How to distinguish between a file of 0 bytes and FALSE?

[John Bokma]

I want to use file_get_conten ts, which according to the documentation
returns FALSE if it fails. However, it also fails if I read a file of 0
bytes in size.

So I tried to use filesize to check first. Same problem, I seem not to be
able to distinguish between a filesize of 0 bytes and FALSE.

What am I doing wrong?

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[Ewoud Dronkert]

On 2 Mar 2005 16:18:02 GMT, John Bokma wrote:

I want to use file_get_conten ts, which according to the documentation
returns FALSE if it fails. However, it also fails if I read a file of 0
bytes in size.

Either use file_exists() first, or test for identity: '=== FALSE'.
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[Chung Leong]

"John Bokma" <po********@cas tleamber.com> wrote in message
news:Xn******** *************** **@130.133.1.4. ..

I want to use file_get_conten ts, which according to the documentation
returns FALSE if it fails. However, it also fails if I read a file of 0
bytes in size.

So I tried to use filesize to check first. Same problem, I seem not to be
able to distinguish between a filesize of 0 bytes and FALSE.

What am I doing wrong?

file_get_conten ts() returns a empty string when the file is empty. PHP's
will implicitly convert that to false in a boolean context. The solution is
to use the === operator.

$data = file_get_conten ts($filename);
if($data === false) {
echo "Failed";
}

[FarazAli]

OR you can do

( ( $size = filesize($filen ame) ) !== FALSE && $size == 0 )

to check for a file with no contents (I think :D)

[John Bokma]

Ewoud Dronkert wrote:

On 2 Mar 2005 16:18:02 GMT, John Bokma wrote:

I want to use file_get_conten ts, which according to the documentation
returns FALSE if it fails. However, it also fails if I read a file of 0
bytes in size.

Either use file_exists() first, or test for identity: '=== FALSE'.

Used the latter, and it works, thanks :-D. (Forgot all about the === in
PHP)

--
John MexIT: http://johnbokma.com/mexit/
personal page: http://johnbokma.com/
Experienced programmer available: http://castleamber.com/
Happy Customers: http://castleamber.com/testimonials.html

[John Bokma]

Chung Leong wrote:

file_get_conten ts() returns a empty string when the file is empty.
PHP's will implicitly convert that to false in a boolean context. The
solution is to use the === operator.

Forgot all about that one, thanks for reminding me. I am too much used to
the Perl way of things :-D.

--
John MexIT: http://johnbokma.com/mexit/
personal page: http://johnbokma.com/
Experienced programmer available: http://castleamber.com/
Happy Customers: http://castleamber.com/testimonials.html