unset function

The __set () method is used to set the private property value. The __get () method is used to get the private property value. The __isset () method is used to detect whether a private property value is set. The __unset () method is used to delete

PHP reference ??? PHP references allow different names to access the same variable content. It can be used on variables, functions, and objects. the usage is to add the & amp; symbol before them. The following describes the reference types and their

PHP uses unset () to delete a cell (key) in an array This article mainly introduces PHP using unset () to delete a cell (key) in the array method, an example of the unset function in the deletion of the array unit of the use of skills, the need for

Phpunset () destroys one or more variables. The unset function is a built-in function for php to destroy variables. we have introduced how to use unset to destroy static variables and global variables. at the same time, we can destroy array

Reprinted from: http://www.okajax.com/a/201106/php_unset.html The unset () function of PHP is used to clear and destroy variables. unused variables can be destroyed using unset. However, in some cases, the memory occupied by destroying variables

  1. Use extends to implement inheritance and the meanings of the overloaded and magic methods Class B extends The method in a can be absent from B during declaration. $ B = new B (); $ B-> method () in (); $ B-> attribute in a = 1; $ B-> method ()

Simple use of php destructor With the widespread development of object-oriented programming, object-oriented programming presents many interesting problems. I believe many beginners will come into contact with two functions, constructor and

Talking about the magic methods in Object-Oriented OOP in PHP, object-oriented oop 1. What is a magic method: PHP provides us with a series of functions starting with _. These functions are automatically called at the right time without manual calls.

Preface This is the first personal blog I wrote to the blog community, and I will be here to record what I have learned. Know that there are 5 months less than the time to face the dilemma of finding a job, but I still want to insist on having time

One, what is the Magic method:PHP provides us with a series of functions that begin with __, which do not need to be called manually, and are called automatically at the right time, such functions as magic functions.For example:function __construct (

The variable function of the PHP function, that is, the function can be called by the name of the variable, because the value of the variable is variable, so you can call different functions by changing a variable .For examplefunction name () {echo "

First look at the unset function syntax unset Deletes a variable. Syntax: int unset (mixed Var); return value: Integer Function type: PHP system function Content Description This function deletes the variable and returns a true value for

A Memory Overflow SolutionWhen doing statistical analysis of data, often encounter large arrays, memory overflow may occur, here to share my solution. Use examples to illustrate the problem, as follows:Assuming that the log holds 500,000 records,

PHP Code:$arr 1=array (100,200,300,400);$arr 2=array ("num" =>100, "name" => "Liuxy", "score" =>98);Print_r ($arr 1);echo "";Print_r ($arr 2);?>The output of the above code is as follows:Array ([0] => [1] => [2] => [3] => 400)Array ([num] => [name] =

Session Delete Empty is very fastidious if we can clear the specified variable, we will erase all sessions, let's take a look at some summary. The first way:unset ($_session[' xxx ']) deletes a single session,unset ($_session[' xxx ') to unregister

PHP session variable is to store the user's session information, or change the user's session settings. The session variable stores a single user's information, which can be used by all pages. PHP Session Variable When you run an application on

Shell Process Control (if structure loop structure branch structure)Controlling the execution of scriptsProcess control can be nested with each other, or they can nest themselvesJudging result execution according to condition condition---------------

The variable becomes a static variable as long as it is preceded by a keyword static. function test (){static $NM =;$NM = $nm *;Print $nm. " ";}First time execution, $nm =Test ();First time execution, $nm =Test ();First time execution, $nm =Test ()

Session management is an important part of web development, including sessions and cookie two technologies. This chapter describes the creation and use of cookies and sessions. Cookies: Cookies are often used to identify users. Cookies are small

PHP Data typePHP supports eight original types (type). 4 Kinds of scalar types:String (String), Integer (integer), float (floating-point type, also double), Boolean (Boolean)Two types of composite:Array (array), Object (objects)Two special