pattern not parsed and reports error

[jakubmisek]

the following pattern is correct, although it throws A subtraction must be the last element in a character class.

/^[ !#-[\]-~]*\z/

Example:

var_dump(preg_match('/^[ !#-[\]-~]*\z/', $subject));

[roberthusak]

I fixed it for certain cases, such as the one provided. However, to become fully compatible in this manner with PCRE, we'd need to remove character class subtraction, because it's allowed in .NET but not in PCRE. E.g. [a-z-[aeiuo]] has different meaning in each of them - while in .NET it matches b, in PCRE it matches -].

[jakubmisek]

thank you Robert!