Deleting 1 line from a file

[Anon]

Dead easy, just cant figure it out how to maintain formatting. I have a txt file which looks like this:-

@domain.com [e-mail]
@domain2.com [e-mail]
@domain3.com [e-mail]

Say I want to delete the third line. How do I do it, wothout disturbing the layout of the file and without leaving gaps in the file. I first thought read it into a string and use str_replace \n. Cant do that cos getting it into a string loses all formatting when you write it back into a file. Im just confused. Any geniuses out there 🙂

[van__]

<?
// your file...
$filePath = 'path/to/file.txt';

//build an array of lines we'd like to exclude
$excludeLines = array('3','6','7');

//parse the file to an array ala perl
$fileLines - file($filePath);

//now loop for string output
for ($i=0;$i<count($fileLines);$i++) {
if (!in_array($i,$excludeLines)) {
//if we don't see this row as flagged, we append to a string.
$packLines .= $fileLines[$i];
}
}
//now write the string into the file... will overwrite last file contents.
$fp = fopen($filePath,'w');
fwrite($fp,$packLines);
fclose($fp);
?>

[[deleted]]

Tiny note: opening/read/overwriting a file is dangerous in a multi-user environment, sooner or later you'll get two scripts taht want to remove a few lines, and they will overwrite eachothers changes.

Use locking, or preferably a database instead of a file.

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[Anon]

Great thanks very much for the reply guys. But if I put each line into an array using file() whats stopping me looping through the whole array and using str_replace on each line looking for the txt needed to delete or replaced . For deleting just blank the array then loop the array into a second array not putting any empty array elements into the new array? I think my brain was switched off last night, thanks very much for your help.