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SQLite3::changes

(PHP 5 >= 5.3.0, PHP 7)

SQLite3::changes 直近の SQL 文で変更 (あるいは挿入、削除) された行の数を返す

説明

public SQLite3::changes ( void ) : int

直近の SQL 文で変更 (あるいは挿入、削除) された行の数を返します。

パラメータ

この関数にはパラメータはありません。

返り値

直近の SQL 文で変更 (あるいは挿入、削除) された行の数を表す integer 値を返します。

例1 SQLite3::changes() の例

<?php
$db 
= new SQLite3('mysqlitedb.db');

$query $db->exec('UPDATE counter SET views=0 WHERE page="test"');
if (
$query) {
    echo 
'変更された行の数: '$db->changes();
}
?>

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User Contributed Notes 2 notes

up
3
teclado at tandex dot com
4 years ago
There is an issue that may be meant or not, but in my case is annoying. If you have have a schema like the following:

[code]
pragma foreign_key = on;
create table parent (
  id integer,
  a varchar,
  primary key (id asc)
);
create table child (
  id integer,
  b varchar,
  a integer,
  primary key (id asc),
  foreign key (a) references a (id) on delete cascade on update cascade
);
[/code]

When you try to delete a parent row (delete from parent where parent.id=?) it deletes all the childs referenced to this parent, but the method SQLite3::changes() is still returning 1, as if it only have deleted the parent.
up
-5
krebs dot seb at googlemail dot com
8 years ago
It seems, that this method doesn't report the affected rows properly, when using with savepoints or a transaction.
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