Re: preg_replace() in 4.0.4

Ah, there is a bug in PHP 4.0.4 :-) Upgrade to the latest CVS to fix this. Also, preg_quote() is a good way to escape any special characters in the replace array. Monte Daniel Baldoni wrote: > > G'day Monte (and list), > > My original query was: > >> With the upgrade to 4.0.4, preg_replace() now does substitutions for $n in > >> the replacement strings (I say strings, because it's the easiest way of > >> doing mass substitutions over an array). This has caused me severe grief > >> (as there doesn't appear to be any way to stop it). > >> > >> I have an application which reads in a PostScript template file and > >> replaces occurrences of '@' delimited strings with specific values > >> (basically, a "variable subsituter"). Some of the replacement strings may > >> contain dollar amounts and so a '$' may (or may not) be present. If a > >> '$' > >> is present in a string, it will be followed by a digit. When I call > >> preg_replace() in this application, all 3 arguments are arrays. > >> ...[text deleted]... > > To which Monte replied: > > escape the $ signs in the replace array first, so $1 becomes \$1, etc. > > The problem with that is that you then end up with a "\$1" literally in the > final array. That may be fine if you're just doing something purely within > PHP, but in this case the data is being written as part of a PostScript > output stream. > > The actual code is something along the lines of: > > $pat = array('@v1@', '@v2@', ... '@vn@'); // > Constant strings > $rplc = array($a, $b, $c, 1, 1, ..., $n); > $new = preg_replace ($orig, $rplc, $tmplt); > > If, for example, $b contains '$1,234.56' the replacement for '@v2@' becomes > ',234.56'. If the '$' is escaped, the replacement is literally > '\$1,234.56'. > To complicate things further, $b may not be a "dollar value", but text along > the lines of 'N/A'. > > In my case, I don't actually want to do regular-expression substitution but > straightforward text substitution. But, as the arguments are all arrays > (lots of "variables" to be replaced by "values" in a pre-processed > template), > I can't just use str_replace(). > > Any suggestions would be much appreciated. Thanks. > > -- > -------------------------------------------------------+--------------------- > Daniel Baldoni BAppSc, PGradDipCompSci | Technical Director > require 'std/disclaimer.pl' | LcdS Pty. Ltd. > -------------------------------------------------------+ 856B Canning Hwy > Phone/FAX: +61-8-9364-8171 | Applecross > Mobile: 041-888-9794 | WA 6153 > URL: http://www.lcds.com.au/ | > Australia > -------------------------------------------------------+--------------------- > "Any time there's something so ridiculous that no rational systems programmer > would even consider trying it, they send for me."; paraphrased from "King Of > The Murgos" by David Eddings. (I'm not good, just crazy) -- Monte Ohrt <monte@ispi.net> http://www.ispi.net/