/**
* Check a string that it satisfies Excel requirements
*
* @param mixed Value to sanitize to an Excel string
* @return mixed Sanitized value
*/
public static function checkString($pValue = null)
{
if ($pValue instanceof \PHPExcel\RichText) {
// TODO: Sanitize Rich-Text string (max. character count is 32,767)
return $pValue;
}
// string must never be longer than 32,767 characters, truncate if necessary
$pValue = \PHPExcel\Shared\StringHelper::substring($pValue, 0, 32767);
// we require that newline is represented as "\n" in core, not as "\r\n" or "\r"
$pValue = str_replace(array("\r\n", "\r"), "\n", $pValue);
return $pValue;
}