unlink() issues?

[Anon]

Hello all,

I am unable to delete a line for a file, even with permissions set to 777. Heres the code:

$sidslist = file("sids.txt");
$curday=date("d");
$curhour=date("h");

for ($index=0; $index < count($sidslist); $index++) {
list($month,$day,$hour,$min,$sec)=split(":",$sidslist[$index]);
if ($day<$curday) {
unlink($sidslist[$index]);
} elseif ($day=$curday && ($curhour-$hour) >= 12) {
unlink($sidslist[$index]);
} else {
next;
}
}

The unlink is called in the appropriate lines within the file...but the deleting of the line doesn't occur.

Any suggestion on how to delete a line??

Thanks,

gary

[Anon]

🙂 You have unlink() confused with unset(). unlink() is for removing a file, not a variable.

http://www.php.net/manual/en/function.unset.php

Change the unlink()'s to unset(), and try it out.

[Anon]

Hi!

I guess just unsetting the line won't ever delete it. You need to read the entire file into the array and then unset necessary lines, and then write them to the file. Or do a concurrent read-write (you will need to create a temporary new file, and when the operation is finished, delete the original file and rename the temp file to the old name). To do it concurrently, try using stack approach - read line into a variable, if it satisfies the conditions, write to new file, else continue.

Best,
Stas