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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Filter;
use Traversable;
class StringTrim extends AbstractFilter
{
/**
* @var array
*/
protected $options = [
'charlist' => null,
];
/**
* Sets filter options
*
* @param string|array|Traversable $charlistOrOptions
*/
public function __construct($charlistOrOptions = null)
{
if ($charlistOrOptions !== null) {
if (! is_array($charlistOrOptions) && ! $charlistOrOptions instanceof Traversable) {
$this->setCharList($charlistOrOptions);
} else {
$this->setOptions($charlistOrOptions);
}
}
}
/**
* Sets the charList option
*
* @param string $charList
* @return self Provides a fluent interface
*/
public function setCharList($charList)
{
if (! strlen($charList)) {
$charList = null;
}
$this->options['charlist'] = $charList;
return $this;
}
/**
* Returns the charList option
*
* @return string|null
*/
public function getCharList()
{
return $this->options['charlist'];
}
/**
* Defined by Zend\Filter\FilterInterface
*
* Returns the string $value with characters stripped from the beginning and end
*
* @param string $value
* @return string
*/
public function filter($value)
{
if (! is_string($value)) {
return $value;
}
$value = (string) $value;
if (null === $this->options['charlist']) {
return $this->unicodeTrim($value);
}
return $this->unicodeTrim($value, $this->options['charlist']);
}
/**
* Unicode aware trim method
* Fixes a PHP problem
*
* @param string $value
* @param string $charlist
* @return string
*/
protected function unicodeTrim($value, $charlist = '\\\\s')
{
$chars = preg_replace(
['/[\^\-\]\\\]/S', '/\\\{4}/S', '/\//'],
['\\\\\\0', '\\', '\/'],
$charlist
);
$pattern = '/^[' . $chars . ']+|[' . $chars . ']+$/usSD';
return preg_replace($pattern, '', $value);
}
}