實例化一個基於PHP中的參數的類

Question

我有一個稍微不同的問題，我在另一個類中實例化一個類，當我手動調用該方法時，該類不起作用，但不會自動化。代碼如下：

class Button { 
    function __construct($params = Array()) { 
     // get some common properties 
    } 
} 

class HelperButton extends Button { 
    function __construct($params = Array()) { 
     parent::__construct($params); 
    } 
    function getHelperButton() { 
     //generate helper button code 
    } 
} 

我使用上面的類以下類

include_once('field.class.php'); 
include_once('buttons.class.php'); 

class Field { 
    function __construct() { 

    } 
    function setName($name){ 
     $this->name = $name; 
    } 
} 

class TextField extends Field { 
    function __construct() { 
     parent::__construct(); 
    } 
    function setFiller($fill = "") { 
     $helperbtn = new HelperButton($fill); 
     $this->helperbtn = $helperbtn->getHelperButton(); 
    } 
    function getTextField(){ 
     $this->textfield = "<input name='blah' />".$this->heperbtn; 
     return $this->textfield; 
    } 
} 

class Segment extends Field { 
    function __construct() { 
     parent::__construct(); 
    } 
    function addTextField($params = array()) { 
     if(is_array($params)){ 
      $txtfld = new TextField(); 
     } 
     if (isset($params['type']['filler'])) { 
      $txtfld->setFiller($params['type']['fill']); 
     } 
     $this->segment .= $txtfld->getTextField(); 
    } 
    function addFillerField($params = array()) { 
     $params['type']['filler'] = true; 
     $this->addTextField($params); 
    } 
} 

現在，我使用參數生成文本字段在我的頁面動態。以下代碼運行良好：

$segment = new Segment(); 
$segment->addFillerField("type"=>array("filler"=>true,"fill"=>"sometext")); //this should add a button next to the field which will open a window that will load the 'fill' text 
$segment->render(); // this will print the segment output to screen 

但是，下面的代碼不起作用。它打印文本字段好，但它不打印按鈕：

$fldmthds = array("FLRFLD" => "FillerField"); 
$pagedtl = array("FCLSID" => "FLRFLD", "FLDNAM" => "Field Name", "FLDTYP" => "filler:true,fill:sometext"); 

$mysegment = new Segment(); 

foreach ($pagedtl as $flds => $val) { 
    $mthd = "add" . $fldmthds[$val['FCLSID']]; // resolves to addFillerField 
    $params = array(
     'name' => $val['FLDNAM'], 
     'type' => json_decode("{" . $val['FLDTYP'] . "}", true) 
    ); 

    $mysegment->{$mthd}($params); 
} 
$mysegment->render(); 

PHP沒有給出任何錯誤/警告。它只是沉默，忘記了按鈕。有人看到這裏出了什麼問題嗎？謝謝你的時間。

Answer 1

目前無法評論......只有一件事：json_decode（）會失敗。要收到有效的json更改{filler:true,fill:sometext}至{"filler": true, "fill": "sometext"}