PHP использует расширение MySQLI и PDO для тестирования и сравнения эффективности подключения базы данных MySQL

php
/**
 *Test the connection efficiency of PDO and mysqli, and connect to the MySQL database 100 times each
 */
header("Content-type:text/html;charset=utf8");
//Linking database through PDO
$pdo_startTime = microtime(true);
for($i=1;$i<=100;$i++){
 $pdo = new PDO("mysql:host=localhost;dbname=test","root","1234");
}
$pdo_endTime = microtime(true);
$pdo_time = $pdo_endTime - $pdo_startTime;
echo $pdo_time;
echo "
";
//Linking database through MySQL
$mysqli_startTime = microtime(true);
for($i=1;$i<=100;$i++){
 mysqli_connect("localhost","root","1234","test");
}
$mysqli_endTime = microtime(true);
$mysqli_time = $mysqli_endTime - $mysqli_startTime;
echo $mysqli_time;
echo "
";
if($pdo_time > $mysqli_time){
 Echo "the connection time of PDO is". Round ($PDO time / $mysqli time). "Times";
}else{
 Echo "the connection time of mysqli is". Round ($mysqli time / $PDO time). "Times";
}