PHP - Delete Text From A Txt-file

Extremely new here and to PHP and I have exhausted my newbie resources and my brain on this one.   

Concept: Cron Job to INSERT 5 lines per hour (Not the whole list at once)
Script to read a pipe delimited text file (about 5k Lines) Open File Get last (bottom) 5 lines of file, ignore the rest Insert those 5 lines into my database Open File, Remove last (bottom) 5 lines
I am able to do parts 1-3 but not part 4 (removing last 5 lines) Please help me!

Code: [Select]
$data = array_slice(file('data.txt'), -5);
foreach($data as $value)
 {
  $fields=explode("|",$value);
  $num=count($fields);
  for ($n=0;$n<$num;$n++)
   {
    $null="";
    print ($n==0) ? "Importing Video...<BR>" : $null;
   }

// Insert into tmpvideos table here
include("includes/config.php");
            $last_id_result = @mysql_query( @"SELECT ext_id FROM tmpvideos ORDER BY ext_id+0 DESC, id DESC" );
            if ( 0 < @mysql_num_rows( $last_id_result ) )
            {
                $last_id = @mysql_result( $last_id_result, 0, "ext_id" ) + 1;
            }
            else
            {
                $last_id = "1";
            }


            copy($fields[3], "thumbs/ex_".$last_id.".jpg" );
            $fields[3] = "thumbs/ex_".$last_id.".jpg";

set_time_limit(0);
mysql_query("INSERT into tmpvideos (id, ext_id, title, description, duration, category, date_added, thumb, video, views, rating, votes, status)
VALUES ('','".$last_id."','$fields[0]','$fields[1]','$fields[5]','$fields[6]',NOW(),'$fields[3]','$fields[2]','','','','1')");

 }

I understand the 'concept' but am unable to grasp the code! I have tried many snippets and really need help.

I want to add text to a file, getting it printed out in index.php and later want to edit/delete per row. I give codes page wise. first the form to take data:
add.php:
Code: [Select]
<?php
?>
<form method="post" action="add_data.php">
<fieldset>
<legend>Student List</legend>
Name : <input type="text" name="uname" /><br>
Content : <input type="text" name="age" />
<br>
<input type="submit" name="submit" value="send" />
</fieldset>
</form>
Next adding text to a file: add_data.php:
Code: [Select]
<?php
$id = 1;
if (file_exists("data.txt"))
{
$fp = fopen("data.txt", 'r');
$str = fread($fp, filesize("data.txt"));
$str_arr = explode("|", $str);
foreach ($str_arr as $rec)
{
if ($rec)
{
$id++;
}
}
}

$mode = (file_exists("data.txt"))? "a" : "w";

$fp = fopen("data.txt", $mode);
$line = $id . "--" . $_POST['uname'] . "--" . $_POST['age'] . "|";
$res = fwrite($fp, $line);
fclose($fp);

header("location:index.php");


?>In the index.php, I'd like to fetch data and edit them per row:
Code: [Select]
<?php
$fp = fopen("data.txt", 'r');
$str = fread($fp, filesize("data.txt"));
$str_arr = explode("|", $str);
echo "<table border='1'>";
echo "<tr><td>ID</td><td>Name</td><td>Age</td><td>Option</td></tr>";

foreach ($str_arr as $rec)
{
if ($rec)
{
$rec_arr = explode("--", $rec);
echo "<tr>";
foreach ($rec_arr as $col)
{
echo "<td>$col</td>";
}
print "<td><a href=\"edit.php?id=$id\">Edit</a>/<a href=\"delete.php?id=$id\">Delete</a></td></tr>";
}
}
echo "</table>";

echo "<a href=\"add.php\">Add Data</a>";

?>


Next I want to Edit per row: edit.php:
Code: [Select]
<?php

$fp = fopen("data.txt", 'r');
$str = fread($fp, filesize("data.txt"));
$str_arr = explode("|", $str);

foreach ($str_arr as $rec)
{
if ($rec)
{
$rec_arr = explode("--", $rec);
$id = $rec_arr[0];
$name = $rec_arr[1];
$age = $rec_arr[2];
if ($id == $_REQUEST["id"])
{
echo "<form action='edit_data.php' method='post'>";
echo "Name :<input type='text' name='uname' value='$name' /><br>";
echo "Age: <input type='text' name='age' value=$age /><br>";
echo "<input type='hidden' name='uid' value=$id />";
echo "<input type='submit' value='Edit'>";
echo "</form>";
}
}
}


?>
From edit.php to edit_data.php where I practically try to edit per row:
Code: [Select]
<?php

$fp = fopen("data.txt", 'r');
$str = fread($fp, filesize("data.txt"));
$str_arr = explode("|", $str);

foreach ($str_arr as $rec)
{
if ($rec)
{
$rec_arr = explode("--", $rec);
$id = $rec_arr[0];
$name = $rec_arr[1];
$age = $rec_arr[2];

if ($id == $_POST['uid'])
{
$new_str = $id . "--" . $_POST['uname'] . "--" . $_POST['age'] . "|";
}
else 
{
$new_str = $id . "--" . $name . "--" . $age . "|"; 
}
}
}

fclose($fp);

$fp = fopen("data.txt", 'w');
fwrite($fp, $new_str);
fclose($fp);


?>
The mechanism is simple. Taking datas from a form, explode them to an array and get them into col/row pattern to edit and delete them. But my problem is when I want to edit in index.php page, specially in this part:
Code: [Select]
print "<td><a href=\"edit.php?id=$id\">Edit</a>
It says, undefined index. But I try to catch this $id in the edit.php page, in this manner, as you see in my code:
Code: [Select]
foreach ($str_arr as $rec)
{
if ($rec)
{
$rec_arr = explode("--", $rec);
$id = $rec_arr[0];
$name = $rec_arr[1];
$age = $rec_arr[2];
if ($id == $_REQUEST["id"])
{
echo "<form action='edit_data.php' method='post'>";
echo "Name :<input type='text' name='uname' value='$name' /><br>";
echo "Age: <input type='text' name='age' value=$age /><br>";
echo "<input type='hidden' name='uid' value=$id />";
echo "<input type='submit' value='Edit'>";
echo "</form>";
}
}
}
Have I done any mistake here? If anyone points out, I'll be obliged.

Hi,

I have built a captcha system that saves the captcha to a temp folder with the file name captcha_CURRENT_TIME_STAMP where CURRENT_TIME_STAMP is the unix time.

I want to delete images older than 5mins old by reading the time stamp on the file name. My question is this:

How can i loop through the image folder and read the time stamps on the file name and delete all images older than 5mins?

Thanks

Hey guys!
Everytime i upload something to the server theres a files created called Resource id #10 (number increments after eachj upload)
From what i can ubserve, those are the TMP file ... but for somereason it's staying there and piles up and takes out a lot of space.

Is there a way to delete them when the upload is finished?

i want to delete a file from FOXML directory. I had tried this code but no use...

<?php
$path="/srv/fedora/tomcat/webapps/formConfirm_1/WEB-INF/classes/FOXML";
$dh = opendir($path);
while ($temp = readdir($dh)) {
if ($temp!='.' && $temp!='..' && $temp!='.htaccess') chmod($temp,777); }


$filename = "/srv/fedora/tomcat/webapps/formConfirm_1/WEB-INF/classes/FOXML/myfile.xml";
unlink($filename);
?>

any suggestions??