla from 2.5.x to 2.5.28 in preparation to upgrade to 3.5.
The install, and DB steps went fine. 2 package updates were fine, but when I try to do Gantry to 4.1.33, whether through update or install, it throws this error:
Fatal error: Call to undefined method JInstallerPackage::getManifest() in /home1/someuser/public_html/joomlatest/tmp/install_599de020ec6ed/install.php on line 75
Any suggestions?
Thanks
JimR

laravel 5.1 + phpdesktop gives fatal error: Call to undefined function mb_internal_encoding()

I am trying to use Laravel 5.1 with phpdesktop (https://github.com/cztomczak/phpdesktop). I configured everything according to instructions but I get a fatal error for the first page itself.
Fatal error: Call to undefined function Illuminate\Foundation\Bootstrap\mb_internal_encoding() in H:\app\laravel\www\vendor\laravel\framework\src\Illuminate\Foundation\Bootstrap\LoadConfiguration.php on line 43
I am unable to solve this problem. Both PHPDesktop and laravel versions are latest ones.
You need to install mbstring extension for PHP.
Check Enable mbstring extension on Windows

Upgrade from Joomla 2.5 - 3.4 gives error

I get this error after doing upgrade from Joomla 2.5 to 3.4
Fatal error: Call to a member function get() on a non-object in /home/rodoyo/public_html/administrator/components/com_installer/controller.php on line 37
I can find that line in my php config file but don't know what to change
Any ideas?

Fatal error Call to undefined method VmVendorPDF::convertHTMLColorToDec()

I have updated the latest version of Virtuemart 2.0.24c, once the payment get completed it shows the below error
Fatal error Call to undefined method VmVendorPDF::convertHTMLColorToDec()
I found the solution for the issue, updated the latest version of ext_aio file.
Extract the ext_aio.tar file and then make a zip, after that upgrade the pack, then it is working fine.
Reference Link:
http://forum.virtuemart.net/index.php?topic=119484.0

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