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Editorial Team
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Asked: 2026-05-27T12:01:06+00:00

I have been trying to compress and store a json encoded string into mysql,

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I have been trying to compress and store a json encoded string into mysql, but I am getting “unexpected /” errors.

I also tried to use addslashes like this:

addslashes(gzcompress(json_encode($mystring)));

And to display

json_decode(gzuncompress(stripslashes($mystring)));

But it fails on insert with the error I mentioned.

I read somewhere a string with gzcompress should be stored as a blob, but I was hoping there is a way to store it in a mysql text field so I dont have to mess with the db.

PS: Some asked for full error message here it is:

Warning: Unexpected character in input: ‘\’ (ASCII=92) state=1

PDOException: SQLSTATE[HY000]: General error: 1366 Incorrect string
value: ‘\x9C\xED}\x8Br\xDB…’ for column ‘field_text_value’ at
row 1.

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1 Answer

  1. Editorial Team

    Store it as a BLOB. Even if there were a way to store it in a VARCHAR or *TEXT field in a way that survives a round trip, it would be a horrible way.

    Are you sure you need compression anyway?

    You can also make MYSQL do the compression, e.g. INSERT INTO mytable (compressed_json) VALUE (COMPRESS('[\"the json\"]').

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