如何将输出html存储到php中的var？

how to store output html to an var in php ?

how to set $a = require(xx.php)?
the xx.php outputs html , i want to store this html to a var , how to do?
please see my codes bellow:

a.php codes:

<?php
    // a.php
    echo 'hello world';
?>

b.php

<pre>
<?php
    ob_start();
    $a=require('a.php');
    ob_clean();
    echo $a;    // get '1' but not 'hello world'

    // can not post , why?
    // can not post , why?
    // can not post , why?
    // can not post , why?
    // can not post , why?
    // can not post , why?

?>

The result of the "require" is not what you want. Try:

ob_start();
require('a.php');
$a = ob_get_clean();
echo $a;

You're after ob_get_clean():

$a = ob_get_clean();

You could also use shell_exec

<?php

    $out = shell_exec("php -s $File");   
?>

see: http://php.net/shell_exec

Hi according to your case you want output of any PHP page which you want to use in your current page in that case you need to use CURL in PHP

    $ch = curl_init('a.php');

    $htmlResponse = curl_exec($ch); 
                curl_close($ch);

echo $htmlResponse ;
die;

finally, I got the answer.

<?php
    ob_start();
    require('a.php');
    $a=ob_get_clean();
    echo $a;    // get '1' but not 'hello world'


?>