removing from file

The code below adds text to the file in the format of:

www.my-site.com/filename.php?data=hello

PHP Code:

---

<?php
$filename = 'test.txt';
$somecontent = $_GET['data'] . "\n"; 

if (is_writable($filename)) {

   if (!$handle = fopen($filename, 'a')) {
         echo "Cannot open file ($filename)";
         exit;
   }

   if (fwrite($handle, $somecontent) === FALSE) {
       echo "Cannot write to file ($filename)";
       exit;
   }
   
   echo "Success, wrote ($somecontent) to file ($filename)";
   
   fclose($handle);

} else {
   echo "The file $filename is not writable";
}
?>

---

but then how can i make a php file which will allow me to remove the word 'hello' from test.txt

www.my-site.com/remove.php?data=hello
any help on this please?

Please don't post duplicates in more than one forum. I've deleted the thread you posted in General PC.

The easiest way to remove your stirng is to load the file into a string and use the str_replace() function:

PHP Code:

---

$file = file_get_contents($filename);

$file = str_replace("$somecontent\n", '', $file);

file_put_contents($file); 


---

thanks i used

PHP Code:

---

<?php
$filename = 'test.txt';
$somecontent = $_GET['data'] . "\n"; 

$file = file_get_contents($filename); 

$file = str_replace("$somecontent\n", '', $file); 

file_put_contents($file);
?>

---

but its now removing the word 'hello' from the test.txt

im doing

www.my-site.com/remove.php?data=hello

which should remove that line, any ideas where im going wrong? :confused:

error is:

Fatal error: Call to undefined function: file_put_contents() in /home/pouncer/public_html/remove.php on line 8