A programmer reports this problem when using PHP: “It didn’t take me long to find out that if you use flat files to read and write, you should change their settings. They’re set to read, not write, so...

A programmer reports this problem when using PHP: “It didn’t take me

long to find out that if you use flat files to read and write, you should

change their settings. They’re set to read, not write, so just click Properties

to change their settings. To save time, if I saw an error I didn’t understand,

I Googled it.” What kind of error is it? What rules were applied, and

which should have been applied earlier?