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php - 如何通过php检查mysql表是否可访问

转载 作者:太空宇宙 更新时间:2023-11-03 10:45:03 24 4
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我有自托管网络应用程序,我正在尝试访问 information_schema 表,了解如何在某些服务器中禁用它。如何查看是否可以访问?

最佳答案

解决此问题的示例解决方案:

  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>MySQL Connection Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<style type="text/css">
#wrapper {
width: 600px;
margin: 20px auto 0;
font: 1.2em Verdana, Arial, sans-serif;
}
input {
font-size: 1em;
}
#submit {
padding: 4px 8px;
}
</style>
</head>

<body>

<div id="wrapper">

<?php
$action = htmlspecialchars($_GET['action'], ENT_QUOTES);
?>

<?php if (!$action) { ?>

<h1>MySQL connection test</h1>

<form action="<?php echo $_SERVER['PHP_SELF']; ?>?action=test" id="mail" method="post">

<table cellpadding="2">
<tr>
<td>Hostname</td>
<td><input type="text" name="hostname" id="hostname" value="" size="30" tabindex="1" /></td>
<td>(usually "localhost")</td>
</tr>
<tr>
<td>Username</td>
<td><input type="text" name="username" id="username" value="" size="30" tabindex="2" /></td>
<td></td>
</tr>
<tr>
<td>Password</td>
<td><input type="text" name="password" id="password" value="" size="30" tabindex="3" /></td>
<td></td>
</tr>
<tr>
<td>Database</td>
<td><input type="text" name="database" id="database" value="" size="30" tabindex="4" /></td>
<td>(optional)</td>
</tr>
<tr>
<td></td>
<td><input type="submit" id="submit" value="Test Connection" tabindex="5" /></td>
<td></td>
</tr>
</table>

</form>

<?php } ?>

<?php if ($action == "test") {

// The variables have not been adequately sanitized to protect against SQL Injection attacks: http://us3.php.net/mysql_real_escape_string

$hostname = trim($_POST['hostname']);
$username = trim($_POST['username']);
$password = trim($_POST['password']);
$database = trim($_POST['database']);

$link = mysql_connect("$hostname", "$username", "$password");
if (!$link) {
echo "<p>Could not connect to the server '" . $hostname . "'</p>\n";
echo mysql_error();
}else{
echo "<p>Successfully connected to the server '" . $hostname . "'</p>\n";
// printf("MySQL client info: %s\n", mysql_get_client_info());
// printf("MySQL host info: %s\n", mysql_get_host_info());
// printf("MySQL server version: %s\n", mysql_get_server_info());
// printf("MySQL protocol version: %s\n", mysql_get_proto_info());
}
if ($link && !$database) {
echo "<p>No database name was given. Available databases:</p>\n";
$db_list = mysql_list_dbs($link);
echo "<pre>\n";
while ($row = mysql_fetch_array($db_list)) {
echo $row['Database'] . "\n";
}
echo "</pre>\n";
}
if ($database) {
$dbcheck = mysql_select_db("$database");
if (!$dbcheck) {
echo mysql_error();
}else{
echo "<p>Successfully connected to the database '" . $database . "'</p>\n";
// Check tables
$sql = "SHOW TABLES FROM `$database`";
$result = mysql_query($sql);
if (mysql_num_rows($result) > 0) {
echo "<p>Available tables:</p>\n";
echo "<pre>\n";
while ($row = mysql_fetch_row($result)) {
echo "{$row[0]}\n";
}
echo "</pre>\n";
} else {
echo "<p>The database '" . $database . "' contains no tables.</p>\n";
echo mysql_error();
}
}
}
}
?>

</div><!-- end #wrapper -->
</body>
</html>

引用:[https://ardamis.com/2008/05/26/a-php-script-for-testing-a-mysql-database-connection/][1]

关于php - 如何通过php检查mysql表是否可访问,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33041244/

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