I need to log flash messages from craft.session.getFlashes to a error log file from a particular twig template in Craft 2. Is there a way to do it ?

  1. Create a plugin (https://docs.craftcms.com/v2/plugins/introduction.html, https://pluginfactory.io/)
  2. Create a Variable class with a log function (https://docs.craftcms.com/v2/plugins/variables.html)
  3. Pass data from getFlashes to your function from within the template like e.g. craft.yourPluginName.yourVariableFunctionName(craft.session.getFlashes)

Tip: Use YourPluginName::log('blabla' . $string); to log anything to /storage/runtime/logs/yourpluginname.log from within your Plugin

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