$con=mysql_connect("localhost","root","root"); if(!$con){ die("数据库连接失败!"); } mysql_select_db("test",$con); $dbusername=null; $dbpassword=null; $result=mysql_query("select * from user where username='".$username."';"); while($row=mysql_fetch_array($result)){ $dbus...
mysqli_connect_error(); exit; }// Return name of current default databaseif ($result = mysqli_query($con, "SELECT DATABASE()")) { $row = mysqli_fetch_row($result); echo "Default database is " . $row[0]; mysqli_free_result($result);}// Change db to "test" dbmysqli_...
$sql= sprintf("select %s from %s", implode(",",$dbcolarray), DB_TABLENAME); $result= mysql_query($sql,$conn); while($row= mysql_fetch_array($result, MYSQL_ASSOC))//与$row=mysql_fetch_assoc($result)等价 $tpl_db_rows[] =$row; mysql_free_result($result); mysql_close($conn);...
$sql ="SELECT id, firstname, lastname FROM MyGuests"; $result = mysqli_query($conn, $sql); if(mysqli_num_rows($result) >0) { // output data of each row while($row = mysqli_fetch_assoc($result)) { echo"id: ". $row["id"]." - Name: ". $row["firstname"]." ". $ro...
//写SQL语句 $sql = "select * from student"; //检测连接数据库是否成功,失败返回“连接失败”,并退出程序 if(mysqli_connect_error()){ die("连接失败"); } //执行SQL语句,返回结果集对象 $result = $db->query($sql); var_dump($result->num_rows); //判断结果有无数据 if($result->num_row...
} catch (PDOException $exception2) { // Display errors echo "<h1>Caught PDO exception:</h1>"; echo $exception2->getMessage().PHP_EOL; } unset($stmt); unset($conn); ?> ref https://www.w3schools.com/php/php_mysql_select.asp
问如何使用PHP从mysql中动态选择表EN我创建了一个html，它有一个公式表，可以让您在四个不同的选项...
$result = mysql_query($sql); while($row=mysql_fetch_array($result)) { echo "<p>".$row['book_name']."</p>"; } We run a MySQL query to select all the books start with the letter supplied by user and prepare the data returned to be displayed. ...
column that contains a serialization of a Money object representing 9.99 USD: 1 mysql> select * from products 2 *** 1. row *** 3 id: 1 4 name: Domain-Driven Designin PHP 5 price: O:22:"Ddd\Domain\Model\Money":2:{s:30:" Ddd\Domain\Model\Money amount";i:999;\ 6 s:32:...
php$sql="select * from dingdan where id=".$id;$query=mysql_query($sql);$rowscount=mysql_num_rows($query);if($rowscount>0){?><form id="form1" name="form1" method="post" action=""><table width="100%" border="1" align="center" cellpadding="3" cellspacing="1" bordercolor="#...