The URL is not accessible when installing Magento

When installing Magento, we may get such error “The URL is not accessible”.

In some earlier versions of Magento, we can fix this problem by change code of app/code/core/Mage/Install/Model/Installer/Config.php
Just change

to

Will solve the problem.┬áIt’s because that the URL rewriting doesn’t work for some reasons. (Magento uses .htaccess files to add URL rewriting rules)

 

But in Magento 1.9, checking the “Skip the base url validation” option will solve this problem