本文实例讲述了PHP+MySQL统计该库中每个表的记录数并按递减顺序排列的方法。分享给大家供大家参考，具体如下：
这是一段简单的代码，可实现统计该数据库中每个表的记录数，并按递减顺序排列的功能
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$host = '127.0.0.1';$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);} |
希望本文所述对大家PHP程序设计有所帮助。
