将注释的多行（自由空间）正则表达式传递给preg_match

Question

I have a regex that is going to end up being a bit long and it'd make it much easier to read to have it across multiple lines.

I tried this but it just barfs.

preg_match(
    '^J[0-9]{7}:\s+
    (.*?)             #Extract the Transaction Start Date msg
    \s+J[0-9]{7}:\s+Project\sname:\s+
    (.*?)             #Extract the Project Name
    \s+J[0-9]{7}:\s+Job\sname:\s+
    (.*?)             #Extract the Job Name
    \s+J[0-9]{7}:\s+',
    $this->getResultVar('FullMessage'),
    $atmp
);

Is there are way to pass a regex in the above form to preg_match?

Answer 1

You can use the extended syntax:

preg_match("/
    test
/x", $foo, $bar);