PHP: pg_fetch_object - Manual

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pg_fetch_result pg_fetch_assoc

Last updated: Sat, 27 Jan 2007

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# pg_fetch_object

(PHP 3 >= 3.0.1, PHP 4, PHP 5)

pg_fetch_object -- Fetch a row as an object

## Описание

object pg_fetch_object ( resource result [, int row [, int result_type]] )
object pg_fetch_object ( resource result [, int row [, string class_name [, array params]]] )

pg_fetch_object() returns an object with properties that correspond to the fetched row's field names. It can optionally instantiate an object of a specific class, and pass parameters to that class's constructor.

> Замечание: Эта функция устанавливает NULL-поля в значение `NULL` PHP.

Speed-wise, the function is identical to pg_fetch_array(), and almost as fast as pg_fetch_row() (the difference is insignificant).

> Замечание: `row` became optional in PHP 4.1.0.

> Замечание: `result_type` default changed from `PGSQL_BOTH` to `PGSQL_ASSOC` from PHP 4.3.0, since the numeric index was illegal.

> Замечание: `class_name` and `params` were added in PHP 5.0. The old form with `result_type` still exists for backwards compatibility.

## Список параметров

`result`

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

`row`

  Row number in result to fetch. Rows are numbered from 0 upwards. If omitted, next row is fetched.

`result_type`

  Ignored and deprecated. Defaults to `PGSQL_ASSOC`.

`class_name`

  The name of the class to instantiate, set the properties of and return. If not specified, a stdClass object is returned.

`params`

  An optional array of parameters to pass to the constructor for `class_name` objects.

## Возвращаемые значения

An object with one attribute for each field name in the result. Database `NULL` values are returned as `NULL`.

`FALSE` is returned if `row` exceeds the number of rows in the set, there are no more rows, or on any other error.

## Примеры

Пример 1. pg_fetch_object() example

`<?php
$database = "store";
$db_conn = pg_connect("host=localhost port=5432 dbname=$database");
if (!$db_conn) {
echo "Failed connecting to postgres database $database\n";
exit;
}
$qu = pg_query($db_conn, "SELECT * FROM books ORDER BY author");
while ($data = pg_fetch_object($qu)) {
echo $data->author . " (";
echo $data->year . "): ";
echo $data->title . "<br />";
}
pg_free_result($qu);
pg_close($db_conn);
?>`

## Смотрите также

pg_query()
pg_fetch_array()
pg_fetch_assoc()
pg_fetch_row()
pg_fetch_result()

add a note User Contributed Notes
pg_fetch_object
robeddielee at hotmail dot com
27-Jan-2006 11:38
`I noticed that many people use FOR loops to extract query data. This is the method I use to extract data.
<?php
@$members = pg_query($db_conn, 'SELECT id,name FROM boards.members ORDER BY name;');
if ($members AND pg_num_rows($members)) {
while ($member = pg_fetch_object($members)) {
echo $member->name.' ('.$member->id.')';
}
}
?>
If an error occurs (or nothing is returned) in the above code nothing will output. An ELSE clause can be added to the IF to handle query errors (or nothing being returned). Or a seperate check can be performed for the event that nothing is returned by using an ELSEIF clause.
I like this method because it doesn't use any temporary counter variables.`
oracle dot shinoda at gmail dot com
15-Nov-2004 06:13
`If you're wanting to use objects for your results, but are put off because you can't seem to apply a function to each field of the result (like stripslashes for example), try this code:
<?php
// Code to connect, do query etc etc...
$row = pg_fetch_object($result);
$vars = get_object_vars($row);
foreach ( $vars as $key => $var )
{
$row->{$key} = stripslashes($var);
}
?>`
michiel at minas-2 dot demon dot nl
16-Jun-2004 08:13
`Something I have learned to use:
$result=$pg_query (...);
$num = pg_numrows($result);
for($count=0;$count < $num && $data=pg_fetch_object($result,$count);$count++)
{
printf("<tr>\n");
printf(" <td>%s</td>\n",$data->foo);
printf(" <td>%s</td>\n",$data->bar);
printf("</tr>\n");
}`
Lars at dybdahl dot dk
14-Oct-2003 08:43
`When you retrieve the contents of a "timestamp with timezone" field, this will set the environment's timezone variables. Therefore, this is dangerous:
$s=$row->mydatefield;
$unixtimestamp=postgresqltimestamp2unix($s);
echo date("Y-m-d H:i:s",$unixtimestamp);
Here, postgresqltimestamp2unix is a function that converts the postgresql timestamp to Unix. The retrieval of the field data in the first line of the example above will influence the timezone used in date() in the third line.`
ian at eiloart dot com
09-Feb-2003 07:27
`This isn't all that useful. If you do, for example, foreach($row as $field) then you still get every value twice!
You can do something like this, though:
foreach ($line as $key => $cell){
if (! is_numeric($key)){
echo "<td>$key $cell</td>";
}
}
is is_numeric strict enough?`
inbox at bucksvsbytes dot com
16-Mar-2002 09:13
`The result_type arg is either invalid or incorrectly documented, since the "result_type is optional..." paragraph is copied verbatim from pg_fetch_array, and the PGSQL_NUM option is in conflict with the preceding paragraph's, "you can only access the data by the field names, and not by their
offsets."`
jzago at ifhamy dot insa-lyon dot fr
10-Sep-2000 03:09
`I use a loop like this:
for ($row = 0; $data = @pg_fetch_object ($res, $row); $row++) {
// do what you want with the row
}`
add a note
pg_fetch_result pg_fetch_assoc

Last updated: Sat, 27 Jan 2007
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