unset function

PHP magic method summary. Summary of magic methods in PHP: __construct ,__ destruct ,__ call ,__ callStatic ,__ get ,__ set ,__ isset ,__ unset ,__ sleep ,__ wakeup ,__ toString, __set_state ,__ cloneand _ autoload1. Summary of magic methods in PHP:

In this chapter, we will also learn some other commonly used internal functions related to arrays: count, sizeof, sort, asort, ksort, etc. if you are interested, refer to the following, I hope this chapter will help you with some common internal

In actual encoding, to view and operate the memory, many programmers first think of the PHP script memory function PHPmemory_get_usage (). below is the PHP memory_get_usage () Usage example: The code is as follows: Echo memory_get_usage (),'';

The garbage collection mechanism is a dynamic storage allocation solution that automatically releases allocated memory blocks that are no longer needed by the program. PHP also implements dynamic memory management at the language layer. the dynamic

There are eight scalar types in php, including string, integer, float, and boolean) and composite type and resource There are eight scalar types in php, including string, integer, float, and boolean) and the composite type and resource (resource),

Class Benhang extends card{/ * Constructors and constructs inherit */function __construct ($cardno, $pwd, $name, $money) { parent::__ Construct ($cardno, $pwd, $name, $money); } function Take ($money) { echo ' bank

It is very simple to delete an array element in PHP, but sometimes deleting an array requires some ordering of the index and we will use the relevant function, here we introduce the use of Unset,array_splice to delete the elements in the array of

PHP is very efficient in development, which is understandable, but at the expense of execution efficiency. PHP arrays The function is very powerful, but also need to consider more, try several situation situation, just in case, here, simply say two

Echo memory_get_usage (), ''; 313864 $tmp = str_repeat (' http://www.nowamagic.net/', 4000); Echo memory_get_usage (), ''; 406048 Unset ($TMP); Echo Memory_get_usage (); 313952 ?> Copy CodeThe

PHPSession variable usage and instance code (conversion )???? In php, Session is often used to verify user registration or verification after login. next I will summarize some common examples and usage of session variables ?? When you run an

Overloading in PHP differs from other object-oriented (C #, Java) languages, such as overloading representations in C #, with the same method name, but with different parameter lists (that is, the number of formal parameters, the type, a different

This article we mainly share with you the PHP bottom operating mechanism of the detailed, first we will share with you PHP design concept and features, PHP four layer system, etc., hope to help everyone. 1. PHP Design concept and Features

This time for you to bring PHP memory release and garbage collection using a detailed explanation, PHP memory release and garbage collection considerations, the following is the actual case, together to see. Reference assignment $a = ' Apple '; $b =

This time to everyone to bring a summary of the PHP reference Note, PHP reference notes are what, the following is the actual case, together to see. Objective I took part in a number of meetings last year, eight of which I spoke about, many times I

Php entry (string, cookie, session) Php entry (string, cookie, session). If you need it, refer. StringObtain the string length: strlen () functionObtain the text length echo mb_strlen ($ str, "UTF8 ");English string truncation $

Memory_get_usage: an example of getting the current PHP memory consumption Echo memory_get_usage (); $ Var = str_repeat ("phpzixue.cn", 10000 ); Echo memory_get_usage (); Unset ($ var ); Echo

Php two ways to delete array elements unset, array_splice usage difference $ Arr = array ('A', 'B', 'C', 'D '); Unset ($ arr [1]); Print_r ($ arr ); ?> Result: Array ([0] => a [2] => c [3] => d)

The difference between passing a value assignment in php and referencing a value assignment. Value assignment: When a value of an expression is assigned to a variable, the value of the original expression is assigned to the target variable. This

Study and analysis on the principle of static keywords in PHP. When I read the PHP manual, I found the following code: Copy the code as follows :? PhpfunctionTest () {static $ count0; $ count ++; echo $ count; if ($ count10) {Test ();} $ cou found

10 tips on PHParray operations. 1. adding element to array php is a weak language. Therefore, you do not have to declare the length for phparray as in c. The process of adding elements to it is also a process of declaration and initialization.