Replacing specified line in file.

[wwfc_barmy_army]

Hello Guys.

 

I have this PHP code to get a line from a file that starts with the word 'Number'. There is only 1 line with this in:

while( ! feof($file))
{
    $line = fgets($file);
    if (preg_match("/^Number\b/", $line))
    {
        echo $line;
    }
}

 

How would I go about replacing just that line? Any suggestions?

 

Thanks.

[SaMike]

Try this:

$line = preg_replace("/^Number\b/", "Replace with this", $line);

[wwfc_barmy_army]

I didn't include the whole code and it may change your answer:

 

$file = fopen("myfile","r");
while( ! feof($file))
{
    $line = fgets($file);
    if (preg_match("/^Number\b/", $line))
    {
        echo $line;
    }
}
fclose($file);

 

If i'm not mistaken it's opening it with read access, so I don't think that would work.

 

Any other ideas?

 

Thanks.

[SaMike]

Oh, you should first open the file and read it's contents, then clear it, then change the line from variable you read the contents into and then write new edited content back.

I dont think its possible to edit single line from flatfile.

[litebearer]

Just a passing thought (PSUEDO code)...

 

$lines = file($file_name);
$rows = count($lines);
$needle = "Number";
$new_content = "Whatever";
$i = 0;
while($i<$rows) {
if $needle in $line[$i];
   $line[$i] = $new_content;
$i = $rows;
}
$i ++;
}
write the $lines array back to a file

 

make sense?