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php中缓冲输出实例代码

WBOY
WBOYOriginal
2016-05-25 16:38:461261browse

ob_start([string output_callback])- 打开输出缓冲区

所有的输出信息不在直接发送到浏览器,而是保存在输出缓冲区里面,可选得回调函数用于处理输出结果信息.

ob_end_flush - 结束(发送)输出缓冲区的内容,关闭输出缓冲区,实例代码如下:

<?php
ob_start(); //打开缓冲区
echo "hello world"; //输出内容
$out = ob_get_clean(); //获得缓冲区内容并且结束缓冲区
$out = strtolower($out); //将字符转换为小写
var_dump($out); //输出结果
//
if (!function_exists(&#39;ob_clean&#39;)) //判断函数是否被定义
{
    function ob_clean() //定义函数
    {
        if (@ob_end_clean()) {
            return ob_start();
        }
        trigger_error("ob_clean() failed to delete buffer.no buffer to delete.", e_user_notice);
        return false;
    }
}
//
header(&#39;content-type: multipart/x-mixed-replace;boundary=endofsection&#39;); //发送标头
print "n--endofsectionn"; //输出内容
$pmt = array(
    "-",
    "",
    "|",
    "/"
); //定义数组
for ($i = 0; $i < 10; $i++) //通过循环进行操作
{ //开源代码phprm.com
    sleep(1); //暂停执行
    print "content-type: text/plainnn"; //输出内容
    print "part $it" . $pmt[$i % 4]; //输出内容
    print "--endofsectionn"; //输出内容
    ob_flush(); //发送缓冲区数据
    flush(); //刷新输出缓冲
    
}
print "content-type: text/plainnn"; //输出内容
print "the endn"; //输出内容
print "--endofsection--n"; //输出内容


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