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pg_fetch_object

(PHP 4, PHP 5, PHP 7, PHP 8)

pg_fetch_object — Fetch a row as an object

Опис

pg_fetch_object(
    PgSql\Result $result,
    ?int $row = null,
    string $class = "stdClass",
    array $constructor_args = []
): object|false

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.

Зауваження: Ця функція встановлює NULL-полям значення PHP null.

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

Параметри

result

Примірник PgSql\Result, якого повертає одна з функцій pg_query(), pg_query_params() або pg_execute() (серед інших).

row

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

class

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

constructor_args

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

Значення, що повертаються

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.

Помилки/виключення

A ValueError is thrown when the constructor_args is non-empty with the class not having constructor.

Журнал змін

Версія Опис
8.3.0 Now throws a ValueError exception when the constructor_args is non-empty with the class not having constructor; previously an Exception was thrown.
8.1.0 Тепер параметр result має бути примірником PgSql\Result. Раніше очікувався resource.

Приклади

Приклад #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);

?>

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