Description:
------------
A serializing string "foo" produces an intuitive result 's:3:"foo"' and unserialize() properly decodes that back.

It would be useful, however, if the unserialize function could handle (even if less efficiently) cases, where the string-length is missing or even specified incorrectly. Currently any such mismatches result in empty output from the function, even though `s:"foo"' or `s::"foo"' or even `s:4:"foo"' is no harder to understand.

The feature would be of help to those of us, who need to a massive search/replace in the dump of serialized objects.

Test script:
---------------
<?
$s1 = "s:7:\"1234567\"";
$s2 = "s:6:\"1234567\"";
$s3 = "s:8:\"1234567\"";
$s4 = "s::\"1234567\"";

print "S1: >" . unserialize($s1) . "<\n";
print "S2: >" . unserialize($s2) . "<\n";
print "S3: >" . unserialize($s3) . "<\n";
print "S4: >" . unserialize($s4) . "<\n";
?>


Expected result:
----------------
S1: >1234567<
S2: >1234567<
S3: >1234567<
S4: >1234567<


Actual result:
--------------
S1: >1234567<
S2: ><
S3: ><
S4: ><