[H-GEN] REGEX pattern required

[Russell Stuart]

On Wed, 2004-12-08 at 15:40, Gary Curtis wrote:
> This would not be a problem so long as the digits are always
> in [say] the third element AND elements one and two, together,
> represent the section of the string to the left of the digits.

I have not tested any of this, and from experience
any non-trivial regex has bugs.  Its sort of a
corollary to "every non-trivial program has bugs".

That said a preg_match() should give you:

Input           $match[0]  $match[1]  $match[2]  $match[3]
--------------  ---------  ---------  ---------  ---------
"12"            "1"        ""         "12"       ""
"12aaa"         "12aaa"    ""         "12"       "aaa"
"aaa12"         "aaa12"    "aaa"      "12"       ""
"1aaa12"        "1aaa12"   "1aaa"     "12"       ""
"1aaa12xx"      "1aaa12xx" "1aaa"     "12"       "xx"