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<?php |
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/** |
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* League.Csv (https://csv.thephpleague.com) |
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* |
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* (c) Ignace Nyamagana Butera <[email protected]> |
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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 function array_fill_keys; |
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use function array_filter; |
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use function array_reduce; |
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use function array_unique; |
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use function count; |
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use function iterator_to_array; |
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use function rsort; |
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use function strlen; |
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use function strpos; |
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use const COUNT_RECURSIVE; |
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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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function bom_match(string $str): string |
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{ |
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static $list; |
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if (null === $list) { |
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$list = (new ReflectionClass(ByteSequence::class))->getConstants(); |
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rsort($list); |
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} |
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foreach ($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 {@link Reader} 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 string[] $delimiters |
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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 $limit = 1): array |
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{ |
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$delimiter_filter = static function (string $value): bool { |
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return 1 === strlen($value); |
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}; |
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$record_filter = static function (array $record): bool { |
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return 1 < count($record); |
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}; |
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$stmt = Statement::create(null, 0, $limit); |
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$delimiter_stats = static function (array $stats, string $delimiter) use ($csv, $stmt, $record_filter): array { |
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$csv->setDelimiter($delimiter); |
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$found_records = array_filter( |
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iterator_to_array($stmt->process($csv)->getRecords(), false), |
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$record_filter |
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); |
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$stats[$delimiter] = count($found_records, COUNT_RECURSIVE); |
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return $stats; |
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}; |
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$current_delimiter = $csv->getDelimiter(); |
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$current_header_offset = $csv->getHeaderOffset(); |
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$csv->setHeaderOffset(null); |
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$stats = array_reduce( |
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array_unique(array_filter($delimiters, $delimiter_filter)), |
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$delimiter_stats, |
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array_fill_keys($delimiters, 0) |
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); |
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$csv->setHeaderOffset($current_header_offset); |
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$csv->setDelimiter($current_delimiter); |
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return $stats; |
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} |
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thephpleague /
csv
