PHP如何實(shí)現(xiàn)數(shù)據(jù)庫(kù)連接池

首先定義一個(gè)類(lèi)并聲明一個(gè)屬性作為連接池子；然后在構(gòu)造方法中向池子進(jìn)行填充連接實(shí)例；最后再定義一個(gè)取出方法和放回方法，取出時(shí)將連接池最后一個(gè)連接實(shí)例進(jìn)行出棧并返回，放回時(shí)將連接實(shí)例壓入連接池末棧即可。

實(shí)例代碼：

<?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( "數(shù)據(jù)庫(kù)連接池中已無(wú)鏈接資源，請(qǐng)稍后重試!" );     } else {         return array_pop($this->connects);     }    }    public function release($connect)   {     if (count($this->connects) >= $this->size) {       throw new ErrorException("數(shù)據(jù)庫(kù)連接池已滿(mǎn)");     } else {       array_push($this->connects, $connect);     }   }  }

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