(PHP 8 >= 8.4.0)
Pdo\Sqlite::createCollation — 註冊一個使用者定義的函式，以便在 SQL 陳述式中用作排序函式
此方法與 Pdo\Sqlite::createFunction() 類似，不同之處在於它註冊用於校對字串的函式。
範例 #1 Pdo\Sqlite::createCollation() 範例
<?php
$db = new Pdo\Sqlite('sqlite::memory:');
$db->exec("CREATE TABLE test (col1 string)");
$db->exec("INSERT INTO test VALUES ('a1')");
$db->exec("INSERT INTO test VALUES ('a10')");
$db->exec("INSERT INTO test VALUES ('a2')");
$db->sqliteCreateCollation('NATURAL_CMP', 'strnatcmp');
foreach ($db->query("SELECT col1 FROM test ORDER BY col1") as $row) {
echo $row['col1'] . "\n";
}
echo "\n";
foreach ($db->query("SELECT col1 FROM test ORDER BY col1 COLLATE NATURAL_CMP") as $row) {
echo $row['col1'] . "\n";
}
?>以上範例將輸出
a1 a10 a2 a1 a2 a10