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TabularDataReader.php
<?php /** * League.Csv (https://csv.thephpleague.com) * * (c) Ignace Nyamagana Butera <nyamsprod@gmail.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ declare(strict_types=1); namespace League\Csv; use Closure; use Countable; use Iterator; use IteratorAggregate; /** * Represents a Tabular data. * * @method Iterator fetchColumnByName(string $name) returns a column from its name * @method Iterator fetchColumnByOffset(int $offset) returns a column from its offset * @method array first() returns the first record from the tabular data. * @method array nth(int $nth_record) returns the nth record from the tabular data. * @method mixed value(int|string $column = 0) returns a given value from the first element of the tabular data. * @method Iterator nthAsObject(int $nth, string $className, array $header = []) returns the nth record from the tabular data as an instance of the defined class name. * @method Iterator firstAsObject(string $className, array $header = []) returns the first record from the tabular data as an instance of the defined class name. * @method bool each(Closure $closure) iterates over each record and passes it to a closure. Iteration is interrupted if the closure returns false * @method bool exists(Closure $closure) tells whether at least one record satisfies the predicate. * @method mixed reduce(Closure $closure, mixed $initial = null) reduces the collection to a single value, passing the result of each iteration into the subsequent iteration * @method Iterator getObjects(string $className, array $header = []) Returns the tabular data records as an iterator object containing instance of the defined class name. * @method TabularDataReader filter(Closure $closure) returns all the elements of this collection for which your callback function returns `true` * @method TabularDataReader slice(int $offset, int $length = null) extracts a slice of $length elements starting at position $offset from the Collection. * @method TabularDataReader sorted(Closure $orderBy) sorts the Collection according to the closure provided see Statement::orderBy method * @method TabularDataReader select(string|int ...$columnOffsetOrName) extract a selection of the tabular data records columns. * @method TabularDataReader matchingFirstOrFail(string $expression) extract the first found fragment identifier of the tabular data or fail * @method TabularDataReader|null matchingFirst(string $expression) extract the first found fragment identifier of the tabular data or return null if none is found * @method iterable<int, TabularDataReader> matching(string $expression) extract all found fragment identifiers for the tabular data */ interface TabularDataReader extends Countable, IteratorAggregate { /** * Returns the number of records contained in the tabular data structure * excluding the header record. */ public function count(): int; /** * Returns the tabular data records as an iterator object containing flat array. * * Each record is represented as a simple array containing strings or null values. * * If the CSV document has a header record then each record is combined * to the header record and the header record is removed from the iterator. * * If the CSV document is inconsistent. Missing record fields are * filled with null values while extra record fields are strip from * the returned object. * * @return Iterator<array-key, array<array-key, mixed>> */ public function getIterator(): Iterator; /** * Returns the header associated with the tabular data. * * The header must contain unique string or to be an empty array * if no header was specified. * * @return array<string> */ public function getHeader(): array; /** * Returns the tabular data records as an iterator object. * * Each record is represented as a simple array containing strings or null values. * * If the tabular data has a header record then each record is combined * to the header record and the header record is removed from the iterator. * * If the tabular data is inconsistent. Missing record fields are * filled with null values while extra record fields are strip from * the returned object. * * @param array<string> $header an optional header mapper to use instead of the CSV document header * * @return Iterator<array-key, array<array-key, mixed>> */ public function getRecords(array $header = []): Iterator; /** * Returns the next key-value pairs from the tabular data (first * column is the key, second column is the value). * * By default, if no column index is provided: * - the first column is used to provide the keys * - the second column is used to provide the value * * @param string|int $offset_index The column index to serve as offset * @param string|int $value_index The column index to serve as value * * @throws UnableToProcessCsv if the column index is invalid or not found */ public function fetchPairs($offset_index = 0, $value_index = 1): Iterator; /** * DEPRECATION WARNING! This class will be removed in the next major point release. * * @deprecated since version 9.9.0 * * Returns the nth record from the tabular data. * * By default, if no index is provided the first record of the tabular data is returned * * @param int $nth_record the tabular data record offset * * @throws UnableToProcessCsv if argument is less than 0 */ public function fetchOne(int $nth_record = 0): array; /** * DEPRECATION WARNING! This class will be removed in the next major point release. * * @deprecated since version 9.8.0 * * @see ::fetchColumnByName * @see ::fetchColumnByOffset * * Returns a single column from the next record of the tabular data. * * By default, if no value is supplied the first column is fetched * * @param string|int $index CSV column index * * @throws UnableToProcessCsv if the column index is invalid or not found * * @return Iterator<int, mixed> */ public function fetchColumn($index = 0): Iterator; }