After we have learned how to operate users (add, delete, modify, check), it will be very simple to develop the following functions. Most of them are the same, except that the SQL statements are different, but the principles are basically similar.
Below Let’s take a look at the display of some information about us
<?php
header("Content-type: text/html; charset=utf-8");//设置编码
require_once('conn.php');
$sql = "SELECT * FROM about order by id desc";
$res = mysql_query($sql);
//截取中文字符
function msubstr($str,$start=0,$length,$suffix=true,$charset="utf-8"){
if(function_exists("mb_substr")){
if ($suffix && mb_strlen($str, $charset)>$length)
return mb_substr($str, $start, $length, $charset)."...";
else
return mb_substr($str, $start, $length, $charset);
}elseif(function_exists('iconv_substr')) {
if ($suffix && strlen($str)>$length)
return iconv_substr($str,$start,$length,$charset)."...";
else
return iconv_substr($str,$start,$length,$charset);
}
$re['utf-8'] = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";
$re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";
$re['gbk'] = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";
$re['big5'] = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";
preg_match_all($re[$charset], $str, $match);
$slice = join("",array_slice($match[0], $start, $length));
if($suffix) return $slice."…";
return $slice;
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>展示关于我们的信息</title>
<style type="text/css">
.top{height:30px;line-height:30px;float:right;margin-right:15px;}
.top a{color:red;text-decoration:none;}
.cont{width:100%;height:300px;float:left;}
.cont_ct{float:left;}
table{width:100%;border:1px solid #eee;text-align:center;}
th{background:#eee;}
td{width:200px;height:40px;}
</style>
</head>
<body>
<div class="top"><a href="addab.php">添加信息</a></div>
<div class="cont">
<table cellspacing="0" cellpadding="0" border="1">
<tr>
<th>ID</th>
<th>标题</th>
<th>内容</th>
<th>操作</th>
</tr>
<?php
while($row = mysql_fetch_array($res)){
?>
<tr>
<td><?php echo $row['id'];?></td>
<td><?php echo $row['title'];?></td>
<td><!-- <textarea cols="50" rows="5" readonly> -->
<?php echo msubstr($row['content'],0,20);?><!-- </textarea> --></td>
<td>
<a href="modifya.php?id=<?php echo $row['id'];?>">修改</a>
<a href="delabout.php?id=<?php echo $row['id'];?>">删除</a>
</td>
</tr>
<?php
}
?>
</table>
</div>
</body>
</html>When the displayed content is too long, we need to intercept the length of the string
We have encapsulated the usage method Take a look at the code for the output content part below. Starting from 0, take 20
. Deletion and modification are also with id
Next Section