$re = '/(?i)UPDATE[ \t\n]{1,}(fact)(.*)\n(from)?([ \t\n]{1,})?(.*)?\n*set[ \n\t]{1,}(coloana)[ \t\n]*=[ \t\n]*(ifnull\(\s*)*([\w\d]*)([\ ,\'\w\n\t)(\n=.]*);/';
$str = 'update fact,x2,asdasjsdjbmfeweoewo
from asdas,asaskdvd
set coloana = ifnull( ifnull( col2,\'Test\'), \'Test2\')
where c = c.s.
and asdsa = asda.asda;
UPdate fact,x2
set coloana = ifnull(col2,\'Test\')
where c = c.s.;
update
fact,x2
from
asdas
set coloana = ifnull(col2,\'Test\')
where c = c.s.
and asdsa = asda.asda;
update fact,x2
from asdas
set coloana = (select x from y where x.fg = x2.asfds)
where c = c.s.
and asdsa = asda.asda;';
preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php