Reading, erasing string in a particular length.

[joshblue]

 

Hi, can someone please help me with this...

 

I need to read a textfile. This is the contents of the textfile, for example:

 

 
100005HELLO WORLD        L1
HELLO WORLD                  L2
100010THIS IS A SAMPLE  L1

 

I need a script that would erase the numbers between 1 and the text (ex 100005HELLO WORLD) in every line only if the line has a string of L1

 

What do you think?  ???

 

[rhodesa]

<?php
  $file = 'file.txt';
  $contents = file_get_contents($file);
  echo preg_replace('/(\s+1)\d+(.+?L1)/','$1$2',$text);
?>

[sasa]

try

<?php
$text = ' 
100005 HELLO WORLD        L1
100000HELLO WORLD                  L2
100010THIS IS A SAMPLE  L1';

echo preg_replace('/(?<=1)\d+(?=[a-z][^\n\r]*L1)/i','',$text);
?>