PHP Self-Destruct program (use caution), PHP self-destruct program with caution
This article describes the PHP self-destruct program. Share to everyone for your reference. The implementation method is as follows:
$fileDelete succeeded."; }else{echo "File$fileDelete failed!"; }}} if (@rmdir ($dir)) {echo ' directory$dirThe deletion was successful.\ n "; }else{ech
This article mainly introduces the sequence of execution of _ destruct and register_shutdown_function in php. for details, refer to the php Manual.
_ Destruct is
The Destructor is executed when all references to an object are deleted or when the object is explicitly destroyed.
WhileRegister_shutdown_functionYes
Registers a callback to be executed after script execution finishes or exit () is called. Regist
_ Destruct and register_shutdown_function execution sequence problem, destruct. _ Destruct and register_shutdown_function are executed sequentially. destruct is resolved according to the php Manual. _ Destruct indicates that the destructor will be deleted from all references
article.
Finally, we use a hash_destruct function to obtain whether there is a destructor of this type.Template Inline auto has_destruct (const T )-> decltype (static_cast {Return static_cast }
Template Inline auto has_destruct (T *)-> decltype (static_cast {Static_assert (false, "Please use const T not T *");Return static_cast }
Template Inline auto has_destruct (const T *)-> decltype (static_cast {Static_assert (false, "Please use const T not const T *");Return static_cast } I have to menti
In php, _ destruct and register_shutdown_function are executed sequentially. The sequence of execution of _ destruct and register_shutdown_function in php is analyzed according to the php Manual. _ Destruct is the sequence in which the destructor will be deleted from all references to an object or when _ destruct and r
Sequential execution of _ destruct and register_shutdown_function in php
According to the php manual.
_ Destruct is
The Destructor is executed when all references to an object are deleted or when the object is explicitly destroyed.
While register_shutdown_function is
Registers a callback to be executed after script execution finishes or exit () is called. Register a callback function that is executed after
Php magic function learning and application _ construct () _ destruct () _ get () and so on (1) the first magic method Php5.0 has provided us with a lot of object-oriented since its release? Especially, it provides us with a lot of easy-to-use magic methods. these magic methods can simplify my Php magic function learning and application _ construct () _ destruct () _ get () and so on
(1) first knowledge
This article mainly introduces the sequence of execution of _ destruct and register_shutdown_function in php. for details, refer to the php Manual.
_ Destruct is
The Destructor is executed when all references to an object are deleted or when the object is explicitly destroyed.
WhileRegister_shutdown_functionYes
Registers a callback to be executed after script execution finishes or exit () is called. Regist
Construction (construct) and destructor (destruct) Order of virtual inheritance (virtual inheritance)
In multiple inheritance, the constructor order is virtual inheritance in order, and again, in order, from the base class to the derived class; The deconstruction order is just the opposite;
The code is as follows:
* * * cppprimer.cpp * * Created on:2014.1.10 * author:spike//*eclipse CDT, gcc 4.8.1*/ #include
Output:
Zooanimal constructor!
To
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According to the PHP manual.
_ Destruct is
The Destructor is executed when all references to an object are deleted or when the object is explicitly destroyed.
While register_shutdown_function is
RegisterscallbackTo be executed after script execution finishes or exit () is called. registers a callback function that is executed when the script is run or exit () is called.
Literally speaking, __d
confirm the address).2. Reset () method, this method needs to suspend the countdown thread first, mainly to prevent simultaneous access to the same memory situation occurs:void Client::reset (void) { SuspendThread (count_thread_handle); = M_max_life; ResumeThread (Count_thread_handle);}3. Why is the Countdownentry () method static? Very simple, we need to use it in the constructor to initialize the countdown thread, and its implementation is very simple, we pass the this pointer to th
: This article mainly introduces the PHP magic method __construct _ destruct. if you are interested in the PHP Tutorial, refer to it. In versions later than php5, classes can use magic methods. Php requires that all methods starting with two underscores (_) are retained as magic methods. Therefore, we recommend that you do not use the _ open header for function names unless you want to reload the existing magic methods.
Currently, php's existing magi
Summary of magic methods in PHP: __construct, _ destruct, _ call, _ callstatic, __get, _ set, _ isset, _ unset, _ sleep, _ wakeup, _ tostring, _ set_state, _ clone and _ autoload
1. _ Get, _ setThese two methods are designed for attributes that are not declared in the class and their parent class._ Get ($ property) access this method when an undefined property is called_ Set ($ property, $ value) is called when an undefined property is assigned a va
the object is called (that is, the attribute with no access permission ).
3. _ call
_ Call ($ method, $ arg_array) this method is called when an undefined method is called.
The undefined method here includes methods with no access permission.
4. _ autoload
_ Autoload function, which is automatically called when trying to use a class that has not been defined. By calling this function, the script engine has the last chance to load the required class before a PHP error fails.
Note: The Exception
This article describes the PHP self-destruct program. Share to everyone for your reference. The implementation method is as follows:
// +----------------------------------------------------------------------
// | kill!!
// | The program will erase all files and directories in this directory
// | If you set up database information, try to delete all database and table data (provided the permissions are sufficient
//+----------------------------------------------------------------------//| kill!!//| The program will erase all files and directories in this directory//| If you set up database information, try to delete all database and table data (provided you have enough permissions!). )//+----------------------------------------------------------------------//| Version: $Id $//+----------------------------------------------------------------------//----------The database configuration area----------------
This example describes the PHP self-destruct program. Share to everyone for your reference. The implementation method is as follows:
I hope this article will help you with your PHP programming.
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Design and Manufacturing Process Analysis of iPhone 4 to iPhone 6, iPhone 4iphone6
Here I will explain some of my views on the design and manufacturing processes of these mobile phones.
These five models have three appearances:
Sandwich Design for iPhone 4.
Three-Stage aluminum alloy Integrated forming of
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