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Posted by Rik on 11/11/51 11:49
greatprovider wrote:
> the formulas are inputted into a database in the format:
> "Na**3C**6H**5O**7*2H**20"
> i query the database and pass the list of unformated formulas through
> this function in a loop.
>
> function format_replace($formula) {
> $search = "/(\*{2}[\d]+)/";
> $replace = "<sub>\l</sub>";
> $formatted = preg_replace( $search, $replace, $formula);
> return $formatted;
> }
> the result i get for this is: Na\lC\lH\lO\l*2H\l (where "\l" is
> subscripted).
Euhm, I think i found the problem after numerous, all working, examples:
Use the NUMBER 1, it's hard in certain fonts to see the difference, but you
write 'l', not'1'.....
$search = '/\*{2}([\d]+)/';
$replace = '<sub>$1</sub>';
Using $N instead of \N is preferred.
Single quotes so PHP won't try to match a '$' to an existing variable.
Grtz,
--
Rik Wasmus
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