Why do the inserted values ​​need to be concatenated?
NO1
NO1 2018-10-07 15:55:54
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values('" . $username . "','" . $password . "','" . $time . "','" . $ip . "')";

values ("$username","$password","$time","$ip")Isn't this possible?

NO1
NO1

reply all(1)
Don't cry

Because you need to correspond to the data type of each field in the database, if the string is not enclosed in quotation marks, an error will be reported

  • reply I know, but I don’t understand when using splicing.
    NO1 author 2018-10-09 14:32:06
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