Use serialize() to serialize the data and insert it into the database, and then use unserialize() to deserialize it and encounter some data string errors;
The error content is:unserialize() [function.unserialize ]: Error at offset 0 of 2544 bytes

I searched many solutions on Google and they all said that the problem was caused by encoding problems
So the place where I inserted it was changed to base64_encode(serialize($str));
The place where I read it was changed to
unserialize(preg_replace('!s:(d+):"(.*?)";!se', '"s:".strlen("$2").":"$2";"', $string))

I tried it and it worked but it was not completely resolved. Later, the same error occurred in some datagrams. Looking at the background data, I found that the inserted content turned into something similar to the garbled code below

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Please help me find out the reason, preferably in more detail.