replace file line

[cmancre]

Hello
Any one knows how to replace a line in a file at the exact handler position.

exemple file:

hello
handler -> hello hello
hello
-------------------
replacing with guys will result:
hello
guys
hello
----------------
and not this
hello
guys hello
hello
------------------
thanks

 

[duncdude]

/^.*$/guys/;

? (i am a Perl programmer - but i imagined this would be very similar)


Kind Regards
Duncan

 

[btaber]

how are you doing it now? (code)

 

[cmancre]

im not doin it no code

 

[sleepingkirby]

http://us2.php.net/manual/en/function.preg-match.php:

/*------------------------------------------------*/
preg_match

(PHP 3 >= 3.0.9, PHP 4, PHP 5)
preg_match -- Perform a regular expression match
Description
int preg_match ( string pattern, string subject [, array &matches [, int flags [, int offset]]] )

Searches subject for a match to the regular expression given in pattern.
/*------------------------------------------------*/

There are a lot of C was of doing what you want. But you know what? Use duncdude's perl regular expression. It's just easier.

 

[cmancre]

I did not get it wath to do with that? that's pattern matching. thanks

 

[btaber]

I have found the easiest way to work with a file is to read it into an array, do what needs to be done, then write it again. I suppose if it was a large file you could open two streams, reading the file then writing a temp file, read each line and write each line one at a time and modify the line you are looking for..