选择*不会在php mysql中打印任何东西 - Select * wont print anything in php mysql

Select * wont print anything in php mysql

本文关键字：打印任何东 mysql php 选择 | 更新日期: 2023-09-26

我做了一个php脚本，如下所示，运行它，输出是Record Added to Table

<?PHP
$user_name = "root";
$password = "";
$database = "test_db";
$server = "127.0.0.1";
$db_handle = mysql_connect($server, $user_name, $password);
$db_found = mysql_select_db($database, $db_handle);
if ($db_found) {
$SQL = "INSERT INTO name (FirstName) VALUES ('bill')";
$result = mysql_query($SQL);
mysql_close($db_handle);
print "Records added to the database";
}
else {
print "Database NOT Found ";
mysql_close($db_handle);
}
?>

现在查看表的内容，我做了

<?PHP
$user_name = "root";
$password = "";
$database = "test_db";
$server = "127.0.0.1";
$db_handle = mysql_connect($server, $user_name, $password);
$db_found = mysql_select_db($database, $db_handle);
if ($db_found) {
$SQL = "Select * from name";
$result = mysql_query($SQL);
print "$result";
mysql_close($db_handle);
print "Records added to the database";
}
else {
print "Database NOT Found ";
mysql_close($db_handle);
}
?>

但是输出是资源id #3Records添加到数据库，而我想看到表的内容

mysql_query的返回值不能像你尝试的那样发送到输出。

mysql_query返回一个结果集，例如用于http://www.php.net/mysql_fetch_row。

的例子:

while($row=mysql_fetch_array($result)) {
    print_r($row);
}

$result包含mysql_query的返回值，该返回值为resource (http://php.net/manual/en/function.mysql-query.php)

使用mysql_fetch_assoc($result)或mysql_fetch_array($result)或…获取实际数据

while ($row = mysql_fetch_array($result, MYSQL_NUM)) {
    printf("Result: %s", $row[0]);  
}

mysql_query()将返回一个resultset对象，您必须在循环中读取该对象以获取其行:

while($row = mysql_fetch_array()) {
   echo htmlspecialchars($row['column1']);
}

如果要从数据库中进行选择，请尝试:

<?PHP
$user_name = "root";
$password = "";
$database = "test_db";
$server = "127.0.0.1";
$db_handle = mysql_connect($server, $user_name, $password);
$db_found = mysql_select_db($database, $db_handle);
if ($db_found) {
$SQL = "Select * from name";
$result = mysql_query($SQL);
 while ($row = mysql_fetch_array($result))
 {
  print $row[0]." Record is selected";
 }
mysql_close($db_handle);

}
else {
print "Database NOT Found ";
mysql_close($db_handle);
}
?>