How to store JSON string in MySQL db

Question

I\'m storing JSON data in a MySQL table using the code below. It works fine if the JSON is short but breaks for longer text. The \"field_json\" is a LONGTEXT.

Answer 1

Use place holders otherwise you are susceptible to SQL injection: http://php.net/manual/en/mysqli.quickstart.prepared-statements.php

Otherwise, here's a quick fix: http://php.net/manual/en/function.mysql-real-escape-string.php

$sql = sprintf(
        "UPDATE mytable SET field_json = '%s' WHERE id = '%s'",
        mysql_real_escape_string($json_string),
        mysql_real_escape_string($userid)
);
$result = mysql_query($sql);

EDIT

Please use PDO ( http://www.php.net/manual/en/book.pdo.php ). The mysql extension has been deprecated as of 5.5