Regular expression: Get TeX commands

Question

I have a string like:

$str = "\textaolig 3 \texthtbardotlessjvar  \textrthooklong
    B \textbenttailyogh ; \textinvomega q \textscaolig
    . \textbktailgamma p \textinvsca r \textscdelta
    D \textctinvglotstop ! \textinvscripta s \textscf
    2 \textctjvar I \textlfishhookrlig t \textsck";

And I wanna get all the TeX commands (\textaolig etc.) with a regular expression. I tried:

\\([[a-z]\s]+)

But with no luck. Can someone help me out?

Kind regards,

Answer 1

First of all, you have to enclose your string with single quotes because when using double quotes if you use a backslash it will try to escape a character, which isn't your case.

Secondly, you have to use \\\\ to match a backslash.

I don't know about TeX commands, but I've tried to match [\w\s\.;]+ so correct it if needed:

$str = '\textaolig 3 \texthtbardotlessjvar \textrthooklong
    B \textbenttailyogh ; \textinvomega q \textscaolig
    . \textbktailgamma p \textinvsca r \textscdelta
    D \textctinvglotstop ! \textinvscripta s \textscf
    2 \textctjvar I \textlfishhookrlig t \textsck';
    preg_match_all('/\\\\(?P<tex>\w+)/s', $str, $m);

    var_dump($m["tex"]);