Reading Backwards From a Text File

[Anon]

Hi there,

I have a text file that I need to read backwards from, and then print to the screen. This is for a news page, and as-is, new items are added to the bottom. This is bad. I tried several ways of adding new items to the top of the file, but that just wasn't working out. Reading backwards is, as far as I can tell, the way to go. But I'm not really sure where to start; the array_reverse docs sure weren't written with delimited text files in mind, as far as I can tell. My setup is like so:

item1:item2:item3
item1:item2:item3
item1:item2:item3
item1:item2:item3
item1:item2:item3
item1:item2:item3

If you could just outright tell me how to read from that file in reverse and then print it (in that order), I'd be ecstatic.

[Anon]

ok

first i don't think that's possible without a few steps in php.

first you need to read the code and create an array.

then you break the array into how many parts you need. In your case, three.

$array1 = "$item1";
$array2 = "$item2";
$array3 = "$item3";

then you just create another array in reverse.

$new_array = ("$array1","$array2","$array3");

kinda simple i guess

[Anon]

Another possible solution would be.

1. Copy your_file.txt to temp_file.txt
2. Delete your_file.txt
3. Create your_file.txt
4. Add the new record to your_file.txt
5. Read each record from temp_file.txt and write them into your_file.txt as you go.

-- OR --

You could write a simple database class of some sort and load your data into arrays so you could sort, add, delete, edit, etc.

-- OR --

You could use MySQL. (or any other rdbms) with the functionality you need.

[Anon]

Easy. (When do we get something like a <pre> tag in this editor?)

<?
$filename="some_file_name";
$body=file($filename);
for ($i=count($body);$i>0;--$i);{
funtion_to_display_line($body[$i]);
}
?>

[Anon]

$file = file("./listings.txt");
$count = (count($file) - 2);
//$i = $count;
for ($i=$count;$i >= 0; $i--) {
//if you want explode the contents of the line use:
//$line = explode(":", $file[$i]);
for $j=0;$j<count($line);$j++) {
print $line[$j];
}
//Or else just use
print $file[$i]."<br>";
}

[Anon]

Easy.
...
for ($i=count($body);$i>0;--$i);{

But not trivally easy: First there's an unwanted semicolon after the
closing paren, but that's just a typo. More serious is the fact that
the index will be off by one. You really need to say:

for ( $i = count($body) - 1; $i >=  0; --$i)
   {
   ....