便于查看数据库表、字段，做一个数据字典是很有必要的，下面只需要简单更改下配置就可以用了，样式也是挺好的。
<?php
header('content-type:text/html;charset=utf-8');
define('DB_HOST','localhost');
define('DB_USER','root');
define('DB_PASS','pwd');
define('DB_NAME','dbname');
define('DB_PORT',3306);
define('DB_CHAR','utf8');
define('APPNAME','');
$conn=mysql_connect(DB_HOST.':'.DB_PORT,DB_USER,DB_PASS);
mysql_select_db(DB_NAME);
mysql_query('set names ' . DB_CHAR);
$sql="SHOW TABLE STATUS FROM " . DB_NAME;
$result=mysql_query($sql);
$array=array();
while($rows=mysql_fetch_assoc($result)){
$array[]=$rows;
}
// table count
$tab_count = count($array);
echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="zh">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>'.APPNAME.'--数据字典</title>
<style type="text/css">
table caption, table th, table td {
padding: 0.1em 0.5em 0.1em 0.5em;
margin: 0.1em;
vertical-align: top;
}
th {
font-weight: bold;
color: black;
background: #D3DCE3;
}
table tr.odd th, .odd {
background: #E5E5E5;
}
table tr.even th, .even {
background: #f3f3f3;
}
.db_table{
border-top:1px solid #333;
}
.title{font-weight:bold;}
</style>
</head>
<body>
<div style="text-align:center;background:#D3DCE3;font-size:19px;">
<b>'.APPNAME.'--数据字典</b>
</div>
<div style="background:#f3f3f3;text-align:center;">（注：共'.$tab_count.'张表，按ctrl+F查找关键字）</div>'."
";
for($i=0;$i<$tab_count;$i++){
echo '<ul type="square">'."
";
echo ' <li class="title">';
echo ($i+1).'、表名：[' . $array[$i]['Name'] . '] 注释：' . $array[$i]['Comment'];
echo '</li>'."
";
//查询数据库字段信息
$tab_name = $array[$i]['Name'];
$sql_tab='show full fields from `' . $array[$i]['Name'].'`';
$tab_result=mysql_query($sql_tab);
$tab_array=array();
while($r=mysql_fetch_assoc($tab_result)){
$tab_array[]=$r;
}
//show keys
$keys_result=mysql_query("show keys from `".$array[$i]['Name'].'`',$conn);
$arr_keys=mysql_fetch_array($keys_result);
echo '<li style="list-style: none outside none;"><table border="0" class="db_table" >';
echo '<tr class="head">
<th style="110px">字段</th>
<th>类型</th>
<th>为空</th>
<th>额外</th>
<th>默认</th>
<th style="95px">整理</th>
<th>备注</th></tr>';
for($j=0;$j<count($tab_array);$j++){
$key_name=$arr_keys['Key_name'];
if($key_name="PRIMARY"){
$key_name='主键（'.$key_name.'）';
}
$key_field=$arr_keys['Column_name'];
if ( $tab_array[$j]['Field']==$key_field){
$key_value="PK";
}else{
$key_value="";
}
echo ' <tr class="'.($j%2==0?"odd":"even").'">'."
";
echo ' <td>' . $tab_array[$j]['Field'] . '</td>'."
";
echo ' <td>' . $tab_array[$j]['Type'] . '</td>'."
";
echo ' <td>' . ($key_value!=''?$key_value:$tab_array[$j]['Null']) . '</td>'."
";
echo ' <td>' . $tab_array[$j]['Extra'] . '</td>'."
";
echo ' <td>' . $tab_array[$j]['Default'] . '</td>'."
";
echo ' <td>' . $tab_array[$j]['Collation'] . '</td>'."
";
echo ' <td>' . ($key_value!=''?$key_name:$tab_array[$j]['Comment']) . '</td>'."
";
echo ' </tr>'."
";
}
echo ' </table></li>'."
";
echo '</ul>'."
";
}
echo '</body>'."
";
echo '</html>'."
";