PHP如何实现数据库连接池

PHP如何实现数据库连接池

首先定义一个类并声明一个属性作为连接池子；然后在构造方法中向池子进行填充连接实例；最后再定义一个取出方法和放回方法，取出时将连接池最后一个连接实例进行出栈并返回，放回时将连接实例压入连接池末栈即可。

实例代码：

<?php
namespace DbConnect;

class Pool
{

 protected $size = 10;

 protected $connects = [];

 protected $dbConf = [
 'hostname' => '127.0.0.1',
 'username' => 'root',
 'password' => '123456',
 'dbname' => 'dbname'
 ];

 public function __construct($size = 10, $dbConf = [])
 {
 $this->size = $size;

 $this->dbdbConf = array_merge($this->dbdbConf, $dbdbConf);

 for($index = 1; $index <= $this->size; $index ++) {

 $connect = mysqli_connect(
 $this->dbConf['hostname'],
 $this->dbConf['username'],
 $this->dbConf['password'],
 $this->dbConf['dbname']
 );

 array_push($this->connects, $connect);
 }
 }

 public function getConnect()
 {
 if (count($this->connects) <= 0) {
 throw new ErrorException( "数据库连接池中已无链接资源，请稍后重试!" );
 } else {
 return array_pop($this->connects);
 }

 }

 public function release($connect)
 {
 if (count($this->connects) >= $this->size) {
 throw new ErrorException("数据库连接池已满");
 } else {
 array_push($this->connects, $connect);
 }
 }

}

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