String parsing: numeric cast comparison and quote delimiter check

[rafageist]

From PHPStan baseline: src/div.php lines 8444 and 8447.

Snippet:
`
if (is_numeric()) {
return ((float) === (int) ) ? (int) : (float) ;
}

if (preg_match('/^("|').*(\1)$/s', , ) && [1] === [2]) {
...
}
`

PHPStan reports strict float/int comparison always false and $m[1] === [2] always false (no capture group 2). Review numeric parsing and quote matching logic.