无限分类，一起学习吧-php手册-php.cn

无限分类，一起学习吧

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リリース： 2016-06-06 19:35:40

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今天学习的成果，递归，无限分类，新手入门希望多多指教。无 ?php//列出分类include '../include.php';session_start(); if(empty($_SESSION['user'])) header('location:login.php');function getList($pid=0,$result=array(),$spac=0){$spac = $spac+4; //

今天学习的成果，递归，无限分类，新手入门希望多多指教。

<?php

	//列出分类
	include '../include.php';
	session_start();
	 if(empty($_SESSION['user'])) header('location:login.php');

	function getList($pid=0,&$result=array(),$spac=0)
	{
		$spac = $spac+4; //空格补位
		$sql = "SELECT * FROM cate where pid = '$pid'"; //选择分类数据库，条件是对比pid
		$query = mysql_query($sql);
		while ($row = mysql_fetch_assoc($query)) { //取得数组
			# 美化分类，清晰一级和二级分类
			$row['catename'] = str_repeat(' ', $spac).'|--'.$row['catename'];
			$result[] = $row; //传值
			getList($row['id'],$result,$spac);
		}
		return $result;
	}
	
function displayCate($pid=0){
	$rs = getList($pid);
	$str="";
	$str.="<select name='cate'>";
	foreach ($rs as $key => $value) {
		# 下拉式显示
		$str.= "<option>{$value['catename']}</option>";
		}
			return $str.= "</select>";
	}
	echo displayCate(0);
?>

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<?php
	
	session_start();
	if(empty($_SESSION['user'])) header("location:login.php");
	include '../include.php';

	$sql = "SELECT * FROM cate order by  id asc";
	$query = mysql_query($sql);
	

?>

<html>
 <meta http-equiv="content-type" content="text/html" charset="utf8">
 <head>
 	<title>添加分类</title>
 </head>
 <body>
 <h1 align="center">添加分类</h1>
 <hr>
 		<form method="post" action="cate.php">
 	<table width="600" align="center" border="0" cellpadding="0" cellspacing="1" >
		<tr>
		 <td width="80">请输入分类</td>
		 <td width="40"><input type="text" name="catename" size="20"></td>
		 <td width="50">分类id</td>
		 <td width="30"><input type="text" name="pid"></td>
		 <td><input type="submit" name="sub" value="提交"></td>	
		</tr>

	</table>
	<!-- 方便自己查看做的实时表查看分类 -->
	<table align="center" border="1">
		<h1 align="center">现有信息表</h1>
	<hr>
	<?php 
	while($res = mysql_fetch_array($query))
		{
	?>
		<tr>
			<td>id:</td>
			<td><?php echo $res['id']; ?></td>
			<td>分类名称</td>
			<td><?php echo $res['catename']; ?></td>
			<td>pid:</td>
			<td><?php echo $res['pid']; ?></td>
			<br>
		</tr>
	
<?php
}
echo '</table>
	</form>
	</body>
	</html>';
// 实时表到这里结束

	//填写分类名称catename,pid
	if(isset($_POST['sub'])){
		$catename = $_POST['catename'];
		$pid = $_POST['pid'];
		$table = 'cate';

		if(empty($catename))
		{
			echo "分类名不能为空哦";
		}else{
			cate($table,$catename,$pid);//调用 sql.func.php中的cate分类函数
		}
	}

?>

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