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XAMPP: Couldn't start MySQL!

XAMPP: Couldn't start MySQL! Trying to run mysql on ubuntu 10.10 and give this vauge error "XAMPP: Couldn't start MySQL!" Try this 1. Open a terminal. 2. run this command sudo chown -hR root /opt/lampp 3. then run this sudo chmod -R 777 /opt/lampp 4. Now Restart XAMPP sudo /opt/lampp/lampp restart U are all set. And if u r getting the follwing warning after restarting "Warning: World-writable config file ‘/opt/lampp/etc/my.cnf’ is ignored" 1.Open terminal 2.Migrate to /opt/lampp/etc 3.run the command sudo chmod 755 my.cnf

Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included in the server configuration

To get rid off this error in linux; open terminal and type sudo a2enmod rewrite and enter ur password and ur done after that re-start ur apache using following command sudo /etc/init.d/apache2 restart

Difference between is_file and file_exists

If you want to know that the argument supplied is a file or not use is_file() file_exists() will take both file and directory as input and return true if they exists. So, unless you specifically want to check if the argument passed is a file use is_file otherwise use file_exists()

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XAMPP: Couldn't start MySQL!

Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included in the server configuration

Difference between is_file and file_exists