(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。
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 。
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"
sergei dot solomonov at gmail dot com (2012-08-25 16:20:19)
<?php
ob_start();
echo "1";
$content = ob_get_clean();
echo "2";
$content .= ob_get_clean();
echo $content;
?>
This script outputs 21 in CLI mode and 12 otherwise (under my apache and nginx)
steven at bielik dot com (2011-02-21 23:57:36)
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 (2010-09-13 17:27:52)
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 (2008-07-09 19:01:53)
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 (2008-02-02 07:47:29)
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 (2005-08-10 07:10:36)
Notice that the function beneath does not catch errors, so throw in an @ before those ob_* calls
webmaster at ragnarokonline dot de (2003-10-01 17:21:28)
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;
}
}
?>