Logical operator AND with php regular expression

Question

I\'d like to use a kind of logical operator \"AND\" in my regular expression. I tried this:

(?=exp1)(?=exp2)

But in PHP ?= doesn\'

Answer 1

In addition to @Tim's answer:

(?=exp1)(?=exp2)

This can never be true. You say in plain english : make sure that the text followed here is exp1 and also make sure that the text followed here is exp2. No way this is true. It will never match.