unset function

PHP5.3 has an in-depth understanding of the garbage collection mechanism (dynamic storage allocation solution. The garbage collection mechanism is a dynamic storage allocation solution. It automatically releases allocated memory blocks that are no

This article gives a detailed summary of common magic methods in php. if you need them, you can refer to this article to sort out the common magic methods in php, the content is as follows: 1. PHP regards all methods starting with "_" as magic

This article mainly introduces how to assign values to PHP arrays. This article describes how to create arrays and how to assign values to PHP arrays in detail, hoping to help you. PHP arrays are still commonly used. so I studied the assignment of

PHP code audit documents were updated last year. they were not well written, and some were not fully written. I have referenced many documents. The owasp codereview should also be 2.0. Let's give some suggestions. Directory 1. Overview 3 2.

How to obtain PHP memory usage and php memory usage. How to obtain the PHP memory usage? the php memory gets the memory size allocated to the PHP script by the built-in function memory_get_usage (), in bytes ). In actual WEB development, how can I

Introduction to the use of foreachin_array in PHP, foreachin_array. When talking about the use of foreachin_array in PHP, foreachin_arrayphp is very efficient in development. this is understandable, but it is at the cost of execution efficiency. Php

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 (),' ';

Php's associated data usage and some tips for associating arrays, including adding, deleting, editing, traversing, exchanging keys and values, sorting, querying, and other associated array instances. Php's associated data usage and some tips for

Summary of magic methods in PHP: __construct ,__ destruct ,__ call ,__ callStatic ,__ get ,__ set ,__ isset ,__ unset ,__ sleep ,__ wakeup ,__ toString, __set_state ,__ cloneand _ autoload1, _ get, and _ set are designed for attributes not declared

Off TopicTime used to be very fast, the official version has been out long. The latest version is V1.0.8;From the initial variety of inexplicable bugs, to now slowly improve,,, use process can obviously feel!This project is still very active on

The above is the result of my own operation. That's what the manual says, don't know what to say: Reference is not what As mentioned earlier, references are not pointers. This means that the following structure does not produce the effect you expect:

1, __get, __set These two methods are designed for properties 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) when assigning a value to

PHP Array is still more commonly used, so I studied the PHP array assignment, here to take out and share with you, hope to be useful to everyone. An array is a set of variables that are stored in the computer's memory, which can be of different

If you want to delete an element from an array, you can use unset directly, but the index of the array will not be rearranged: The code is as follows:Copy code $ Arr = array ('A', 'B', 'C', 'D ');Unset ($ arr [1]);Print_r ($ arr );?>The result

Let's first look at an example: The code is as follows:Copy code $ S = str_repeat ('1', 255); // generates a string consisting of 255 1$ M = memory_get_usage (); // Get the memory occupied currentlyUnset ($ s );$ Mm = memory_get_usage (); //

From PHP 5 onwards, classes in PHP can use the Magic method. The rules that begin with two underscores (__) are preserved as magic methods, so it is recommended that you do not start with the function name unless you are trying to reload the

An associative array is a data type that is often used to describe a group of keys and their associated values. it can be said that it is the pillar of all programming languages. of course, PHP is no exception. In fact, associating arrays is very

I thought I had a very clear reference and assignment to the variable, and the result met the following question, completely subverting my understanding. Results $s output or wangchuanbo, not the same block memory address, the original

How to get PHP memory usage, PHP memory acquisition PHP built-in function memory_get_usage () can return the amount of memory currently allocated to a PHP script in bytes. These functions are very useful in web real-world development, and we can

Some of the less common problems in PHP Foreach/in_array,foreachin_array PHP is very efficient in development, which is understandable, but at the expense of execution efficiency. PHP Array function is very powerful, but also to consider more, try