500 Internal Server Error Part 1

500 Internal Error Can be caused by many reasons some of which I am going to list here that might help you figure out your problem and remove your headache.
  • File Permissions
    • Some hosting providers like hostagator they need a specific permission set for the files and folders.  You can follow this rule for most of the hosting solutions. File permissions should be 644 and directory permissions should be 755.
  • .htaccess Rule error
    • use of php_flag in .htaccess file can result in 500 Internal Server Error, its a good practice to set values in php.ini rather than to use .htaccess for php configuration. php_flag can be used only with php_ini_all and php_ini_perdir directory types and is used to set boolean values only.
      You can check in apache error log too for this which might be logged as :
[Mon Nov 11 04:15:01 2013] [alert] [client 120.89.118.206] /public_html/.htaccess: Invalid command 'php_flag', perhaps misspelled or defined by a module not included in the server configuration


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