PHP简单mysql管理工具,支持执行多条mysql语句!

<?php
header('Content-Type:text/html;charset=GBK');
?>
<form action="" method="post">
<textarea name="sql" cols="90" rows="12"></textarea><br />
<input name="" type="Submit" value="OK!!" />
</form>
<?php
if(isset($_GET['sg'])){
$_SESSION['sg']=$_GET['s'];
}
if(isset($_GET['su'])){
$_SESSION['su']=$_GET['s'];
}

if(isset($_POST['sql'])){
$conn = mysql_connect('127.0.0.1', "root", "123qwe");

if (!$conn) {
echo "Unable to connect to DB: " . mysql_error();
exit;
}

if (!mysql_select_db("pm")) {
echo "Unable to select mydbname: " . mysql_error();
exit;
}
if($_SESSION['sg']){
mysql_query("set names 'gbk'") or die(mysql_error());
}
if($_SESSION['su']){
mysql_query("set names 'utf8'") or die(mysql_error());
}
$sql =trim($_POST['sql']);

preg_match_all("/(select|show|update|delete|drop|create|alter|insert)/s+(([`'/"])[^`'/"]+//3|[^;])+;?/i",$sql,$out,PREG_PATTERN_ORDER );
if(count($out[0])==0) echo "No sql<br/>";

//2009-03-19 解决不输入无分号找不到sql的问题

for($i=0;$i<count($out[0]);$i++){
$sql = $out[0][$i];
if(substr(strtolower($sql),0,6)=='select'&&strpos($sql,"()")===false&&!preg_match("/limit /d+(,/d+)?$/i",$sql)){
$sql .= " limit 100";
}
echo '$sql='.$sql.'<hr>';

$result = mysql_query(stripslashes($sql));

if (!$result) {
echo "<font color=#ff0000>Could not successfully run query ($sql) from DB: " . mysql_error()."</font>";
continue;
}

if (mysql_num_rows($result) == 0) {
echo "No rows found, nothing to print so am exiting";
continue;
}

// While a row of data exists, put that row in $row as an associative array
// Note: If you're expecting just one row, no need to use a loop
// Note: If you put extract($row); inside the following loop, you'll
// then create $userid, $fullname, and $userstatus
$str = "";
while ($row = mysql_fetch_assoc($result)) {
if($str == ""){
$str = '<tr bgcolor="#003366" style="color:#ffffff">';
foreach($row as $k=>$v){
$str .= "<td>".$k."</td>";
}
$str .= "</tr>";
}
$str .= "<tr>";
foreach($row as $k=>$v){
$str .= "<td>".$v."</td>";
}
$str .= "</tr>";
}
@mysql_free_result($result);
echo "<table border=1 >";
echo $str;
echo "</table>";
}
}
?>