在变量中包含PHP？

问题描述：

Say I have

$output = '';

and I want to include the following code within the double ''.

<ul class="nav megamenu">
<?php if (!$logged) { ?>
<li class="home">
    <a href="?route=common/home">
    <span class="menu-title">Home</span>
    </a>
</li>
<?php } ?>
<?php if ($logged) { ?>
<li class="home">
    <a href="?route=subscribers/home">
    <span class="menu-title">Home</span>
    </a>
</li>
<?php } ?>

How could I go about doing this?

说我有 p>

  $ output =''; \  n  code>  pre> 
 
 我希望在双'' code>中包含以下代码。 p> 
 
 
 ＆lt; ul class =“nav megamenu”＆gt; 
＆lt;？php if（！$ logged）{？＆gt; 
＆lt; li class =“home”＆gt; 
＆lt; a href =“？route = common  / home“＆gt; 
＆lt; span class =”menu-title“＆gt;主页＆lt; / span＆gt; 
＆lt; / a＆gt; 
＆lt; / li＆gt; 
＆lt;？php}？＆gt; 
＆lt;？  php if（$ logged）{？＆gt; 
＆lt; li class =“home”＆gt; 
＆lt; a href =“？route = subscribers / home”＆gt; 
＆lt; span class =“menu-title”  ＆gt;主页＆lt; / span＆gt; 
＆lt; / a＆gt; 
＆lt; / li＆gt; 
＆lt;？php}？＆gt; 
  code>  pre> 
 
 我怎么能去 关于这样做？ p> 
  div>

答

You could use output buffering, something like this:

<?php ob_start();?>

<ul class="nav megamenu">
<?php if (!$logged) { ?>
<li class="home">
    <a href="?route=common/home">
    <span class="menu-title">Home</span>
    </a>
</li>
<?php } ?>
<?php if ($logged) { ?>
<li class="home">
    <a href="?route=subscribers/home">
    <span class="menu-title">Home</span>
    </a>
</li>
<?php } ?>

<?php
    $output = ob_get_contents();
    ob_end_clean();  
?>

See In Action

Using this method of starting a buffer and then assigning the result to a variable is very handy and is used in some MVC frameworks.

Simple example:

<?php
/* Assign an array of values that will be passed 
 * to the loader then extracted into local variables */
$data['logged']=true;
$output = loadContentView('top_nav', $data);


function loadContentView($view, $data=null){
    $path = SITE_ROOT.'/path/to/views/'.$view.'.php';

    if (file_exists($path) === false){
        return('<span style="color:red">Content view not found: '.$path.'</span>');
    }
    /* Extract $data passed to this function */
    if($data != null){
        extract($data);
    }
    ob_start();
    require($path);
    $return = ob_get_contents();
    ob_end_clean();
    return $return;
}
?>

答

I just changed my code to this instead... much easier

Thanks everyone for all the help!

<?php

if (!$this->customer->isLogged()) {
$output = '<ul class="nav megamenu"><li class="home"><a href="?route=subscribers/home"><span class="menu-title">Home</span></a></li>';
}else{
$output = '<ul class="nav megamenu"><li class="home"><a href="?route=common/home"><span class="menu-title">Home</span></a></li>';
}

?>

在变量中包含PHP？

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