标签：meta apple ace new select nts orange UNC buffer
ob 函数的使用
1. 页面静态化
$id = isset($_GET[‘id‘])?$_GET[‘id‘]-0:0;
$filename = "html/".date("Ymd")."/news-id".$id.".html";
if(!file_exists("html/".date("Ymd"))){
mkdir("html/".date("Ymd"));
}
echo $filename;
if(!file_exists($filename) || filemtime($filename)+60<time()){
ob_start();
require "conn.php";
$sql = "select * from news where id=‘$id‘";
$res = $db->query($sql);
$row = $res->fetch_assoc();
if($row){
echo "<table border=‘1‘>";
echo "<tr>";
echo "<td>ID</td>";
echo "<td>标题</td>";
echo "<td>内容</td>";
echo "</tr>";
echo "<tr>";
echo "<td>".$row[‘id‘]."</td>";
echo "<td>".$row[‘title‘]."</td>";
echo "<td>".$row[‘content‘]."</a></td>";
echo "</tr>";
echo "</table>";
}else{
echo "没有数据";
}
$content = ob_get_contents();
ob_end_clean();
file_put_contents($filename,$content);
}
require $filename;
2. 因为原来的php是按脚本顺序执行的 如果前面输出了内容 ，执行到后面又想对前面已经输出的内容要修改，这时候就有用
用法示例 $buffer 为缓存内容
<?php
function callback($buffer)
{
// replace all the apples with oranges
return (str_replace("apples", "oranges", $buffer));
}
ob_start("callback");
?>
<html>
<body>
<p>It‘s like comparing apples to oranges.</p>
</body>
</html>
<?php
ob_end_flush();
?>
标签：meta apple ace new select nts orange UNC buffer
原文地址：https://www.cnblogs.com/hehexu/p/9190417.html
