Php 这三个功能是如何协同工作的?
我正在阅读一本php书籍,但不了解一些函数 具体来说,公共功能显示菜单($按钮)。我知道这会为菜单(主页、联系人等)创建一个表格,并将它们隔开。这里的参数是什么Php 这三个功能是如何协同工作的?,php,Php,我正在阅读一本php书籍,但不了解一些函数 具体来说,公共功能显示菜单($按钮)。我知道这会为菜单(主页、联系人等)创建一个表格,并将它们隔开。这里的参数是什么 public function DisplayButton($width, $name, $url, $active = true) $width = 100/count($buttons); Here is what I am not understanding. Im setting a variable called
public function DisplayButton($width, $name, $url, $active = true)
$width = 100/count($buttons);
Here is what I am not understanding. Im setting a variable called width to be 100/count ? lets say buttons are 4 so 100/4 25? What is the point of the 25? Also,
$this -> DisplayButton($width, $name, $url, !$this->IsURLCurrentPage($url));
我知道他们在屏幕上制作什么,但不了解这些功能的关键部分。有人能发出一点点光吗
//声明的变量
public $content;
public $title = 'TLA Consulting Pty Ltd';
public $keywords = 'TLA Consulting, Three Letter Abbreviation,
some of my best friends are search engines';
public $buttons = array( 'Home' => 'home.php',
'Contact' => 'contact.php',
'Services' => 'services.php',
'Site Map' => 'map.php'
);
// class Page's operations
public function __set($name, $value)
{
$this->$name = $value;
}
public function DisplayMenu($buttons)
{
echo "<table width='100%' bgcolor='red' cellpadding='3'
cellspacing='4'\n";
echo " <tr>\n";
$width = 100/count($buttons);
while (list($name, $url) = each($buttons))
{
$this -> DisplayButton($width, $name, $url, !$this->IsURLCurrentPage($url));
}
echo " </tr>\n";
echo "</table>\n";
}
{
if ($active)
{
echo "<td width ='$width%'>
<a href ='$url'>
<img src ='s-logo' alt ='$name' border ='0' /></a>
<a href ='$url'><span class='menu'>$name</span></a></td>";
}
else
{
echo "<td width ='$width%'>
<img src ='side-logo.gif'>
<span class='test'>$name</span></td>";
}
}
public function IsURLCurrentPage($url)
//#determines weather a url for the button points to the current page.
// #the server[php_self,$url] returns a number if the string in $url is inside the superglobal variable $_server[pph]
{
if(strpos($_SERVER['PHP_SELF'], $url )==false)
{
return false;
}
else
{
return true;
}
}
public function DisplayButton($width, $name, $url, $active = true)
//outputs a single menu button if button is to point to the page to are on, you display an inactive button
#I think width just gives the table cell a % value. $name involves a setter function declared up top? ,
{
if ($active)
{
echo "<td width ='$width%'>
<a href ='$url'>
<img src ='s-logo' alt ='$name' border ='0' /></a>
<a href ='$url'><span class='menu'>$name</span></a></td>";
}
else
{
echo "<td width ='$width%'>
<img src ='side-logo.gif'>
<span class='test'>$name</span></td>";
}
}
public$content;
公共$title=‘TLA咨询私人有限公司’;
public$keywords='TLA Consulting,三个字母缩写,
我的一些好朋友是搜索引擎;
public$buttons=数组('Home'=>'Home.php',
'Contact'=>'Contact.php',
'Services'=>'Services.php',
“站点地图”=>“Map.php”
);
//类页面的操作
公共函数集($name,$value)
{
$this->$name=$value;
}
公共功能显示菜单($按钮)
{
echo“这可能缺少类
声明,但我们继续
下面是声明类属性的位置
public $content;
public $title = 'TLA Consulting Pty Ltd';
public $keywords = 'TLA Consulting, Three Letter Abbreviation,
some of my best friends are search engines';
public $buttons = array( 'Home' => 'home.php',
'Contact' => 'contact.php',
'Services' => 'services.php',
'Site Map' => 'map.php'
);
\uuu set()
是PHP中的一个神奇方法。您可以稍后检查所有这些方法。我们将重点讨论\uu set()
。这意味着每次在对象中设置属性时,它都会定义和设置此属性,即使您尚未在类中声明它
// class Page's operations
public function __set($name, $value)
{
$this->$name = $value;
}
接下来,我们有DisplayMenu
,它在屏幕上呈现菜单。$width
表示每个按钮的宽度。因此,如果在$buttons
中有4个按钮,它将分割空间,在这种情况下,空间是100%,因此,每个按钮的空间占25%
public function DisplayMenu($buttons)
{
echo "<table width='100%' bgcolor='red' cellpadding='3'
cellspacing='4'\n";
echo " <tr>\n";
$width = 100/count($buttons);
while (list($name, $url) = each($buttons))
{
// This will render the button on screen.
// Params:
// 1 The width of the button.
// 2 The name of the button.
// 3 The url the button points to.
// 4 Checks if the button url is the same url of the current page.
$this->DisplayButton($width, $name, $url, !$this->IsURLCurrentPage($url));
}
echo " </tr>\n";
echo "</table>\n";
}
最后,DisplayButton
将呈现实际的按钮。每个按钮都单独呈现
public function DisplayButton($width, $name, $url, $active = true)
{
// This will, in practice verify for you if
// the current page is the same of the button the user clicked.
// If it is, it will display the button without the link for that
// button, or with a disabled link.
// You'll notice it will show differently. Maybe
// also with some different color or style according to the CSS class.
// Remember that $active is the result of the IsURLCurrentPage().
if ($active)
{
echo "<td width ='$width%'>
<a href ='$url'>
<img src ='s-logo' alt ='$name' border ='0' /></a>
<a href ='$url'><span class='menu'>$name</span></a></td>";
}
else
{
echo "<td width ='$width%'>
<img src ='side-logo.gif'>
<span class='test'>$name</span></td>";
}
}
公共函数显示按钮($width、$name、$url、$active=true)
{
//这将在实践中为您验证
//当前页面与用户单击的按钮相同。
//如果是,它将显示没有该链接的按钮
//按钮,或带有禁用的链接。
//你会注意到它的表现会有所不同。也许吧
//也可以根据CSS类使用不同的颜色或样式。
//请记住,$active是IsURLCurrentPage()的结果。
如果($active)
{
回声“
";
}
其他的
{
回声“
$name”;
}
}
这可能缺少类的声明,但我们继续
下面是声明类属性的位置
public $content;
public $title = 'TLA Consulting Pty Ltd';
public $keywords = 'TLA Consulting, Three Letter Abbreviation,
some of my best friends are search engines';
public $buttons = array( 'Home' => 'home.php',
'Contact' => 'contact.php',
'Services' => 'services.php',
'Site Map' => 'map.php'
);
\uuu set()
是PHP中的一个神奇方法。您可以稍后检查所有这些方法。我们将重点讨论\uu set()
。这意味着每次在对象中设置属性时,它都会定义和设置此属性,即使您尚未在类中声明它
// class Page's operations
public function __set($name, $value)
{
$this->$name = $value;
}
接下来,我们有DisplayMenu
,它在屏幕上呈现菜单。$width
表示每个按钮的宽度。因此,如果在$buttons
中有4个按钮,它将分割空间,在这种情况下,空间是100%,因此,每个按钮的空间占25%
public function DisplayMenu($buttons)
{
echo "<table width='100%' bgcolor='red' cellpadding='3'
cellspacing='4'\n";
echo " <tr>\n";
$width = 100/count($buttons);
while (list($name, $url) = each($buttons))
{
// This will render the button on screen.
// Params:
// 1 The width of the button.
// 2 The name of the button.
// 3 The url the button points to.
// 4 Checks if the button url is the same url of the current page.
$this->DisplayButton($width, $name, $url, !$this->IsURLCurrentPage($url));
}
echo " </tr>\n";
echo "</table>\n";
}
最后,DisplayButton
将呈现实际的按钮。每个按钮都单独呈现
public function DisplayButton($width, $name, $url, $active = true)
{
// This will, in practice verify for you if
// the current page is the same of the button the user clicked.
// If it is, it will display the button without the link for that
// button, or with a disabled link.
// You'll notice it will show differently. Maybe
// also with some different color or style according to the CSS class.
// Remember that $active is the result of the IsURLCurrentPage().
if ($active)
{
echo "<td width ='$width%'>
<a href ='$url'>
<img src ='s-logo' alt ='$name' border ='0' /></a>
<a href ='$url'><span class='menu'>$name</span></a></td>";
}
else
{
echo "<td width ='$width%'>
<img src ='side-logo.gif'>
<span class='test'>$name</span></td>";
}
}
公共函数显示按钮($width、$name、$url、$active=true)
{
//这将在实践中为您验证
//当前页面与用户单击的按钮相同。
//如果是,它将显示没有该链接的按钮
//按钮,或带有禁用的链接。
//你会注意到它的表现会有所不同。也许吧
//也可以根据CSS类使用不同的颜色或样式。
//请记住,$active是IsURLCurrentPage()的结果。
如果($active)
{
回声“
";
}
其他的
{
回声“
$name”;
}
}
它根据按钮的数量以%为单位设置表格单元格的宽度。因此,如果您有4个按钮,则一行中的每个单元格的宽度将为25%。噢,多谢您对$this->DisplayButton($width,$name,$url,!$this->IsURLCurrentPage($url))的内容有何了解;实际上是这样吗?它创建一个$width
%宽的表格单元格和一个带有图像的“按钮”。如果找不到图像,图像将显示$name
文本,并且$name
也将在“按钮”中显示为文本。带有的“按钮”具有指向$url
和!$this->IsURLCurrentPage($url)的链接
意味着有当前页面链接的按钮将没有链接,或者只是意味着有当前页面链接的按钮将被禁用。它根据按钮的数量以%为单位设置表格单元格宽度。因此,如果您有4个按钮,一行中的每个单元格都将有25%的宽度。噢,多谢了,知道$this->Display是什么吗按钮($width、$name、$url、!$this->IsURLCurrentPage($url));实际上是这样吗?它创建一个$width
%宽的表格单元格和一个带有图像的“按钮”。如果找不到图像,图像将显示$name
文本,并且$name
也将在“按钮”中显示为文本。带有的“按钮”具有指向$url
和!$this->IsURLCurrentPage($url)的链接
意味着有当前页面链接的按钮将没有链接,或者只是意味着有当前页面链接的按钮将被禁用。谢谢我爱你,也是因为我是当前的,这也是允许我显示我的页面的原因吗?比如,如果我创建了一个名为contact.php的新文件,这是允许联系人可点击和o是否转到新页面?isURLCurrentPage
将检查用户所在的当前页面是否与正在呈现的按钮所在的页面相同。如果为真,则将禁用按钮。如果不是同一页面,则将使按钮可单击,使您能够转到另一页面