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Mar 13, 2017 Replied to a topic by MrMike › PHP › 如何优化 doctrine 的查询速度？ |
可以先建立一个临时表，把你的数据丢临时表里面，再用 sql 语句做比对
Feb 6, 2017 Replied to a topic by mokeyjay › PHP › 各位用 Composer 装一个包大概需要多长时间？ |
我是用的国内 composer 镜像，一般不大的话几十秒的样子，可以按 https://pkg.phpcomposer.com/ 这里设置数据源。
Jan 16, 2017 Replied to a topic by koodai › PHP › PHP 的数组定义了键名，就不能使用索引了吗？ |
其实要处理数组，不一定要套 for 循环，有一些很好用的数组函数啊，比如：
```
$data = array(
'filed1' => array(1, 2, 3),
'filed2' => array('a', 'b', 'c'),
'filed3' => array('x', 'y', 'z'),
);
$result = array_map(function ($filed1, $filed2, $filed3) {
return "('{$filed1}','{$filed2}','{$filed3}')";
}, $data['filed1'], $data['filed2'], $data['filed3']);
echo implode(',',$result);
```
```
$data = array(
'filed1' => array(1, 2, 3),
'filed2' => array('a', 'b', 'c'),
'filed3' => array('x', 'y', 'z'),
);
$result = array_map(function ($filed1, $filed2, $filed3) {
return "('{$filed1}','{$filed2}','{$filed3}')";
}, $data['filed1'], $data['filed2'], $data['filed3']);
echo implode(',',$result);
```
Jan 9, 2017 Replied to a topic by nolo › PHP › 如何用 php 实现类似微信红包过期自动退回的功能 |
@yuanchao 你说的对，我只是觉得这样可能管理起 crontab 来会简单点
Jan 9, 2017 Replied to a topic by nolo › PHP › 如何用 php 实现类似微信红包过期自动退回的功能 |
突然想到 Laravel 框架里有个任务调度器 https://laravel-china.org/docs/5.1/scheduling
Jan 3, 2017 Replied to a topic by mokeyjay › 程序员 › 感觉自己的架构水平好弱，请问有没有推荐的最佳实践教材？ |
尝试下 Laravel 框架，看看源码
Sep 18, 2016 Replied to a topic by dangyuluo › PHP › PHP 如何优雅地实现类中变量的懒初始化（ Initialized when visited） |
第一次回复，这种懒加载可以用闭包哦
class DB
{
private $binds = [];
private $instances = [];
public function __construct()
{
$this->bind('a', function ($config) {
return new A($config);
});
$this->bind('b', function ($config) {
return new B($config);
});
}
private function bind($key, Closure $closure)
{
if (!isset($this->binds[$key])) {
$this->binds[$key] = $closure;
}
}
public function make($key, array $params)
{
if (isset($this->instances[$key])) {
return $this->instances[$key];
}
if (!isset($this->binds[$key])) {
return false;
}
$this->instances[$key] = call_user_func_array($this->binds[$key], $params);
return $this->instances[$key];
}
}
class A
{
private $config;
public function __construct($config)
{
$this->config = $config;
}
public function foo()
{
echo "Class A:\n";
var_dump($this->config);
}
}
class B
{
private $config;
public function __construct($config)
{
$this->config = $config;
}
public function foo()
{
echo "Class B:\n";
var_dump($this->config);
}
}
$db = new DB();
$a = $db->make('a', ['config for a']);
$a->foo();
$b = $db->make('b', ['config for b']);
$b->foo();
这确实是单例+依赖注入的问题
DB 类一般是要做单例的，这里只是写个例子就直接 new 了，不对的话请指教
class DB
{
private $binds = [];
private $instances = [];
public function __construct()
{
$this->bind('a', function ($config) {
return new A($config);
});
$this->bind('b', function ($config) {
return new B($config);
});
}
private function bind($key, Closure $closure)
{
if (!isset($this->binds[$key])) {
$this->binds[$key] = $closure;
}
}
public function make($key, array $params)
{
if (isset($this->instances[$key])) {
return $this->instances[$key];
}
if (!isset($this->binds[$key])) {
return false;
}
$this->instances[$key] = call_user_func_array($this->binds[$key], $params);
return $this->instances[$key];
}
}
class A
{
private $config;
public function __construct($config)
{
$this->config = $config;
}
public function foo()
{
echo "Class A:\n";
var_dump($this->config);
}
}
class B
{
private $config;
public function __construct($config)
{
$this->config = $config;
}
public function foo()
{
echo "Class B:\n";
var_dump($this->config);
}
}
$db = new DB();
$a = $db->make('a', ['config for a']);
$a->foo();
$b = $db->make('b', ['config for b']);
$b->foo();
这确实是单例+依赖注入的问题
DB 类一般是要做单例的，这里只是写个例子就直接 new 了，不对的话请指教
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