If you want to find out how to block websites on the iPhone by using it, please follow the instructions you find below and try to put them into practice. I assure you that it is really easy to set up this type of restrictions. In addition, by enabling a special function, you can even restrict browsing to a restricted circle of websites selected by the user (i.e. yourself). Here's everything you need to know.
Before we see in detail how to block websites on the iPhone, you must make sure that your "melafonino" has iOS 7 installed in it. To do this, go to the phone Settings (pressing on the icon on the home screen) and select General > About from the menu that appears.
If the version field are written 7.xx, means your iPhone is already equipped with iOS 7. Otherwise, you must upgrade the Terminal following the directions that are in my guide on how to install iOS 7. It is a very simple procedure which does not involve the loss of any data or any app. However, keep in mind that iOS 7 cannot be installed on earlier iPhone models to iPhone 4.
Having iOS 7 installed on your device, you can block websites on the iPhone by going into Settings> General > Restrictions and pressing Enable Restrictions button. Next, type a four-digit PIN with which to protect the settings of iOS (so that they cannot be modified by unauthorized persons), scroll down and select WebSites.
Then put a check mark next to Limit content for adults (feature to block content unsuitable for children) and press the button Add a website ... . In the screen that opens, type the address of the site you want to block, pressing on Web sites (top left) and you're done.
Trying to open the site just stuck in Safari, this will be unattainable.. Unfortunately the limitation does not apply to any other browser installed on the iPhone (eg. Chrome), so I suggest you go back in the menu to set the restrictions, select applications and remove the check from 17 +. In this way, all 3rd party applications deemed not usable by minors, such as browsers, cannot be opened and the only usable browser is Safari.
ALSO READ: How to block websites on Android
You can also make sure that the iPhone block access to all websites except those included in a white list customization. All you need to do and to bring you into Settings> General> Restrictions and select Web Sites from the menu that appears.
In the screen that opens, put the check mark next to the item only specific websites and add the addresses of websites which allow viewing on iPhone by scrolling down the page and pressing the button Add a Website.