由于公司需要php方面的项目开发,php刚刚入门,在写按钮提交过程中,asp.net里的按钮事件更好些。先看下面的代码,
require_once '../inc/EventHelper.php';
function Page_Load()
{
echo '在任何时候都会运行
';
if(!Page::IsPostBack())
{
echo '加载产品分类
';
if($_GET['cmd']=='edit')
{
echo '修改加载需要修改的产品信息
';
}
}
}
function bAdd_Click()
{
//Comm::CheckQX('产品管理_添加');
echo "bAdd_Click
";
}
function bEdit_Click()
{
//Comm::CheckQX('产品管理_修改');
echo 'proID='.$_GET['proID'].'
';
echo "bEdit_Click
";
}
function sdfsdfdsf_Click()
{
echo "e44444444444444444444
";
}
?>
做过asp.net开发的对上面的代码应该有点熟悉,如:Page_Load,Page.IsPostback,bAdd_Click,这些很像asp.net的事件。
以上代码在点击【添加】按钮时运行bAdd_Click函数(暂且这么叫,function好像是函数的意思),同样的,点击【修改】按钮自动运行bEdit_Click事件。不需要过多的参数变化,也不需要过多的文件,若页面功能不是很复杂的情况下,用这种模式可以快速开发。
下面来看看EventHelper.php这个文件的代码:
class Page
{
//是否回发数据,1:是
public static function IsPostBack()
{
global $SYSRunEventName;
return !empty($SYSRunEventName);
}
//加载并执行事件
function EventLoad()
{
global $SYSRunEventName;
$arrEvent=get_defined_functions();
$arrEventUser=$arrEvent['user'];
$arr=array_keys($_POST);
foreach($arr as $row)
{
$name=strtolower($row);
foreach($arrEventUser as $row1)
{
$name1=str_ireplace('_click','',$row1);
if($name==$name1)
{
$SYSRunEventName=$row1;
break;
}
}
if(!empty($SYSRunEventName))
{
break;
}
}
if(function_exists('Page_Load'))
Page_Load();
$SYSRunEventRunName=strtolower($SYSRunEventName);
if(Page::IsPostBack())
{
$SYSRunEventName();
}
}
}
class Comm
{
public static function GetParam($params=array(),$cmd='addoverride')
{
$allParam=array();
if($cmd=='addoverride')
{
$arrKeys=array_keys($params);
foreach($arrKeys as $row)
{
if(!in_array($row,array_keys($allParam)))
$allParam[$row]=$params[$row];
}
}
else if($cmd=='del')
{
foreach($params as $row)
{
unset($_GET[$row]);
}
}
$arrKeys=array_keys($_GET);
foreach($arrKeys as $row)
{
if(!in_array($row,array_keys($allParam)))
$allParam[$row]=$_GET[$row];
}
$p='';
$arrKeys=array_keys($allParam);
foreach($arrKeys as $row)
{
$p.=$row.'='.$allParam[$row].'&';
}
return rtrim($p,'&');
}
}
Page::EventLoad();
?>
以上功能大家可以测试下,在我php5.4可以运行成功,不过在安全性方面还没考虑过多,看过一些文章php会有可能通过客户端执行php代码,因为php很许多实用的功能特性。
关于Comm::GetParam,由于经常需要获取get方式的参数,或修改参数,如分页时需要保留所有url参数,只修改分页参数(如page=5),所以就自行写了一些代码。
主要利用php以下几个特点:
function_exists
get_defined_functions
以及利用常用的表单提交原理,利用submit提交原理 实现功能的。
由于时间仓促,来不及说明具体原理,还请见谅,代码大家都可以看懂的。

Calculating the total number of elements in a PHP multidimensional array can be done using recursive or iterative methods. 1. The recursive method counts by traversing the array and recursively processing nested arrays. 2. The iterative method uses the stack to simulate recursion to avoid depth problems. 3. The array_walk_recursive function can also be implemented, but it requires manual counting.

In PHP, the characteristic of a do-while loop is to ensure that the loop body is executed at least once, and then decide whether to continue the loop based on the conditions. 1) It executes the loop body before conditional checking, suitable for scenarios where operations need to be performed at least once, such as user input verification and menu systems. 2) However, the syntax of the do-while loop can cause confusion among newbies and may add unnecessary performance overhead.

Efficient hashing strings in PHP can use the following methods: 1. Use the md5 function for fast hashing, but is not suitable for password storage. 2. Use the sha256 function to improve security. 3. Use the password_hash function to process passwords to provide the highest security and convenience.

Implementing an array sliding window in PHP can be done by functions slideWindow and slideWindowAverage. 1. Use the slideWindow function to split an array into a fixed-size subarray. 2. Use the slideWindowAverage function to calculate the average value in each window. 3. For real-time data streams, asynchronous processing and outlier detection can be used using ReactPHP.

The __clone method in PHP is used to perform custom operations when object cloning. When cloning an object using the clone keyword, if the object has a __clone method, the method will be automatically called, allowing customized processing during the cloning process, such as resetting the reference type attribute to ensure the independence of the cloned object.

In PHP, goto statements are used to unconditionally jump to specific tags in the program. 1) It can simplify the processing of complex nested loops or conditional statements, but 2) Using goto may make the code difficult to understand and maintain, and 3) It is recommended to give priority to the use of structured control statements. Overall, goto should be used with caution and best practices are followed to ensure the readability and maintainability of the code.

In PHP, data statistics can be achieved by using built-in functions, custom functions, and third-party libraries. 1) Use built-in functions such as array_sum() and count() to perform basic statistics. 2) Write custom functions to calculate complex statistics such as medians. 3) Use the PHP-ML library to perform advanced statistical analysis. Through these methods, data statistics can be performed efficiently.

Yes, anonymous functions in PHP refer to functions without names. They can be passed as parameters to other functions and as return values of functions, making the code more flexible and efficient. When using anonymous functions, you need to pay attention to scope and performance issues.


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