统计该库中每个表的记录数，并按递减顺序排列

 

 

简单的一段代码：统计该库中每个表的记录数，并按递减顺序排列

$host = '127.0.0.1';
$port = 3306;
$dbname = 'test';
$username = 'root';
$password = '';

function ee($p)
{
    if(PHP_SAPI == 'cli')
    {
        echo "\n";
    }else{
        echo "<pre>";
    }
    print_r($p);
    if(PHP_SAPI == 'cli')
    {
        echo "\n";
    }else{
        echo "<pre>";
    }
}

$dsn = "mysql:host={$host};port={$port};dbname={$dbname}";
$opts = array(PDO::ATTR_ERRMODE=>PDO::ERRMODE_EXCEPTION, PDO::ATTR_AUTOCOMMIT=>0);
try {
    $pdo = new PDO($dsn, $username, $password, $opts);
}catch(PDOException $e){
    echo $e->getMessage();
}

//有查询结果
function query($sql)
{
    global $pdo;
    
    $stmt = $pdo->query($sql);
    $data = $stmt->fetchAll(Pdo::FETCH_BOTH);
    return $data;
}

//无查询结果
function execute($sql)
{
    global $pdo;
    $affect_rows = $pdo->query($sql);
    return $affect_rows;//影响条数
}

$tables = query("show tables");

$sort_data = array();
foreach($tables as $table)
{
    //表记录条数
    $count_sql = "select count(*) as num from {$table[0]}";
    $stmt = $pdo->query($count_sql);
    $info = $stmt->fetch(Pdo::FETCH_BOTH);
    
    $pad_table = str_pad($table[0], 25, ' ');
    
    $sort_data[] = array('table'=>$pad_table, 'num'=>$info['num']);
    $sort_index[] = $info['num'];
    
}

array_multisort($sort_index, SORT_DESC, $sort_data);

foreach($sort_data as $val)
{
    $row_str = <<<eof
  {$val['table']} [{$val['num']}]
eof;
  ee($row_str);
}