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<?php
declare(strict_types=1);
namespace Palmtree\Csv\Util;
class StringUtil
{
public const BOM_UTF8 = "\xEF\xBB\xBF";
public const BOM_UTF16_BE = "\xFE\xFF";
public const BOM_UTF16_LE = "\xFF\xFE";
public const BOM_UTF32_BE = "\x00\x00\xFE\xFF";
public const BOM_UTF32_LE = "\xFF\xFE\x00\x00";
/**
* Returns whether the given string starts with the given Byte Order Mark.
*/
public static function hasBom(string $input, string $bom): bool
return strpos($input, $bom) === 0;
}
* Strips a Byte Order Mark from the beginning of a string if it is present.
public static function stripBom(string $input, string $bom): string
if (self::hasBom($input, $bom)) {
return substr($input, \strlen($bom));
return $input;
* Escapes the enclosure character recursively.
* RFC-4180 states the enclosure character (usually double quotes) should be
* escaped by itself, so " becomes "".
*
* @see https://tools.ietf.org/html/rfc4180#section-2
public static function escapeEnclosure(array $data, string $enclosure): array
foreach ($data as $key => $value) {
if (\is_array($value)) {
$data[$key] = self::escapeEnclosure($value, $enclosure);
} else {
$data[$key] = str_replace($enclosure, str_repeat($enclosure, 2), $value);
return $data;
palmtreephp /
csv
