can you explain what is happening here?
for example:
what is $f[2]'something else' ? is it another file?
and if I want to replace AppParam=this with AppParam=that what is it i use?
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Question
replacing strings while leaving others alone.
Im trying to fopen a file so that i can replace a line while leaving the other lines alone.
Example:
I want to fopen C:\test.txt which consists of:
Line1 = Ip address
Line2 = Port
Line3 = parameters
I want to be able to replace Line 3 with new parameters while leaving line 1 and line 2 alone. What do i use to do this?
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Answers
Basically you read the file into an array line-by-line, change the 3rd element of the array to what you want, turn this back into a string and write it back to the file.
I'll go through the code line by line here
//file reads the entire contents of the file into an array( see http://us3.php.net/file ) line by line, leaving the \n in place
$f=file('c:\test.txt');
//so now replace the third line with your new text
$f[2]='something else';
//now open the file, the w tells your it's for writing ( see http://us3.php.net/fopen )
$o=fopen('c:\test.txt', 'w');
//fwrite takes a string as an arg and writes it to the file ( http://www.php.net/fwrite )
//implode puts the elements of the given array into a string with the first argument seperating them
//( http://us2.php.net/implode
//note that since the \n is still there when you read the file into the array, so you don't need a seperator
fwrite($o, implode("", $f));
//close the file
fclose($o);
ok well the orginal test.txt looks like this:
Line1
AppParm=hello world
Line3
Line4
now im using yuor code:
<?
$f=file('/home/supervise/t
$f[1]='AppParm=this and that';
$o=fopen('/home/supervise/
fwrite($o, implode("", $f));
fclose($o);
?>
and it works almost perfectly. its cahning it to this:
Line1
AppParm=this and thatLine3
Line4
Notice that its not line breaking after line 2. What can I do so it changes it to:
Line1
AppParm=this and that
Line3
Line4
Thanks
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.
I will leave the following recommendation for this question in the Cleanup topic area:
Split: Arantius, Saifatlast, kl4518
Any objections should be posted here in the next 4 days. After that time, the question will be closed.
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by: arantiusPosted on 2005-10-16 at 12:06:52ID: 15095346
<?
$f=file('c:\test.txt');
$f[2]='something else';
$o=fopen('c:\test.txt', 'w');
fwrite($o, implode("\n", $f));
fclose($o);
?>