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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\TextData;
use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
class Trim
{
private static $invalidChars;
/**
* TRIMNONPRINTABLE.
*
* @param mixed $stringValue String Value to check
*
* @return null|string
*/
public static function nonPrintable($stringValue = '')
{
$stringValue = Functions::flattenSingleValue($stringValue);
if (is_bool($stringValue)) {
return ($stringValue) ? Calculation::getTRUE() : Calculation::getFALSE();
}
if (self::$invalidChars === null) {
self::$invalidChars = range(chr(0), chr(31));
}
if (is_string($stringValue) || is_numeric($stringValue)) {
return str_replace(self::$invalidChars, '', trim($stringValue, "\x00..\x1F"));
}
return null;
}
/**
* TRIMSPACES.
*
* @param mixed $stringValue String Value to check
*
* @return null|string
*/
public static function spaces($stringValue = '')
{
$stringValue = Functions::flattenSingleValue($stringValue);
if (is_bool($stringValue)) {
return ($stringValue) ? Calculation::getTRUE() : Calculation::getFALSE();
}
if (is_string($stringValue) || is_numeric($stringValue)) {
return trim(preg_replace('/ +/', ' ', trim($stringValue, ' ')), ' ');
}
return null;
}
}