Re: how to delete lines in a txt file using php.

babu wrote:

Hi i have a txt file like [SUBSTRAT] TYP=25x25_10 SUBSTRATNAME=S112 PIXEL=5 OPERATOR=Zi KOMMENTAR=dunkel INTENSITAET=1000.000000 [MESSUNG] DATUM=03.01.2005 UHRZEIT=11:22 MESSUNG=SWEEP_UI i want to delete lines which start with '[' and 'TYP'. i have multiple such files.i have used strstr method. i have written code for it, but it results in deletion of complete data from files. Can anyone check where the logic goes wrong. here is my file. <? $del_lines=array("[","TYP","P_MPP","I_MPP","V_MPP","T=","FIT","INTENSITAET"); $dir=getcwd(); $handle = opendir($dir); while (false !== ($file = readdir($handle))) { if ((preg_match('/^2005\d{4}_\d{4}\.txt$/', $file))||(preg_match('/^2005\d{4}_\d{4}\_01_01\.txt$/',$file))){

     $fc=file($file);
     $f=fopen($file,"w");
     foreach($fc as $line){
      $bool=TRUE;
     for($i=0;$i<sizeof($del_lines);$i++){
          if(!strstr($line,$del_lines[$i])){
            $bool=FALSE;}
             break;
           //fputs($f,$line);
        }
    //if($bool){fputs($f,$line);}

} if($bool){fputs($f,$line);} fclose($f);

    } }

closedir($handle); ?> --------------------------------- Yahoo! Messenger NEW - crystal clear PC to PCcalling worldwide with voicemail

wouldn't something like this work (faster): <?php $deleteLines = array("[","TYP","P_MPP","I_MPP","V_MPP","T=","FIT","INTENSITAET"); if($handle = opendir('.')) { while(($file = readdir($handle)) !== false) { // init vars $contents = ''; if (!(preg_match('/^2005\d{4}_\d{4}\.txt$/', $file) || preg_match('/^2005\d{4}_\d{4}\_01_01\.txt$/',$file))){ // the filename has been rejected; move on to the next one continue; } // right, we need to open the file now so we can delete the lines $contents = file($file); $stream = fopen($file, 'w'); // loop trough the file, examining each line foreach($contents as $line=>data) { foreach($deleteLines as $delete) { if(0 !== strpos($data, $delete)) { // string does not start with one of the ToBeDeleted parts // this (combines strpos() !== false || strpos() > 0) // // so, let's write it back to the file fwrite($stream, $data, strlen($data)); } } } fclose($stream); } } closedir($handle); ?> I'm assuming here you want to only delete lines STARTING with the part given in the array. - tul