String Replacement

[wil]

I have a file that I need to replace a string in but the string occurs more than once. I only want to replace the first occurance of the string. This is driving me crazy. I can only figure out how to change both not one. Here is an example of the file I am working with.

%
O0001
T21
S2000M3
G0X0Y0
M22 ( I want to replace this line)
M24 ( I want to replace this line)

Allot of other code lines

M22 ( I want to leave this alone)
M24 ( I want to leave this alone)
M30

If amyone can point me to a function to help out it would be appriciated.
Thanks in advance,
Wil

[diego25]

If you're using preg_replace, the 4th argument is limit, which allows you to specify the limit of replaces to do. In your case, it'd be 1.

http://www.php.net/manual/en/function.preg-replace.php

Diego

[wil]

Thanks! Diego. Works just like I needed.

Wil