Output Control 函数
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ob_get_clean

(PHP 4 >= 4.3.0, PHP 5)

ob_get_clean — 得到当前缓冲区的内容并删除当前输出缓。

说明

string ob_get_clean ( void )

得到当前缓冲区的内容并删除当前输出缓冲区。

ob_get_clean() 实质上是一起执行了 ob_get_contents() 和 ob_end_clean()。

返回值

返回输出缓冲区的内容，并结束输出缓冲区。如果输出缓冲区不是活跃的，即返回 FALSE 。

范例

Example #1 A simple ob_get_clean() example

<?php

ob_start();

echo "Hello World";

$out = ob_get_clean();
$out = strtolower($out);

var_dump($out);
?>

以上例程会输出：


string(11) "hello world"

参见

Output Control 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: 得到当前缓冲区的内容并删除当前输出缓。

用户评论:

steven at bielik dot com (22-Feb-2011 07:57)

Also, don't forget that you will need to ob_start() again for any successive calls:

<?php
ob_start();
echo "1";
$content = ob_get_clean();

ob_start(); // This is NECESSARY for the next ob_get_clean() to work as intended.
echo "2";
$content .= ob_get_clean();

echo $content;
?>

Output: 12

Without the second ob_start(), the output is 21 ...

56ka dot prog at gmail dot com (14-Sep-2010 01:27)

Hi

Warning, this command isn't exactly like ob_get_contents() and ob_end_clean() successively. Sometimes you will have to do these two commands manually.

Today I lost 2 hours to localize that problem and to find the solution -_-'

See you

profix at cms-studio dot net (10-Jul-2008 03:01)

Maybe it can be useful

$__ob_stack=array();

function ob_break() {
global $__ob_stack;
while (ob_get_level()>0)
  array_push($__ob_stack,ob_get_clean());
}

function ob_continue() {
global $__ob_stack;
while (count($__ob_stack)>0) {
  ob_start();
  echo array_pop($__ob_stack);
  }
}

ob_start();
echo "1"; // now we write to "ob" buffer
ob_break();
echo "2"; // now we write to stdout
ob_continue();
echo "3"; // now we write again to "ob" buffer
$output=ob_get_clean();
echo $output;

// output is 213

egbert teeselink (02-Feb-2008 03:47)

If you're trying to capture the output from an included 3rd party script you don't seem to be capturing everything, the following might help:

function ob_end_clean_all()
{
    $s = "";
    do
    {
        $s = ob_get_contents() . $s;
    } while(ob_end_clean());
    return $s;
}

This function closes all nested output bufferings, therefore closing any buffers that the included script does not explicitly close. It's basically a ob_end_clean that sweeps together all the output buffers instead of just the innermost one.

ludvig dot ericson at gmail dot com (10-Aug-2005 03:10)

Notice that the function beneath does not catch errors, so throw in an @ before those ob_* calls

webmaster at ragnarokonline dot de (02-Oct-2003 01:21)

Running PHP4 < 4.3.0, you can simply add the following to use the function anyway:

<?php
if (!function_exists("ob_get_clean")) {
    function ob_get_clean() {
        $ob_contents = ob_get_contents();
        ob_end_clean();
        return $ob_contents;
    }
}
?>