Re: using eregi_replace to replace only substrings -- not the entire string.

On Tue, 14 Aug 2001 12:23, Kurt Lieber wrote: > I'm trying to update a number in a text file using eregi_replace. > > The original line is: > > $registrationLimit = 100; > > and I'd like to change it to: > > $registrationLimit = 300; > > now, 100 appears multiple times throughout the file, so I have to match > on the whole string, not just 100. I used the following code: (this > may wrap in your mail client) > > $contents = eregi_replace("registrationLimit = > ([0-9]+);","registrationLimit = " . $form_registrationLimit . > ";",$contents); > > which works, but I'd like to find a more elegant way to do this, rather > than rebuilding the entire string. I tried: > > $contents = eregi_replace("registrationLimit = > ([0-9]+);",\\1$form_registrationLimit,$contents); > > but that only produces: > > $100300 > > (in other words, it combines the two values and strips out the > "registrationLimit = " part...) After reading the manual, I understand > why, but I'm hoping there's some similar such method where I can > parenthesize a substring in the string pattern and then replace only > that substring with my replacement string. > > Any thoughts? > > --kurt That sounds like a task for str_replace() -- David Robley Techno-JoaT, Web Maintainer, Mail List Admin, etc CENTRE FOR INJURY STUDIES Flinders University, SOUTH AUSTRALIA Windows is the best GUI - It always sticks!