How to use PHP+MySQL to count the number of records in each table in the database and arrange them in descending order

The example in this article describes the method of PHP+MySQL to count the number of records in each table in the library and arrange them in descending order. Share it with everyone for your reference, as follows:

This is a simple code that can count the number of records in each table in the database and arrange them in descending order

$host = '127.0.0.1';
$port = 3306;
$dbname = 'test';
$username = 'root';
$password = '';
function ee($p)
{
  if(PHP_SAPI == 'cli')
  {
    echo "\n";
  }else{
    echo "<pre class="brush:php;toolbar:false">";
  }
  print_r($p);
  if(PHP_SAPI == 'cli')
  {
    echo "\n";
  }else{
    echo "<pre class="brush:php;toolbar:false">";
  }
}
$dsn = "mysql:host={$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);
}

More about PHP related content Interested readers can check out the special topics of this site: "Introduction Tutorial on PHP + MySQL Database Operation", "Summary of Common PHP Database Operation Skills", "Summary of PHP Database Operation Skills Based on PDO" and "Introduction Tutorial on PHP Basic Syntax"

Hope this article The above will be helpful to everyone in PHP programming.

The above introduces the method of PHP+MySQL to count the number of records in each table in the database and arrange them in descending order, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.