$re = '/[\w\s]+[\w\(\):]+[\w\(\)<\-\s{=;+*%\.}]+/';
$str = 'def g(n:Int) = {
var vec = Vector.fill(0)(Vector.fill(0)(1))
for (p <- 1 to n) {
var vec2 = Vector.fill(0)(1)
for (q <- (p-1)*n+1 to p*n) {
vec2 = vec2 ++ Vector(q)
}
if (p%2==1) vec = vec ++ Vector(vec2)
else vec = vec ++ Vector(vec2.reverse)
}
println(vec)
}';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($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