Two ways to connect MySQL with PHP and prevent garbled characters_PHP tutorial

MySQL configuration for PHP

Error message: Class 'mysqli' not found in

Answer:
1. In conf/php.ini, use "/php_mysql" in vim to search for extension=php_mysql.dll, and remove the previous ";",

Also add extension=php_mysqli.dll;

Note that the dll at the back has an extra i
2. "/extension_dir" check whether the path is correct;
3. Find the ext/ directory and copy the two files php_mysql.dll and php_mysqli.dll to %systemroot%/system32.
4. Restart the service

Connect to database
//In conf/php.ini, use "/php_mysql" in vim to search extension=php_mysql.dll, remove the ";" in front, and add extension=php_mysqli.dll;
$mysqli = new mysqli("127.0.0.1","Username", Password","Library Name");
$query="select * from table order by theindex desc";
$mysqli->query("SET NAMES gb2312");//Note that if you don’t add it here, the code will be garbled
$result = $mysqli->query($query);

//printf() function outputs a formatted string
while(list($name, $theindex) = $result->fetch_row())
echo("
".$name.$theindex);

$con = mysql_connect("localhost", "username", "password");
if ($con) {
mysql_query("set names 'gb2312'");
             mysql_select_db("Library Name", $con);//Note that if you don’t add it here, it will cause garbled characters
                                        $rs = mysql_query("select * from table order by theindex desc;", $con);
If ($rs) {
echo ("

");
                                                                                                                                                                                                                                                                                                                                                                                                            echo "" .
"" .
"" .
"";
                                                                 mysql_free_result($rs);
                                                                 echo ("

$row[theindex]

$row[name]

");
mysql_close($con);
}

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