検証

mysql 4.0.27 に対して接続を試みた。

client	結果
mariadb-client 10.1.18	OK
mysql-client 5.6	OK (--skip-secure-auth)
php 5.6 + pdo,mysqli	OK
ruby 2.3 + ruby-mysql (with-mysql-dir)	OK
mysql-connector-java-5.1.31-bin.jar	OK
php 5.6 + cakephp 2	OK
php 5.6 + CodeIgniter 2	OK
php 5.6 + CodeIgniter 3.1.2 (mysql_driver)	OK

client	結果
mysql 5.7	NG
php 7 + pdo,mysqli	NG
ruby 2.3 + ruby-mysql	NG
ruby 2.3 + ruby-mysql2	NG
ruby 2.3 + ruby-mysql2 (with-mysql-dir)	ビルドエラー
mysql-connector-java-5.1.32 以降	NG
php 5.6 + lumen 5, laravel 5.3	NG
php 5.6 + lumen 5 (facade)	NG
php 5.6 + cakephp 3	NG
php 5.6 + CodeIgniter 3.1.2 (mysqli_driver)	NG

MySQL :: Download MySQL Connector/J (Archived Versions)

名前	サイズ	ファイル数
lumen 5.3	33M	4928
laravel 5.3	39M	6085
CakePHP 2.9.3	13M	1517
CakePHP 3.3.9	26M	3877
CodeIgniter 2	2.0MB	190
CodeIgniter 3.1.2	2.7MB	301

CodeIgniter はマニュアル(user_guide)を除いて計測

php 7 + pdo

pdo

$mysql = new PDO('mysql:host=$dbserver;dbname=test', $user, $pass);

$sql = "select now() as now";
$rows = $mysql->query($sql)->fetchAll(PDO::FETCH_ASSOC);

foreach($rows as $key=>$val) {
        echo $val["now"];
        echo "<br>";
}

PHP Fatal error: Uncaught PDOException: PDO::__construct(): Connecting to 3.22, 3.23 & 4.0 is not supported. Server is 4.0.27-log in a.php

mysqi

$mysqli = new mysqli($dbserver, $user, $pass, "test");

$sql = "select now() as now";
if ($result = $mysqli->query($sql)) {
    while ($row = $result->fetch_assoc()) {
        echo $row["now"] . "<br>";
    }
}

mysql_connectは廃止されたので使えない

$c = mysql_connect($dbserver, $user, $pass);

PHP: どの API を使うか - Manual

ruby-mysql

a.rb

require 'mysql'

connection = Mysql::connect("127.0.0.1", "root", "root", "test")
#connection.query("set character set utf8")
rs = connection.query("show tables")
rs.each do |r|
  puts r.join ", "
end
connection.close

/etc/ld.so.conf.d/opt-mysql.conf

/opt/mysql/lib/mysql/

ソースから入れるときにmysql4が入っている場所指定

sudo gem install mysql -- --with-mysql-dir=/opt/mysql
# 以下ライブラリが生成されている様子
#/var/lib/gems/2.3.0/gems/mysql-2.9.1/lib/mysql/mysql_api.so
#/var/lib/gems/2.3.0/gems/mysql-2.9.1/ext/mysql_api/mysql_api.so
#/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/mysql-2.9.1/mysql/mysql_api.so

sudo ldconfig
ruby a.rb

接続成功した。

ruby-mysql2

require "mysql2"

$client = Mysql2::Client.new(
  :host     => "127.0.0.1",
  :username => "root",
  :password => "root",
  :database => "test"
)

sql = %{
  show tables
}
res = $client.query(sql)

res.each{|row|
  p row
}

このビルドは成功しなかった

sudo gem install mysql2 -- --with-mysql-dir=/opt/mysql

4から5への移行について

4.0から5へはvarcharとtimestampが注意
mysql40dumpというwrapper