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<?php
declare(strict_types=1);
namespace Laminas\Filter;
use Traversable;
use function is_array;
use function is_string;
use function preg_replace;
use function strlen;
/**
* @psalm-type Options = array{
* charlist?: string|null,
* }
* @extends AbstractFilter<Options>
* @final
*/
class StringTrim extends AbstractFilter
{
/** @var Options */
protected $options = [
'charlist' => null,
];
/**
* Sets filter options
*
* @param string|Options|iterable|null $charlistOrOptions
*/
public function __construct($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 Laminas\Filter\FilterInterface
*
* Returns the string $value with characters stripped from the beginning and end
*
* @param mixed $value
* @return string|mixed
* @psalm-return ($value is string ? string : mixed)
*/
public function filter($value)
{
if (! is_string($value)) {
return $value;
}
$value = (string) $value;
$charlist = $this->options['charlist'];
if ($charlist === null) {
return $this->unicodeTrim($value);
}
return $this->unicodeTrim($value, $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);
}
}