Unserialize - Error at offset 9179 of 11507 bytes

Question

I am using php 7.1 and I want to unserialize the following value:

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However, I get the following error: Error at offset 9179 of 11507 bytes

The unserialize function returns false.

Any suggestions what is wrong with my string? I serialized the value beforehand, so I am not sure why there is an error in unserializing it.

I appreciate your replies!

Answer 1

This is probably an encoding issue. The issue starts with the string

s:137:"?A9 Hashrate is 50Ksol/s ...

When I copy the string it's only 135 bytes long, and it unserializes correctly with s:135:"...

You could correct those strings manually (there're only 4 of them in your example), or find out what charset you used for serialization and use the same for unserialization. I think the ? mark was a 3-byte character originally.

This issue came up in the past. For a semi automated solution you can try the regex in this answer. But that regex will choke when you have double quotes followed by semi-colons in your serialized strings.