What to do if php cannot insert data

Solution to the problem that php cannot insert data: first check whether the sql statement can run normally in the Mysql command line; then use the "mysql_query" method to check the error message; and finally reset the encoding method.

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Solution to PHP connection to Mysql but unable to insert Data into the database

When writing a web page, under certain circumstances, mysql_connect may connect to the database, and mysql_select_db selects the correct table, but it cannot use mysql_query to insert data into the database. .

There are many situations when encountering this situation. First, you have to check whether your sql statement can run normally in the Mysql command line and whether it can complete the function. If it can run normally, it means that your sql statement is correct. Then use

  $res = mysql_query($sql, $con);
   if($res){
       echo "插入成功";
   }
    else{
     echo mysql_error();
    }

to solve the problem based on the error message. If mysql_error() cannot be displayed; it may be a coding error. Add mysql_query( "set names GBK"); add your own mysql encoding after the names.

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