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I'm trying to whip up a skeleton View system in PHP, but I can't figure out how to get embedded views to receive their parent's variables. For example:
View Class
class View
{
private $_vars=array();
private $_file;
public function __construct($file)
{
$this->_file='views/'.$file.'.php';
}
public function set($var, $value=null)
{
if (is_array($var))
{
$this->_vars=array_merge($var, $this->_vars);
}
else
$this->_vars[$var]=$value;
return $this;
}
public function output()
{
if (count($this->_vars))
extract($this->_vars, EXTR_REFS);
require($this->_file);
exit;
}
public static function factory($file)
{
return new self($file);
}
}
test.php (top level view)
<html>
<body>
Hey <?=$name?>! This is <?=$adj?>!
<?=View::factory('embed')->output()?>
</body>
</html>
embed.php (embedded in test.php
<html>
<body>
Hey <?=$name?>! This is an embedded view file!!
</body>
</html>
Code:
$vars=array(
'name' => 'ryan',
'adj' => 'cool'
);
View::factory('test')->set($vars)->output();
Output:
Hey ryan! This is cool! Hey [error for $name not being defined]
this is an embedded view file!!
The problem is the variables I set in the top level view do not get passed to the embedded view. How could I make that happen?
624
So, I'm not exactly answering your question, but here's my super-simple hand-grown template system. It supports what you're trying to do, although the interface is different.
// Usage
$main = new SimpleTemplate("templating/html.php");
$main->extract($someObject);
$main->extract($someArray);
$main->name = "my name";
$subTemplate = new SimpleTemplate("templating/another.php");
$subTemplate->parent($main);
$main->placeholderForAnotherTemplate = $subTemplate->run();
echo $main; // or $main->run();
// html.php
<html><body><h1>Title <?= $name ?></h1><p><?= $placeHolderForAnotherTemplate ?></p></body></html>
<?php
// SimpleTemplate.php
function object_to_array($object)
{
$array = array();
foreach($object as $property => $value)
{
$array[$property] = $value;
}
return $array;
}
class SimpleTemplate
{
public $source;
public $path;
public $result;
public $parent;
public function SimpleTemplate($path=false, $source=false)
{
$this->source = array();
$this->extract($source);
$this->path($path);
}
public function __toString()
{
return $this->run();
}
public function extract($source)
{
if ($source)
{
foreach ($source as $property => $value)
{
$this->source[$property] = $value;
}
}
}
public function parent($parent)
{
$this->parent = $parent;
}
public function path($path)
{
$this->path = $path;
}
public function __set($name, $value)
{
$this->source[$name] = $value;
}
public function __get($name)
{
return isset($this->source[$name]) ? $this->source[$name] : "";
}
public function mergeSource()
{
if (isset($this->parent))
return array_merge($this->parent->mergeSource(), $this->source);
else
return $this->source;
}
public function run()
{
ob_start();
extract ($this->mergeSource());
include $this->path;
$this->result = ob_get_contents();
ob_end_clean();
return $this->result;
}
}
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