security implications of 'allow url fopen = On'

[edzillion]

Had to edit my php.ini to
'allow_url_fopen = On'
After searching around I gather there are some security issues that could arise from allowing this.
What are they?
What steps should I take?
Thanks
Ed

[eelixduppy]

It's just that it allows outside sources to be used in your programs. Not a big problem assuming your coding methods and practices are secure. This vulnerability comes from bad design and programming, not from the language itself.