php 通过将参数传递给 codeigniter 中的构造函数来加载库
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Load library by passing parameter to constructor in codeigniter
提问by piyush
I am using codeigniter. I defined a library in code-igniter and is expecting a parameter in its constructor.This is my library code -
我正在使用代码点火器。我在 code-igniter 中定义了一个库，并且在其构造函数中需要一个参数。这是我的库代码 -
################# [My Library Code Test_lib.php ] ########################
<?php
class Test_lib
{
var $params;
public function __construct($params)
{
$this->params = $params;
echo $this->params;
}
}
In codeigniter documentation, it is mentioned that you can pass the parameter in the second argument. So,I am initializing it from controller as below -
在 codeigniter 文档中，提到您可以在第二个参数中传递参数。所以，我从控制器初始化它如下 -
<?php
class Test_cont extends CI_Controller {
function __construct()
{
parent::__construct();
}
function test()
{
$params = "abc";
$this->load->library("test_lib",$params);
}
}
I am getting following error -
我收到以下错误 -
A PHP Error was encountered Severity: Warning Message: Missing argument.....
遇到 PHP 错误严重性：警告消息：缺少参数.....
Please assist.
请协助。
回答by Colin Brock
$paramsmust be an array. From the documentation:
$params必须是数组。从文档：
In the library loading function you can dynamically pass data as an array via the second parameter and it will be passed to your class constructor:
$params = array('type' => 'large', 'color' => 'red'); $this->load->library('Someclass', $params);
在库加载函数中，您可以通过第二个参数将数据作为数组动态传递，并将其传递给您的类构造函数：
$params = array('type' => 'large', 'color' => 'red'); $this->load->library('Someclass', $params);
In your case, you want to do something like this:
在你的情况下，你想做这样的事情：
function test()
{
$params[] = "abc"; // $params is an array
$this->load->library("test_lib",$params);
}
回答by Moyed Ansari
You just need to modify the $paramsfrom a variable to array. hope this will work
您只需要将$params从变量修改为数组。希望这会奏效
function test()
{
$params = array(1=>'abc');
$this->load->library('test_lib',$params);
}
回答by antelove
Class Test_lib
类 Test_lib
################# [My Library Code Test_lib.php ] ########################
<?php
class Test_lib {
var $parameter1;
var $parameter2;
var $parameter3;
public function __construct($parameters) {
/* array assoc */
$this->parameter1 = $parameters['argument1'];
$this->parameter2 = $parameters['argument2'];
$this->parameter3 = $parameters['argument3'];
/* object */
$oParameters = (object) $parameters;
$this->parameter1 = $oParameters->argument1;
$this->parameter2 = $oParameters->argument2;
$this->parameter3 = $oParameters->argument3;
}
}
Class Controller
类控制器
<?php
class Test_cont extends CI_Controller {
function __construct() {
parent::__construct();
}
function test() {
$data = array( // array assoc
'argument1' => 'String 1',
'argument2' => 'String 2',
'argument3' => 'String 3'
);
$this->load->library("Test_lib", $data);
return $this->Test_lib->parameter1;
}
echo $this->test(); // String 1
}
