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# PDOStatement->fetchAll()

(no version information, might be only in CVS)

PDOStatement->fetchAll() -- Returns an array containing all of the result set rows

## Descrição

class PDOStatement {
array fetchAll ( [int fetch_style [, int column_index]] )
}

## Parâmetros

`fetch_style`

  Controls the contents of the returned array as documented in PDOStatement->fetch(). Defaults to `PDO::FETCH_BOTH`.

  To return an array consisting of all values of a single column from the result set, specify `PDO::FETCH_COLUMN`. You can specify which column you want with the `column-index` parameter.

  To fetch only the unique values of a single column from the result set, bitwise-OR `PDO::FETCH_COLUMN` with `PDO::FETCH_UNIQUE`.

  To return an associative array grouped by the values of a specified column, bitwise-OR `PDO::FETCH_COLUMN` with `PDO::FETCH_GROUP`.

`column_index`

  Returns the indicated 0-indexed column when the value of `fetch_style` is `PDO::FETCH_COLUMN`. Defaults to `0`.

## Valores de retornado

PDOStatement->fetchAll() returns an array containing all of the remaining rows in the result set. The array represents each row as either an array of column values or an object with properties corresponding to each column name.

Using this method to fetch large result sets will result in a heavy demand on system and possibly network resources. Rather than retrieving all of the data and manipulating it in PHP, consider using the database server to manipulate the result sets. For example, use the WHERE and SORT BY clauses in SQL to restrict results before retrieving and processing them with PHP.

## Exemplos

Exemplo 1. Fetch all remaining rows in a result set
`<?php $sth = $dbh->prepare("SELECT name, colour FROM fruit"); $sth->execute(); /* Fetch all of the remaining rows in the result set */ print("Fetch all of the remaining rows in the result set:\n"); $result = $sth->fetchAll(); print_r($result); ?>`
O exemplo acima irá imprimir:
    Fetch all of the remaining rows in the result set:
    Array
    (
        [0] => Array
            (
                [NAME] => pear
                [0] => pear
                [COLOUR] => green
                [1] => green
            )

        [1] => Array
            (
                [NAME] => watermelon
                [0] => watermelon
                [COLOUR] => pink
                [1] => pink
            )

    )

Exemplo 2. Fetching all values of a single column from a result set The following example demonstrates how to return all of the values of a single column from a result set, even though the SQL statement itself may return multiple columns per row.
`<?php $sth = $dbh->prepare("SELECT name, colour FROM fruit"); $sth->execute(); /* Fetch all of the values of the first column */ $result = $sth->fetchAll(PDO::FETCH_COLUMN, 0); var_dump($result); ?>`
O exemplo acima irá imprimir:
    Array(3)
    (
        [0] =>
        string(5) => apple
        [1] =>
        string(4) => pear
        [2] =>
        string(10) => watermelon
    )

Exemplo 3. Grouping all values by a single column The following example demonstrates how to return an associative array grouped by the values of the specified column in the result set. The array contains three keys: values `apple` and `pear` are returned as arrays that contain two different colours, while `watermelon` is returned as an array that contains only one colour.
`<?php $insert = $dbh->prepare("INSERT INTO fruit(name, colour) VALUES (?, ?)"); $insert->execute('apple', 'green'); $insert->execute('pear', 'yellow'); $sth = $dbh->prepare("SELECT name, colour FROM fruit"); $sth->execute(); /* Group values by the first column */ var_dump($sth->fetchAll(PDO::FETCH_COLUMN|PDO::FETCH_GROUP)); ?>`
O exemplo acima irá imprimir:
    array(3) {
      ["apple"]=>
      array(2) {
        [0]=>
        string(5) "green"
        [1]=>
        string(3) "red"
      }
      ["pear"]=>
      array(2) {
        [0]=>
        string(5) "green"
        [1]=>
        string(6) "yellow"
      }
      ["watermelon"]=>
      array(1) {
        [0]=>
        string(5) "green"
      }
    }

## Veja também

PDO->query()
PDOStatement->fetch()
PDOStatement->fetchColumn()
PDO->prepare()
PDOStatement->setFetchMode()

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