PHP

Seventh chapter (14) Application of object-oriented detailed _ polymorphismPolymorphic applications: Object class objects are copied to a reference to the parent class, and then the method of the parent class is invoked, but the method that executes

The seventh chapter (11) Object-oriented detailed object serialization and dragSerialization is the conversion of an object into a binary string (the name of the object to be serialized).Drag is the binary word into Object unserilize (to drag the

1, about PHP redirection Code fragmentMethod One: Header ("Location:index.php");Method Two: echo "";Method Three: Echo "";2. Get Visitor BrowserCode fragmentfunction Browse_infor (){$browser = ""; $browserver = "";$Browsers =array ("Lynx", "MOSAIC",

Array: arrayOffset: specifies the start position of the retrieved element. If it is a positive number, it is taken from the beginning to the end. If it is a negative value, it is taken from the back to the absolute value of the offset.I. PHP

PHP's processing of arrays can be called one of the most attractive features of the language. It supports more than 70 array-related functions. Whether you want to flip an array, determine whether a value exists in the array, convert the array into

The most commonly used php function strip_tags The code is as follows:Copy code $ Mystr = Dozens of lines of HTML code are omitted here.SATO;$ Str = strip_tags ($ mystr );// Here, I have converted my HTML to TXT text. Haha, this function is

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Currently, there is not much free php space in China, and a lot of domestic space is html or asp. Below is a free space outside China.Athost.net free 50 m/500 m/php/mysql/ftp/subdomain/domain spaceCategory: PHP space popularity: 6 Source: Network

UsageSprintf (format, arg1, arg2, arg ++)DescriptionThe format parameter is the conversion format. It starts with the percent sign ("%") and ends with the conversion character. The following possible format values:• %-Return percent sign• % B-binary

The code is as follows:Copy code $ Arr = array (1, 2, 4 );Unset ($ arr [1]);Echo $ array [1]; // error Undefined offsetPrint_r ($ arr );// The output is as follows:/**Array([0] => 1[2] => 3[3] => 4)**/$ Arr = array_values ($ arr );Print_r ($ arr )

Date function usage The code is as follows:Copy code Date ($ t ); The format is as follows:Format: year-month-day hour: minute: SecondRelated time parameters:A-"am" or "pm"A-"AM" or "PM"D-a few days, two digits. If there are less than two

I have been very busy recently. I have encountered a manual activity and need to download some remote images. There are more than one hundred images in total. If I save them manually, it will take too much time, so I Googled the Internet, find the

First, let's take a look at the instructions on deleting cookies in the php Manual.Bool setcookie (string name [, string value [, int expire [, string path [, string domain [, bool secure])To delete a cookie, you must ensure that its expiration time

I. Differences between $ arr ['key'] and $ arr ["key"] and $ arr [key:The above three methods mainly access the array value through the string type array subscript, that is, the array key. If the array subscript is an index type, that is, the key

Look at a simple recursive instanceExample 1 The code is as follows:Copy code Function demo ($ ){Static $ sum = 1;If ($ a> 1 ){$ Sum * = $;Demo (-- $ );} Else {$ A = $ sum;        } Return $ sum;}   Echo demo (10 ); Example 2Traverse

This section describes how to use Crontab in Linux. For more information about how to use crontab, see: Linux scheduled task crontab.1. Use PHP to execute scripts in CrontabJust like calling a common shell script in Crontab (specific Crontab usage),

When the parameter name is known, it is easy to obtain the parameter value using a regular expression. The js implementation method is as follows: The code is as follows:Copy code Function getValue (url, name ){Var reg = new RegExp ('(\? | &) '+

Method 1: Using fopen and fwirte functions1. How to open a file in PHPUse the PHP function fopen () to open a file. fopen () usually uses two parameters to indicate the path and file mode for opening the file. For example: The code is as

When you run an application, you open it, make some changes, and then close it. This is like a session. The computer knows who you are. It knows when to start the application and when to terminate it. However, there is a problem on the Internet: the

Symptom: zend studio xdebug 57% waiting for xdebug sessionThe development environment of the author is usually a windows host machine + vmare Linux virtual machine. The linux samba function shares the directories under the virtual machine to windows