[SOLVED] Delete entire line in text file if anything in the line matches search string

[speaker219]

Hello, how would I code a php script that would open a text file, look for a string i specified, and if it finds that string, it will delete the entire line in the text file that contained that text. I'm new to php, so sorry if this is really obvious.. :-\

Any help would be appreciated.

[Yesideez]

<?php
  if ($file=file("file.txt")) {
    foreach ($file as $txt) {
      if (stripos("search",$txt)!==false) {
        echo 'Found: '.$txt.'<br />';
      }
    }
  } else {
    echo 'Cannot read the file';
  }
?>

 

"string" is what you're wanting to look for - replace this with a variable containing the search text.

[aim25]

First use file_get_contents() to get the stuff in the txt file, then use str_replace() to chage a part of it.

[metrostars]

<?php
$content = file_get_contents("filename.txt");
$newcontent = str_replace("The string you want to find", "", "$content");
file_put_contents("filename.txt", "$newcontent");
?>

 

should do the trick.

[trq]

Another easy method if your using Linux is to use the Linux util sed.....

 

<?php

  exec("sed -i -e '/texthere/d' filehere");

?>

[speaker219]

I'm not sure you guys understand. I want it to delete the entire line after finding a specific string on that line. for example if the text file was:

Hello. this is line 1.
hello this is line 2
hello waka line 3
hello this is line 4

The key word is "waka" and I want the php script to delete the entire line of text that is on the same line as the word "waka" so it would look like this:

Hello. this is line 1.
hello this is line 2
hello this is line 4

thanks.

 

[aim25]

use this then.

<?php

$key = "waka";

//load file into $fc array

$fc=file("some.txt");

//open same file and use "w" to clear file

$f=fopen("some.txt","w");

//loop through array using foreach

foreach($fc as $line)
{
      if (!strstr($line,$key)) //look for $key in each line
            fputs($f,$line); //place $line back in file
}
fclose($f);

?>

[speaker219]

Thanks alot, worked nicely. Great forum here too

it's set up here: http://speaker219.ath.cx:8080/test.php

and the text file is : http://speaker219.ath.cx:8080/test.txt