checking if file exists

Anon

hello.
i have a file: index.php
im having a parameter (if set) will load that pages content into index, otherwise it will load default.

example..
index.php?content=art.html
or
index.php?content=music.html
otherwise
index.php

so i use the isset() to see if content is set, and if not i load the default.

how can i check to see (after determining that isset($content) is true, to see if the file exists, so if it doesnt i can display a different page like a 404 error?

Anon

if(file_exists($content))

Anon

RTM-

http://www.php.net/manual/en/function.file-exists.php

Anon

You can use the Built-In PHP function file_exists() to check if a file exists:

http://www.php.net/manual/en/function.file-exists.php

if(file_exists($content)) {
echo "exists";
} else {
echo "404";
}

However, keep in mind that if a user modifies your URL to have a ../ or even folder names, they could hack into files that they should be viewing. I recommend using:

$content = str_replace("/","",$content);

so that people can not view any files in any folders other than the current folder.

You may also want to make sure that people don't including your index.php, that would be bad 🙂

Hope this helps,
-Josh B

Anon

don\'t know if i understand you, but i guess it\'s like this:

if ($content == music.html) {
echo \"Whatever\";
}
else {
echo \"Didn\'t find the file\";
}

but that\'s only if the user try to load index.php?content=a_file_you_dont_have.html

Anon

<?
if(isset($content) && file_exists($content))
{
echo("exists");
}
else
{
echo("404");
}
?>