OpenCart : Percentage in Special and Discount

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by alcher

The mod allows you to use absolute value or % for OpenCart Special Price & Discount

  1. Any number < 1 is considered as a discount in %%, for ex: 0.15 means 15% OFF retail price. The ‘On Sale’ price will be correlated with retail price.
  2. Special or Discount is greater or equal 1 will be processed as an absolute value.
  3. The mod will change the priority for Special и Discount. Discount will have higher priority than Special price.

(more…)

Override Engine and OpenCart 3.0.3.6+

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by alcher

Since OpenCart 3.0.3.6 (3.0.3.5 ??)  the Twig has been moved to another location, and OverrideEngine stopped working. Unfortunately, there is no newer version from the author.

So, find the code (line 792, version for OpenCart 3.0.3.3):

include_once(DIR_SYSTEM . 'library/template/Twig/Autoloader.php');
Twig_Autoloader::register();
$loader = new \Twig_Loader_Filesystem(DIR_TEMPLATE);		
$config = array('autoescape' => false, 'cache'=>false);

and replace with:

$loader = new \Twig\Loader\FilesystemLoader();
$loader->addPath(DIR_TEMPLATE);
$config = array( 'autoescape'  => false, 'cache'	=> false, 'debug' => false, 'auto_reload' => true );

OpenCart : PHP 8

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by alcher

Backward Incompatible Changes:

  • It’s very rare, but in some old extensions or packages, the array and string offset access syntax using curly braces could be found.  It’s deprecated in PHP 7.4 The easiest way to check is to run global search/replace: 
    (\$[A-z0-9_]* ?)\{([^}]+)\} with $1[$2]

    be careful, some JavaScript files could be modified too.

  • “The @ operator will no longer silence fatal errors … Error handlers that expect error_reporting to be 0 when @ is used, should be adjusted to use a mask check instead”. Replace in /system/framework.php (lines 19-21):
    if (error_reporting() === 0) {
  return false;
}
    with
    if (!(error_reporting() & $code)) {
  return false; // Silenced
}
  • Comment line 7 in Environment.php from Twig
    @trigger_error(sprintf('Using the "Twig_Environment" class is deprecated since Twig version 2.7, use "Twig\Environment" instead.'), E_USER_DEPRECATED);

    otherwise it will bloat the the OpenCart error file

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