Praktik terbaik:Impor file mySQL di PHP; membagi kueri

Berikut adalah fungsi ramah memori yang seharusnya dapat membagi file besar dalam kueri individual tanpa perlu membuka seluruh file sekaligus :

function SplitSQL($file, $delimiter = ';')
{
    set_time_limit(0);

    if (is_file($file) === true)
    {
        $file = fopen($file, 'r');

        if (is_resource($file) === true)
        {
            $query = array();

            while (feof($file) === false)
            {
                $query[] = fgets($file);

                if (preg_match('~' . preg_quote($delimiter, '~') . '\s*$~iS', end($query)) === 1)
                {
                    $query = trim(implode('', $query));

                    if (mysql_query($query) === false)
                    {
                        echo '<h3>ERROR: ' . $query . '</h3>' . "\n";
                    }

                    else
                    {
                        echo '<h3>SUCCESS: ' . $query . '</h3>' . "\n";
                    }

                    while (ob_get_level() > 0)
                    {
                        ob_end_flush();
                    }

                    flush();
                }

                if (is_string($query) === true)
                {
                    $query = array();
                }
            }

            return fclose($file);
        }
    }

    return false;
}

Saya mengujinya pada dump SQL phpMyAdmin yang besar dan berhasil dengan baik.

Beberapa data pengujian:

CREATE TABLE IF NOT EXISTS "test" (
    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
    "name" TEXT,
    "description" TEXT
);

BEGIN;
    INSERT INTO "test" ("name", "description")
    VALUES (";;;", "something for you mind; body; soul");
COMMIT;

UPDATE "test"
    SET "name" = "; "
    WHERE "id" = 1;

Dan masing-masing keluaran:

SUCCESS: CREATE TABLE IF NOT EXISTS "test" ( "id" INTEGER PRIMARY KEY AUTOINCREMENT, "name" TEXT, "description" TEXT );
SUCCESS: BEGIN;
SUCCESS: INSERT INTO "test" ("name", "description") VALUES (";;;", "something for you mind; body; soul");
SUCCESS: COMMIT;
SUCCESS: UPDATE "test" SET "name" = "; " WHERE "id" = 1;