deleting a line

say i would like to delete the middle line of this txt, in member.txt
what php code or logic would help me accomplish this?

how do i delete from a text file 1 of the following lines:
>
>
jon|scott
adam|smith <--delete
paul|clark
>
say i would like to delete the middle line of this txt, in member.txt
what php code or logic would help me accomplish this?
>
Also i am clicking on a hyperlink that is keeping count of the entries
i have
made. e.g php?record_id =1
php?record_id =2
>

programming wrote:>>>>
Or, better yet, learn to use a SQL database.
>
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstuck...@attglobal.net
==================

programming wrote:>
For a small file:
>
1. Read member.txt into an array (the "file" function is
your friend);
2. Make the changes to the array (the "unset" function is
your friend);
3. Output the array to "member-new.txt";
4. Delete "member.txt";
5. Rename "member-new.txt" to "member.txt";
>
If the file is larger (more than say, 500 kB) this might become a bit
memory-hungry, and it's worth looking at iterating over each line of the
file individually rather than reading it all into memory at once.
>
--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~http://tobyinkster.co.uk/contact
Geek of ~ HTML/SQL/Perl/PHP/Python*/Apache/Linux
>
* = I'm getting there!

On Apr 11, 10:57 pm, Jerry Stuckle <jstuck...@attglobal.netwrote:>
yes, but this assignment i am doing does not require that...the next
one will be using SQL
>

programming wrote:>>>
Ah, getting help with your homework...
>
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstuck...@attglobal.net
==================

On Apr 11, 7:08 pm, Toby A Inkster <usenet200...@tobyinkster.co.uk>
wrote:>
Thanks for you steps, i had a go at doing it..is this what you meant
by any chance?
>
<?php
>
$line = file ("./member.txt", "w");
unset($line);
>
$line = fopen("./member-new.txt");
>
unlink("./member.txt")
>
rename("member-new.txt","member.txt");
>
fclose($line);
>
>
?>
>
I am getting a parse error, and i am not sure if i am doing this
right??
>
Parse error: syntax error, unexpected T_STRING in /volumes/data1/home/
pioannou/public_html/php/Assignment11/admin/delete_member.php on line
11

// 1. Join the array to a single string (newlines are already attached)
// 2. Write the updated array to the new file
fwrite($lines_update, join("", $lines);

// Remove the old file
unlink("./member.txt");
>
// Rename the new file to use the old filename, replacing the old file
rename("member-new.txt","member.txt");

programming wrote:>>>>>>>>>>>>>>
The parse error itself comes from the missing semicolon on the line
with the unlink() function.
>
Second, you have placed the "w" parameter on the wrong function (on the
file() function instead of the fopen() function).
>
Thirdly, you're attempting to move/rename the new file BEFORE closing
the file handle for it. This could cause problems in terms of
locking/permissions.
>
Fourthly, you still haven't output the updated array to the new file
yet. Also, you're unsetting (deleting) the entire array instead of just
a single item.
>
After fixing the errors, the final source code snippet should look
something like this (with comments attached):
>
<?php
>
// Which line number (counting from 0) should we delete?
$line_to_delete = 4;
>
// Load the lines into an array; newlines are still attached
$lines = file ("./member.txt");
>
// Delete the line number from the array
unset($lines[$line_to_delete]);
>
// Open the new file for writing
$lines_update = fopen("./member-new.txt", "w");
>
// 1. Join the array to a single string (newlines are already attached)
// 2. Write the updated array to the new file
fwrite($lines_update, join("", $lines);
>
// Close the file handle to allow other operations on the file
fclose($lines_update);
>
// Remove the old file
unlink("./member.txt");
>
// Rename the new file to use the old filename, replacing the old file
rename("member-new.txt","member.txt");
>
?>
>
--
Kim André Akerø
- kiman...@NOSPAMbetadome.com
(remove NOSPAM to contact me directly)

programming wrote:>>>>>>>>>>>>>>
The parse error itself comes from the missing semicolon on the line
with the unlink() function.
>
Second, you have placed the "w" parameter on the wrong function (on the
file() function instead of the fopen() function).
>
Thirdly, you're attempting to move/rename the new file BEFORE closing
the file handle for it. This could cause problems in terms of
locking/permissions.
>
Fourthly, you still haven't output the updated array to the new file
yet. Also, you're unsetting (deleting) the entire array instead of just
a single item.
>
After fixing the errors, the final source code snippet should look
something like this (with comments attached):
>
<?php
>
// Which line number (counting from 0) should we delete?
$line_to_delete = 4;
>
// Load the lines into an array; newlines are still attached
$lines = file ("./member.txt");
>
// Delete the line number from the array
unset($lines[$line_to_delete]);
>
// Open the new file for writing
$lines_update = fopen("./member-new.txt", "w");
>
// 1. Join the array to a single string (newlines are already attached)
// 2. Write the updated array to the new file
fwrite($lines_update, join("", $lines);
>
// Close the file handle to allow other operations on the file
fclose($lines_update);
>
// Remove the old file
unlink("./member.txt");
>
// Rename the new file to use the old filename, replacing the old file
rename("member-new.txt","member.txt");
>
?>
>
--
Kim André Akerø
- kiman...@NOSPAMbetadome.com
(remove NOSPAM to contact me directly)

this sounds good, but the only think i am confused about know is the
line_to_delete = 4;
is there any chance of matching the entry line from my web page to the
line
in the text file by using a superglobal to catch the value that needs
to be matched to the line in the file...

"programming" <periklis.ioan...@gmail.comschreef in berichtnews:1176327375.195579.189940@d57g2000hsg.g ooglegroups.com...
On Apr 11, 10:56 pm, Kim André Akerø <kiman...@NOSPAMbetadome.com>
wrote:
>
>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
$line_to_delete = 'this is my test line.';
>
/*
// instead of:
unset($lines[$line_to_delete]);
// use:
*/
>
// deletes every occurence of the line, case insensitive
foreach($lines as $key =$value)
{
if(strtolower($value) == strtolower($line_to_delete))
{
unset($lines[$key]);
}
>
}
>
// or, deletes first occurence of the line, case insensitive
$found = false;
while (!$found && list($key, $value) = each ($lines)) {
if(strtolower($value) == strtolower($line_to_delete))
{
unset($lines[$key]);
$found = true;
}
>
}

while(!$found && list($key, $value) = each($line)) {
if(strtolower($value) == strtolower($line_to_delete))
{
unset($line[$key]);
$found = true;
}
}