array

Introduction in PHP has several predefined interfaces, but also useful     iteratoraggregate (aggregated aggregate iterator iterator) Iteratoraggregate extends traversable {Abstract public traversable getiterator (void)} This interface implements a

Use two for loops to implement an infinite class classification Table: Field name field Type Notes Default Value Id Int Primary KEY Auto-increment Name varchar Category

Want to build a chat app, or even a game? Then, the socket server will be your first step. Once you understand the basics of creating a server, subsequent optimization steps will be just as simple. The socket server works in such a way that it runs

This sesison to the database is very simple, is based on the session_id of the database crud operations, mainly used, Session_set_save_handler this method, custom session execution method, First create the data table CREATE TABLE ' Sessions ' (

PHP socket processing does not come over the data flow, how to deal with (as if it is blocked) Requirements: PHP accepts a hardware to send data to 8888 port, if received, should socket_send function return

Array creation, initializing '老大','2'=>'老三','1'=>'老二'); if( isset($arr3) ) {print_r($arr3);} ?>Using the value of an array Print data for a group //直接通过index访问 ';

-->1, b=>1, c=>1, d=>1); foreach ($array as $key => $value) {if ($key = = B) {$array [A] = change; $array [D] = change; Print_r ($array); Echo '; //If you want to print chnage, you can use//if ($array [$key] = = ' change '

1. __get/__set: Takeover of object properties2, __call/__callstatic: Control the use of Php object method3. __tostring: Convert PHP objects to strings4, __invoke: A PHP object as a function to the implementation of the method back and forth class

When it comes to long links, you must be familiar with the continuous data interaction with a link, unlike those one-night stand-by services that require frequent opening and closing links, low efficiency and increased complexity of the business. In

1. isset function: Determine whether the variable is initialized Description: It does not determine whether the variable is empty and can be used to determine whether the elements in the array have been defined Note: When using isset to determine

/* * Title: foreach Output two-dimensional array * Function: foreach () * Date Created: May 16, 2015 * Precautions: */ Output one-dimensional array $array 1 = array (); $array 1[0] = ' chu Liu Xiang '; $array 1[1] = ' hu iron flower ';

Now that we know how to access a member of an object, accessed by the "Object-> member," which is the form of accessing a member of an object outside of the object, if I want the method inside the object to access the properties of this object, Or

Now it seems quite popular to discuss Constellation, the following author shares a function that uses PHP to determine which constellation a date belongs to. The specific function code is as follows: function constellation ($month, $day)

In PHP, the quickest way to read a file is to use functions such as file and file_get_contents, and a few lines of code can be pretty good at accomplishing the functions we need. However, when the file being manipulated is a larger file, these

If you want to delete an element in an array, you can use the unset directly, but the index of the array does not rearrange: The result: Array ([0] => a [2] => C [3] => D) So how do you get the missing elements to be filled and the array will

Definitions and usage The Array_map () function returns an array of the actions of the user's custom function. The number of arguments accepted by the callback function should be the same as the number of arrays passed to the Array_map () function.

Definitions and usage The Array_walk () function applies a callback function to each element in the array. Returns TRUE if successful, otherwise returns FALSE. Typically, a function accepts two parameters. the value of the array parameter is the

(1) method of the PHP object to the array (object to array): /** * Object turn array /function Object_to_array ($obj) { $_arr=is_object ($obj)? Get_object_vars ($obj ): $obj; foreach ($_arr as $key => $val) { $val = (Is_array ($val))

In the process of web development, when we need to pass in the URL of the Chinese character or other special characters such as HTML, it always seems to encounter a variety of small problems, because different browsers for their coding is not the

Share a common PHP paging class. There are three kinds of manifestation, the concrete effect chart is as follows: (1) (2) (3) The specific code for the page class of PHP and how to use it are as follows: /** *php Paging class * *show (2)