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<?php |
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/** |
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* This file is part of the League.csv library |
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* |
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* @license http://opensource.org/licenses/MIT |
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* @link https://github.com/thephpleague/csv/ |
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* @version 9.0.0 |
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* @package League.csv |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace League\Csv; |
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use ReflectionClass; |
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use Traversable; |
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/** |
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* Returns the BOM sequence found at the start of the string |
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* |
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* If no valid BOM sequence is found an empty string is returned |
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* |
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* @param string $str |
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* |
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* @return string |
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*/ |
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function bom_match(string $str): string |
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{ |
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static $list; |
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$list = $list ?? (new ReflectionClass(ByteSequence::class))->getConstants(); |
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foreach ($list as $sequence) { |
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if (0 === strpos($str, $sequence)) { |
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return $sequence; |
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} |
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} |
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return ''; |
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} |
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/** |
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* Detect Delimiters usage in a CSV object |
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* |
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* Returns a associative array where each key represents |
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* a submitted delimiter and each value the number CSV fields found |
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* when processing at most $limit CSV records with the given delimiter |
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* |
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* @param Reader $csv the CSV object |
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* @param string[] $delimiters the delimiters to consider |
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* @param int $limit Detection is made using up to $limit CSV records |
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* |
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* @return int[] |
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*/ |
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function delimiter_detect(Reader $csv, array $delimiters, int $limit = 1): array |
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{ |
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$found = array_unique(array_filter($delimiters, function (string $value): bool { |
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return 1 == strlen($value); |
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})); |
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$stmt = (new Statement())->limit($limit)->where(function (array $record): bool { |
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return count($record) > 1; |
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}); |
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$reducer = function (array $result, string $delimiter) use ($csv, $stmt): array { |
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$records = $stmt->process($csv->setDelimiter($delimiter)); |
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$result[$delimiter] = count(iterator_to_array($records, false), COUNT_RECURSIVE); |
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return $result; |
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}; |
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$delimiter = $csv->getDelimiter(); |
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$header_offset = $csv->getHeaderOffset(); |
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$csv->setHeaderOffset(null); |
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$stats = array_reduce($found, $reducer, array_fill_keys($delimiters, 0)); |
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$csv->setHeaderOffset($header_offset)->setDelimiter($delimiter); |
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return $stats; |
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} |
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if (!function_exists('\is_iterable')) { |
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/** |
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* Tell whether the contents of the variable is iterable |
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* |
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* @see http://php.net/manual/en/function.is-iterable.php |
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* |
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* @param array|Traversable $iterable |
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* |
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* @return bool |
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*/ |
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function is_iterable($iterable): bool |
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{ |
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return is_array($iterable) || $iterable instanceof Traversable; |
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} |
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} |
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thephpleague /
csv
