Re: pcre.pattern.syntax.php (double-backslash in regex)

* Thus wrote Eli Gordon (egordon@itmeta.com): > > According to this doc: > : if you want to match a backslash, you write "\\". > > This does not seem to be the case. In fact, you need three backslashes > ("\\\"), not just two. > The context that the statement is used is describing syntax for PCRE usage not php. > For example, let's say we want to replace all instances of "\b" in the > string "foo \b" with the word "bar": > > preg_replace('/\\b/', 'bar', 'foo \b'); > returns: "barfoobar \barbbar" php passes '\b' to pcre, which treats that as a word boundry. the 'foo \b' is untouched. > > preg_replace('/\\\b/', 'bar', 'foo \b'); > returns what we expect: "foo bar" php passes '\\b' to pcre, and does what is defined in the section you pointed out. 'foo \b' remains untouched. Curt -- "I used to think I was indecisive, but now I'm not so sure."