Question

我对类和函数都很陌生，所以我正在使用一个简单的脚本来嵌入Youtube视频和本地swf。它工作正常，但我无法更改swf中的$ width和$ height属性。如果我在函数内部创建它们，我必须将值设置为“0”，因此不会被外部值更新。它将保持为0。

有两个文件：

classMedia.php

<?php
/*Gabriel*/
class Media {

    public function embedYT($code){
        echo "<iframe width='560' height='349' src='http://www.youtube.com/embed/".$code." ' frameborder='0' allowfullscreen></iframe>";
        }

        public function embedSWF ($swf){
        $width='0';
        $height='0';
    echo "<OBJECT classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' codebase='http://active.macromedia.com/flash2/cabs/swflash.cab#version=4,0,0,0' ID=objects WIDTH=460 HEIGHT=80> 
<PARAM NAME=movie VALUE=".$swf." '> 
<EMBED src=".$swf." ' WIDTH=".$width." HEIGHT=".$height." TYPE='application/x-shockwave-flash' PLUGINSPAGE='http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash'> 
</OBJECT>";
    } }
    ?>

输出 demo.php

<?php include "classMedia.php"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<body>

<?php 
$media = new Media();
 $code = "XSGBVzeBUbk";
$media-> embedYT($code);
?>

<?php 
$media = new Media();
 $swf = "test.swf";
 $height = "360";
 $width = "480";
$media-> embedSWF($swf);
?>

</body>
</html>

Answer 1

如果$height和$width仅与embedSWF()方法相关（我怀疑这一点，因为它看起来不像Media < em> instance 但是对于embedSWF() 方法调用），您应该将它们与$swf参数一起添加：

public function embedSWF ($swf, $width = 0, $height = 0) {
    echo "<OBJECT classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' codebase='http://active.macromedia.com/flash2/cabs/swflash.cab#version=4,0,0,0' ID=objects WIDTH=460 HEIGHT=80><PARAM NAME=movie VALUE=".$swf." '><EMBED src=".$swf." ' WIDTH=".$width." HEIGHT=".$height." TYPE='application/x-shockwave-flash' PLUGINSPAGE='http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash'></OBJECT>";
}

这样称呼：

<?php 
$media = new Media();
 $swf = "test.swf";
$media-> embedSWF($swf, 480, 360);
?>

修改
通常，在表达或与当前实例（对象）的状态相关时，应该向类添加属性。如，

public class Media { private $swf; private $height; private $width; public __construct($swf, $height, $width) { $this->swf = $swf; $this->height = $height; $this->width = $width; } public getEmbedCode() { // ... } public getIframeCode() { // ... } }

在上文中，Media实例具有状态（具有维度的SWF），可以以不同格式输出。即，该方法将内部状态转换为输出。

或者，我们有一个没有状态的“类似实用程序”的类。相反，它拥有一组专门用于传递数据（参数）的方法。如，

public class Media { public embedSWF($swf, $height, $width) { // ... } public embedYT($code) { // ... } }

Answer 2

您需要将widht和height作为参数传递给您的函数，如此

$height = "360";
$width = "480";
$media-> embedSWF($swf, width, height);

然后将您的功能更改为

public function embedSWF ($swf, width, height)

并删除您在函数中启动的宽度和高度。

您的宽度和高度目前超出了对象范围。

Answer 3

更改您的embedSWF功能，分别为其添加两个参数$width和$height，如下所示：

public function embedSWF ($swf, $width = '0', $height = '0'){
    echo "<OBJECT classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' codebase='http://active.macromedia.com/flash2/cabs/swflash.cab#version=4,0,0,0' ID=objects WIDTH=460 HEIGHT=80> 
            <PARAM NAME=movie VALUE=".$swf." '> 
            <EMBED src=".$swf." ' WIDTH=".$width." HEIGHT=".$height." TYPE='application/x-shockwave-flash' PLUGINSPAGE='http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash'> 
        </OBJECT>";
}

然后，这样称呼它：

<?php 
$media = new Media();
 $swf = "test.swf";
 $height = "360";
 $width = "480";
$media-> embedSWF($swf, $width, $height);
?>

Answer 4

将$width和$height更改为对象属性，如下所示：

<?php
/*Gabriel*/
class Media {
    public $width  = 0;
    public $height = 0;

    public function embedYT($code){
        echo "<iframe width='560' height='349' src='http://www.youtube.com/embed/".$code." ' frameborder='0' allowfullscreen></iframe>";
    }

    public function embedSWF ($swf){
        echo "<OBJECT classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' codebase='http://active.macromedia.com/flash2/cabs/swflash.cab#version=4,0,0,0' ID=objects WIDTH=460 HEIGHT=80> 
<PARAM NAME=movie VALUE=".$swf." '> 
<EMBED src=".$swf." ' WIDTH=".$this->width." HEIGHT=".$this->height."     TYPE='application/x-shockwave-flash' PLUGINSPAGE='http://www.macromedia.com/shockwave    /download/index.cgi?P1_Prod_Version=ShockwaveFlash'> 
</OBJECT>";
    }
}
?>

用法：

<?php 
    $media = new Media();
    $code = "XSGBVzeBUbk";
    $media-> embedYT($code);
?>

<?php 
    $media = new Media();
    $swf = "test.swf";
    $media->height = 360;
    $media->width = 480;
    $media-> embedSWF($swf);
?>

PHP：通过包含的函数更改属性

4 个答案: