php mysql query

<?php
/**
 * 生成mysql数据字典
 */
header("Content-type: text/html; charset=utf-8");
//配置数据库
$dbserver   = "localhost";
$dbusername = "root";
$dbpassword = "";
$database   = "fw";
 
//其他配置
$mysql_conn = @mysql_connect("$dbserver", "$dbusername", "$dbpassword") or die("Mysql connect is error.");
mysql_select_db($database, $mysql_conn);
mysql_query(&#39;SET NAMES UTF8&#39;, $mysql_conn);
$table_result = mysql_query(&#39;show tables&#39;, $mysql_conn);
 
$no_show_table = array();    //不需要显示的表
$no_show_field = array();   //不需要显示的字段
 
//取得所有的表名
while($row = mysql_fetch_array($table_result)){
    if(!in_array($row[0],$no_show_table)){
        $tables[][&#39;TABLE_NAME&#39;] = $row[0];
    }
}
//替换所以表的表前缀
if($_GET[&#39;prefix&#39;]){
    $prefix = &#39;ych&#39;;
    foreach($tables as $key => $val){
        $tableName = $val[&#39;TABLE_NAME&#39;];
        $string = explode(&#39;_&#39;,$tableName);
        if($string[0] != $prefix){  
            $string[0] = $prefix;  
            $newTableName = implode(&#39;_&#39;, $string);  
            mysql_query(&#39;rename table &#39;.$tableName.&#39; TO &#39;.$newTableName);  
        }
    }
    echo "替换成功！";exit();
}
 
//循环取得所有表的备注及表中列消息
foreach ($tables as $k=>$v) {
    $sql  = &#39;SELECT * FROM &#39;;
    $sql .= &#39;INFORMATION_SCHEMA.TABLES &#39;;
    $sql .= &#39;WHERE &#39;;
    $sql .= "table_name = &#39;{$v[&#39;TABLE_NAME&#39;]}&#39;  AND table_schema = &#39;{$database}&#39;";
    $table_result = mysql_query($sql, $mysql_conn);
    while ($t = mysql_fetch_array($table_result) ) {
        $tables[$k][&#39;TABLE_COMMENT&#39;] = $t[&#39;TABLE_COMMENT&#39;];
    }
 
    $sql  = &#39;SELECT * FROM &#39;;
    $sql .= &#39;INFORMATION_SCHEMA.COLUMNS &#39;;
    $sql .= &#39;WHERE &#39;;
    $sql .= "table_name = &#39;{$v[&#39;TABLE_NAME&#39;]}&#39; AND table_schema = &#39;{$database}&#39;";
 
    $fields = array();
    $field_result = mysql_query($sql, $mysql_conn);
    while ($t = mysql_fetch_array($field_result) ) {
        $fields[] = $t;
    }
    $tables[$k][&#39;COLUMN&#39;] = $fields;
}
mysql_close($mysql_conn);
 
 
$html = &#39;&#39;;
//循环所有表
foreach ($tables as $k=>$v) {
    $html .= &#39;  <h3>&#39; . ($k + 1) . &#39;、&#39; . $v[&#39;TABLE_COMMENT&#39;] .&#39;  （&#39;. $v[&#39;TABLE_NAME&#39;]. &#39;）</h3>&#39;."\n";
    $html .= &#39;  <table border="1" cellspacing="0" cellpadding="0" width="100%">&#39;."\n";
    $html .= &#39;      <tbody>&#39;."\n";
    $html .= &#39;          <tr>&#39;."\n";
    $html .= &#39;              <th>字段名</th>&#39;."\n";
    $html .= &#39;              <th>数据类型</th>&#39;."\n";
    $html .= &#39;              <th>默认值</th>&#39;."\n";
    $html .= &#39;              <th>允许非空</th>&#39;."\n";
    $html .= &#39;              <th>自动递增</th>&#39;."\n";
    $html .= &#39;              <th>备注</th>&#39;."\n";
    $html .= &#39;          </tr>&#39;."\n";
 
    foreach ($v[&#39;COLUMN&#39;] as $f) {
        if(!is_array($no_show_field[$v[&#39;TABLE_NAME&#39;]])){
            $no_show_field[$v[&#39;TABLE_NAME&#39;]] = array();
        }
        if(!in_array($f[&#39;COLUMN_NAME&#39;],$no_show_field[$v[&#39;TABLE_NAME&#39;]])){
            $html .= &#39;          <tr>&#39;."\n";
            $html .= &#39;              <td class="c1">&#39; . $f[&#39;COLUMN_NAME&#39;] . &#39;</td>&#39;."\n";
            $html .= &#39;              <td class="c2">&#39; . $f[&#39;COLUMN_TYPE&#39;] . &#39;</td>&#39;."\n";
            $html .= &#39;              <td class="c3">&#39; . $f[&#39;COLUMN_DEFAULT&#39;] . &#39;</td>&#39;."\n";
            $html .= &#39;              <td class="c4">&#39; . $f[&#39;IS_NULLABLE&#39;] . &#39;</td>&#39;."\n";
            $html .= &#39;        <td class="c5">&#39; . ($f[&#39;EXTRA&#39;]==&#39;auto_increment&#39;?&#39;是&#39;:&#39; &#39;) . &#39;</td>&#39;."\n";
            $html .= &#39;              <td class="c6">&#39; . $f[&#39;COLUMN_COMMENT&#39;] . &#39;</td>&#39;."\n";
            $html .= &#39;          </tr>&#39;."\n";
        }
    }
    $html .= &#39;      </tbody>&#39;."\n";
    $html .= &#39;  </table>&#39;."\n";
}
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>数据库数据字典</title>
<style>
body, td, th { font-family: "微软雅黑"; font-size: 14px; }
.warp{margin:auto; width:900px;}
.warp h3{margin:0px; padding:0px; line-height:30px; margin-top:10px;}
table { border-collapse: collapse; border: 1px solid #CCC; background: #efefef; }
table th { text-align: left; font-weight: bold; height: 26px; line-height: 26px; 
font-size: 14px; text-align:center; border: 1px solid #CCC; padding:5px;}
table td { height: 20px; font-size: 14px; border: 1px solid #CCC; background-color: #fff; padding:5px;}
.c1 { width: 120px; }
.c2 { width: 120px; }
.c3 { width: 150px; }
.c4 { width: 80px; text-align:center;}
.c5 { width: 80px; text-align:center;}
.c6 { width: 270px; }
</style>
</head>
<body>
<p class="warp">
<?php echo $html; ?>
</p>
</body>
</html>