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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\TextData;
use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
class Extract
{
/**
* LEFT.
*
* @param mixed $value String value from which to extract characters
* @param mixed $chars The number of characters to extract (as an integer)
*/
public static function left($value = '', $chars = 1): string
{
$value = Functions::flattenSingleValue($value);
$chars = Functions::flattenSingleValue($chars);
if (!is_numeric($chars) || $chars < 0) {
return Functions::VALUE();
}
if (is_bool($value)) {
$value = ($value) ? Calculation::getTRUE() : Calculation::getFALSE();
}
return mb_substr($value, 0, $chars, 'UTF-8');
}
/**
* MID.
*
* @param mixed $value String value from which to extract characters
* @param mixed $start Integer offset of the first character that we want to extract
* @param mixed $chars The number of characters to extract (as an integer)
*/
public static function mid($value = '', $start = 1, $chars = null): string
{
$value = Functions::flattenSingleValue($value);
$start = Functions::flattenSingleValue($start);
$chars = Functions::flattenSingleValue($chars);
if (!is_numeric($start) || $start < 1 || !is_numeric($chars) || $chars < 0) {
return Functions::VALUE();
}
if (is_bool($value)) {
$value = ($value) ? Calculation::getTRUE() : Calculation::getFALSE();
}
return mb_substr($value, --$start, $chars, 'UTF-8');
}
/**
* RIGHT.
*
* @param mixed $value String value from which to extract characters
* @param mixed $chars The number of characters to extract (as an integer)
*/
public static function right($value = '', $chars = 1): string
{
$value = Functions::flattenSingleValue($value);
$chars = Functions::flattenSingleValue($chars);
if (!is_numeric($chars) || $chars < 0) {
return Functions::VALUE();
}
if (is_bool($value)) {
$value = ($value) ? Calculation::getTRUE() : Calculation::getFALSE();
}
return mb_substr($value, mb_strlen($value, 'UTF-8') - $chars, $chars, 'UTF-8');
}
}