file_exists()
| From: | Anthony Ritter | Date: | Wed, 26 Jun 2002 13:26:18 +0000 |
| Subject: | file_exists() | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-103941@lists.php.net to get a copy of this message | ||
I have a question about the PHP function file_exists():
This is taken from a textbook entitled "PHP Professional Projects" by
Wilfred, Gupta, Bhatnagar (Premier Press 2002 - ISBN1-931841-53-5) on page
261 under the chapter titled "Handling Files".
The authors write...
"Consider the following code to understand the file_exists() function.
<?
if (!(file_exists("data.dat")))
{
echo "The file exists";
}
else
{
echo "The file does not exist.";
}
"In the above code, the existence of the file data.dat is being verified
with the help of the statement if (file_exists("data.dat")).
[End of quote]
.............................
What I don't understand is why the author(s) have put the negation symbol of
!
in the preceding code.
It would seem to follow that in plain English that the above code statement
would read as...
If the file data.dat does *not* exist - then execute the following
condition which will print to the browser:
"The File exists."
Huh?
Please advise.
Thank you.
Tony Ritter