PHP 7.0.6 Released

    pg_fetch_all_columns

    (PHP 5 >= 5.1.0, PHP 7)

    pg_fetch_all_columns — Fetches all rows in a particular result column as an array

    Description

    array pg_fetch_all_columns ( resource $result [, int $column = 0 ] )

    pg_fetch_all_columns() returns an array that contains all rows (records) in a particular column of the result resource.

    Note: This function sets NULL fields to the PHP NULL value.

    Parameters

    result

    PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).

    column

    Column number, zero-based, to be retrieved from the result resource. Defaults to the first column if not specified.

    Return Values

    An array with all values in the result column.

    FALSE is returned if column is larger than the number of columns in the result, or on any other error.

    Examples

    Example #1 pg_fetch_all_columns() example

    <?php 
    $conn     = pg_pconnect("dbname=publisher");
    if (!    $conn) {
      echo     "An error occurred.\n";
      exit;
    }

    $result = pg_query($conn, "SELECT title, name, address FROM authors");
    if (!    $result) {
      echo     "An error occurred.\n";
      exit;
    }

    // Get an array of all author names
    $arr = pg_fetch_all_columns($result, 1);

    var_dump($arr);

    ?>

    See Also

    User Contributed Notes

    strata_ranger at hotmail dot com
    7 years ago
    Unfortunate that pg_fetch_all_columns() doesn't support fetching a column by its name -- if you want to do that, you'll need to use pg_field_num() as an intermediary:

    For example:

    <?php

    if ($foo)
          $cols = "email_address";

    else
          $cols = "last_name, middle_init";

    $result = pg_query("Select first_name, $info, birthday from users_table");

    // Problem -- does column #2 refer to the 'birthday' or 'middle_init' field?
    $array = pg_fetch_all_columns($result, 2);

    // Won't work, must use a column number instead of its name
    $array = pg_fetch_all_columns($result, 'birthday');

    // Works
    $array = pg_fetch_all_columns($result, pg_field_num($result, 'birthday'));

    ?>
    spambin at ya dot ru
    2 years ago
    pg_fetch_all_columns() returns array (empty array) even if the result set in empty (while pg_fetch_all() returns FALSE when the result set is empty)

    <?
    $result = pg_query("
        SELECT 'something'
        WHERE 1 = 2
    ");
    var_dump( pg_fetch_all($result) ); // boolean false
    var_dump( pg_fetch_all_columns($result) ); // array(0){}
    ?>
    massiv at nerdshack dot com
    7 years ago
    php 4 equivalent:

    <?php
    $conn     = pg_pconnect("dbname=publisher");
    if (!    $conn) {
      echo     "An error occured.\n";
      exit;
    }

    $result = pg_query($conn, "SELECT title, name, address FROM authors");
    if (!    $result) {
      echo     "An error occured.\n";
      exit;
    }

    // Get an array of all author names
    $arr = array();
    while (    $line = pg_fetch_array($result)) {
          array_push($arr, $line['name']);
    }

    var_dump($arr);

    ?>
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