Php+mysql a method that counts the number of records in each table in the library and is sorted in descending order _php tips

Source: Internet
Author: User
Tags dsn stmt

This example describes a method that Php+mysql counts the number of records in each table in the library and in descending order. Share to everyone for your reference, specific as follows:

This is a simple piece of code that enables you to count the number of records in each table in the database, and to sort the functionality in descending order

$host = ' ';
$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};p ort={$port};d bname={$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 $e->getmessage ();}//has query Results function query ($sql) {global $pdo;
  $stmt = $pdo->query ($sql);
  $data = $stmt->fetchall (pdo::fetch_both);
return $data;
  //No query result function execute ($sql) {global $pdo;
  $affect _rows = $pdo->query ($sql);
return $affect _rows;//Impact Bar} $tables = Query ("Show Tables");
$sort _data = Array ();
  foreach ($tables as $table) {//table record Bar number $count _sql = "SELECT count (*) as num from {$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);


For more information about PHP interested readers can view the site topics: "Php+mysql Database Operation Introduction Tutorial", "PHP common database Operation skills Summary", "PHP based on PDO Operation Database skills summary" and "PHP Basic grammar Introductory Tutorial"

I hope this article will help you with the PHP program design.

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