PHP

I am going to learn about php. I found that many functions are needed and can be written by myself, which is troublesome. So I found common php functions and obtained them from various major php systems, it is definitely a practical php

I. Differences between public, private, and protectedPublic: the permission is the largest, and can be called internally or by instances.Protected: protected type, used for calls of this class and inheritance class.Private: private type, which is

Magic constant:1. _ LINE __Returns the current row number in the file.2. _ FILE __Returns the complete file path and file name. If it is used in a include file, the include file name is returned. From PHP4.0.2, __file _ always contains an absolute

PHP handles case-sensitive issues in disorder and may occasionally encounter issues when writing code. So here is a summary.However, I do not encourage you to use these rules. We recommend that you always adhere to the "Case sensitivity" and follow

First, clarify the PHP output sequence1. Open the php output cache: echo, print-> php output_buffring-> server buffering-> browser display2. php output cache not enabled: echo, print-> server buffering-> browser displayIn addition, it is clear that

Copy codeThe Code is as follows:Require_once "./include/zip. php ";$ Zip = new PHPZip ();// $ Zip-> createZip ("directory address of the folder to be compressed", "file name .zip"); // only generate files that are not automatically downloaded$ Zip->

Php Verification CodeCaptcha. class. phpCopy codeThe Code is as follows:Class Captcha{Private $ width;Private $ height;Private $ codeNum;Private $ code;Private $ im;Function _ construct ($ width = 80, $ height = 20, $ codeNum = 4){$ This-> width = $

I. Introduction UTF-8 is a Unicode character encoding method that is often used in web applications. The advantage of using UTF-8 is that it is a variable length encoding method, the length of the ANSII code is 1 byte. In this way, network bandwidth

Copy codeThe Code is as follows:$ Num = 1220.01;Echo fmoney ($ num); // result: 1,220.21Echo umoney ($ num );// Result: one thousand and two hundred twenty dollars and twenty-ONE CENTS ONLYEcho umoney ($ num, "RMB ");// Result: one thousand and two

1. character location search function:Strpos ($ str, search, [int]): searches for the first position of search in $ str starting from int;Stripos ($ str, search, [int]): the position where the string first appears in another string. This function is

Next, let's take you on the road to getting started with PHP.Note:I am currently using Apache web server and my SQL as WEB server and database, in the php-4.3.3 environment to do the program. Of course, it is essential to simply build and access the

5. How to instantiate an object As we have mentioned above, the Unit of the object-oriented program is the object, but the object is instantiated through the class, sinceOur class will be declared, and the next step is to instantiate the

1. Establish a database connection Copy codeThe Code is as follows:$ Mysqli = new mysqli ("localhost", "root", "", "mydb ");?> To establish a database connection, four parameters are required: Database address, database access username, database

Because pharmar uses Mcafee antivirus software and requires all programs to be installed in Program Files, these Files are stored in D: \ Program Files for ease of management. Good luck when Mcafee writes protection rules.Installation and

Author: Wenlong Wu1. for ms SQL SERVER databasesThere are two solutions:Modify php. ini to achieve this: Open php. ini and you can see two options: mssql. textsize and mssql. textlimit:; Valid range 0-2147483647. Default = 4096.; Mssql. textlimit = 4

The interview questions collected from the Internet are said to be Yahoo.1. Which of the following will not add john to the users array?1. $ users [] = 'john ';2. array_add ($ users, 'john'); // wrong3. array_push ($ users, 'john ');4. $ users | =

Copy codeThe Code is as follows:/*When ftp_nlist () is used for correspondence, two types of returned array values are available:A: separate file namesB: The file name that contains the directory.If you use this function, make sure to change it here.

Procedure 1: extract data randomly from the dictionary and write a new file. (1.php)Copy codeThe Code is as follows:/* Extract random values from dictionary files */$ File1 = "./Words. dic ";$ File2 = "./common_pass_mini.dic ";$ File3 = "./Sys_Month_

There is not much technical content here. I just talked about it in a simple way. (The following operations are based on PHP + MySQL + Apache.) How can we implement php code security when various hackers are rampant, ensuring the security of

$ Act = $ _ POST ['ac'];The above code always promptsNotice: Undefined index: act in F: \ windsflybook \ post. php on line 18In additionReference contentNotice: Undefined variable: Submit ......And so on.Cause: the variable is undefined.Solution:1)