Re: delete line
| From: | Chris Boget | Date: | Tue, 12 Aug 2003 15:54:55 +0000 |
| Subject: | Re: delete line | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-159290@lists.php.net to get a copy of this message | ||
> I've been looking and haven't found anything on this. How do you open a file
> then select a line and delete that line?
Warning: untested. This is just to give you a general idea.
$fileName = "blah.txt";
$lineToDelete = "Delete this line";
$fileArray = file( $fileName );
if(( $lineNum = array_search( $lineToDelete, $fileArray )) && ( $lineNum > 0 )) {
$firstPartArray = array_slice( $fileArray, 0, $lineNum );
$secondPartArray = array_slice( $fileArray, $lineNum + 1 );
$fileArray = array_merge( $firstPartArray, $secondPartArray );
$fp = fopen( $fileName, w+ );
fwrite( $fp, implode( '\n', $fileArray ));
}
I'm not too sure if the array_merge() is going to work. I am not sure if
the array_slice() maintains the current key in the new array. If it doesn't,
then you'll end up with jumbled file contents. If this is the case, then
you'll just need to iterate through both new arrays in turn and store the
values in a new array.
$newFileArray = array();
foreach( $firstPartArray as $value ) {
$fileArray[] = $value;
}
foreach( $secondPartArray as $value ) {
$fileArray[] = $value;
}
There might be a better way to do this, but that's the only way that I can
think of personally.
Chris