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<?php
namespace Illuminate\View\Concerns;
use InvalidArgumentException;
trait ManagesFragments
{
/**
* All of the captured, rendered fragments.
*
* @var array
*/
protected $fragments = [];
/**
* The stack of in-progress fragment renders.
*
* @var array
*/
protected $fragmentStack = [];
/**
* Start injecting content into a fragment.
*
* @param string $fragment
* @return void
*/
public function startFragment($fragment)
{
if (ob_start()) {
$this->fragmentStack[] = $fragment;
}
}
/**
* Stop injecting content into a fragment.
*
* @return string
*
* @throws \InvalidArgumentException
*/
public function stopFragment()
{
if (empty($this->fragmentStack)) {
throw new InvalidArgumentException('Cannot end a fragment without first starting one.');
}
$last = array_pop($this->fragmentStack);
$this->fragments[$last] = ob_get_clean();
return $this->fragments[$last];
}
/**
* Get the contents of a fragment.
*
* @param string $name
* @param string|null $default
* @return mixed
*/
public function getFragment($name, $default = null)
{
return $this->getFragments()[$name] ?? $default;
}
/**
* Get the entire array of rendered fragments.
*
* @return array
*/
public function getFragments()
{
return $this->fragments;
}
/**
* Flush all of the fragments.
*
* @return void
*/
public function flushFragments()
{
$this->fragments = [];
$this->fragmentStack = [];
}
}
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