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$name='';//¼Ç¼ÄãµÄ»ñµÃµÄµÇ¼Óû§Ãû
$password='';//¼Ç¼Äã»ñµÃµÄµÇ¼ÃÜÂë
$sql="select * from Êý¾Ý¿â±í where Õ˺Å='$name' and ÃÜÂë='$password'";
$rt=mysql_query($sql);
if(mysql_num_rows($rt)!=0){
    echo "µÇ½³É¹¦";
    ......
}else{
    echo "µÇ½ʧ°Ü";
    ......
}

$name='';//¼Ç¼ÄãµÄ»ñµÃµÄµÇ¼Óû§Ãû
$password='';//¼Ç¼Äã»ñµÃµÄµÇ¼ÃÜÂë
$db=mysql_query('127.0.0.1£º3306','Óû§Ãû','ÃÜÂë');
if($db){
mysql_query('use Êý¾Ý¿âÃû');
mysql_query('set names utf8');
$sql="select * from Êý¾Ý¿â±í where Õ˺Å='$name' and ÃÜÂë='$password'";
$rt=mysql_query($sql);
if(mysql_num_rows($rt)!=0){
    echo "µÇ½³É¹¦";
    ......
}else{
    echo "µÇ½ʧ°Ü";
    ......
}
}else{$error=mysql_error();
echo $error;}

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