str_replace

Leader_of_Men

Here's the code:
<?php
$file = file('../posts.php');
$display = $_POST['oldpost'];
$display2 = ("$display+1");

for($x=$display;$x<$display2;$x++) {
echo "$file[$x]";
$oldpost = "$file[$x]";
}

$fp = fopen("../posts.php", 'w+');
$new = str_replace("$oldpost","","$oldpost");
fwrite($fp, $new);
fclose($fp);

Now, I WANT it to delete the old post (which has it's ID sent from admin.php).

Example, if I wanted to delete the post on the first line of posts.php I would put 1. Why does this wipe out the entire posts.php file when I run it?

easethan

I'm kinda confused...con-fuss-ed...could you clarify a bit?

Weedpacket

Originally posted by Leader of Men
$new = str_replace("$oldpost","","$oldpost");
[/b]

So what this line does is that it takes the string in $oldpost, looks through it for occurrences of the string $oldpost (which is the entire string), and replaces each one with the empty string. Upshot: $new is the empty string. And that's what gets written out.

I don't understand what your code is doing well enough to offer a quick fix; but I can say it's a waste of time writing things like "$oldpost" instead of $oldpost; if the variable is being passed to a function that expects it to contain a string, it will be converted to a string automatically (if it isn't one already).

Leader_of_Men

I just want it to delete a certain line of ../posts.php.

The line # will be sent by post (oldpost) as a number.

Weedpacket

Originally posted by Leader of Men
I just want it to delete a certain line of ../posts.php.

The line # will be sent by post (oldpost) as a number.

If the line numbers start from 0, all you need to do is unset($file[$that_line_number]). If the line numbers start from 1 you'd of course need to subtract 1 first. Then write the $file array back out (either line by line in a loop, or by joining it together with "" into one big string and writing that).