PHP

1, PHP encryption and decryptionPHP encryption and decryption functions can be used to encrypt some useful strings stored in the database, and through reversible decryption of strings, the function uses Base64 and MD5 encryption and decryption.

The days of Perl as the preferred interpreter for Linux system command line scripting are gone forever. Today, we have more choices, including Python, Ruby, and PHP. If you've already written PHP code for your site and you know the language well,

We often process data from user input or read from the database, and may have extra blanks or tabs in your string, carriage return, and so on. Storing these extra characters is a bit of a waste of space. If you want to get rid of the string start

Ability to detect most IP access through a proxy server. Beiji.com 2000.6.17 $ip = getenv ("REMOTE_ADDR"); $v = getenv ("Http_via"); $f = getenv ("Http_x_forwarded_for"); $c = getenv ("http_xroxy_connection"); $o = getenv ("Http_pragma"); print '

The procedure is as follows: $file_name = "Info_check.exe"; $file_dir = "/public/www/download/"; if (!file_exists ($file_dir. $file_name)) {//check whether the file exists echo "File not found"; Exit } else { $file = fopen ($file_dir. $file_name, "R"

{ $authcode = new Authcode (); if ($authcode->geturifilename () = = "authcode.php") { $authcode->outputimg (); } } function Chkauthcode ($Authcode) { if ($_session[' authcode '] = = $Authcode) { $rtn = true; } Else { $rtn = false; } $_session['

Matching regular expressions for Chinese characters: [U4E00-U9FA5] Match Double-byte characters (including Chinese characters): [^x00-xff] Application: Computes the length of the string (a double-byte character length meter 2,ascii character 1)

Installing Smarty is to include the Smarty class library in your own PHP project. The installation steps are as follows: (1) need to smarty official website http://www.smarty.net/download.php Download the latest stable version, all versions of the

For the apache environment, refer to the following solution.1. libmysql is missing in the system32 (C:/windows/system32) Directory of the system. dll file. The solution is to find libmysql in the php directory. dll, and libmysql. copy the dll to the

Differences between pseudo-static writing in apache + php and pseudo-static writing in iis + phpThis is the apache + php pseudo static configuration method.RewriteRule/newhouse/m-(d1_0000.html $/newhouse/model. php? Id = $1RewriteRule/newhouse/p2-(d1

1. Use regular expression to verify the date and time formatIt mainly uses php functions such as ereg and preg_match.There is a very simple, The code is as follows:Copy code $ DateTime = "00:00:00 & Prime ;;If (preg_match ("/^ d {4}-d {2}-d {2}

The following is my PHP code used to calculate the distance between two GPS longitude and latitude coordinates. If you need it, you can use it directly. The code is as follows:Copy code /*** Calculate the distance between two coordinates (meters)

Session and Cookie are used for tracking user information, such as user login verification, recording user browsing history, storing shopping cart data, and limiting user Session validity time. Today, let's take a look at how PHP operates sessions

PHPDBG aims to become a lightweight, powerful, and easy-to-use PHP debugging platform. It can be used in PHP5.4 or later versions. Php5.6 and later versions are integrated internally.Main functions:-Single-step debugging-Flexible breakpoint methods (

A: Like naming variables, you cannot use built-in function names or numbers to name functions.B: repeated calls.C: supports static elements.D: non-fixed parameters are supported.The technician is recommended to standardize functions as follows:A:

Three element operators in the php TutorialThe functions of the ternary operator are the same as those of the "if... else" flow statement. It is written in one line, and the code is refined and the execution efficiency is high. The proper use of

Ini_set ('include _ path', CAKE_CORE_INCLUDE_PATH. PATH_SEPARATOR. ROOT. DS. APP_DIR. DS. PATH_SEPARATOR. ini_get ('include _ path '));We can see that this program dynamically modifies include_path. However, cake adds CAKE_CORE_INCLUDE_PATH and

What is an array?When using PHP for development, you need to create many similar variables either early or late.Without many similar variables, you can store data as elements in an array.All elements in the array have their own IDs, so they can be

Php Tutorial string segmentation function$ Tb = "cn_loupan_news ";$ Array = explode ('news', $ tb );$ Pir = $ array [0];Echo $ pir;   // Use The explode function to split a string into an array$ Source = "hello1, hello2, hello3, hello4, hello5"; //

Function convertIp ($ ip ){$ Return = '';If (preg_match ("/^ d {1, 3}. d {1, 3}. d {1, 3}. d {1, 3} $/", $ ip )){$ Iparray = explode ('.', $ ip );If ($ iparray [0] = 10 | $ iparray [0] = 127 | ($ iparray [0] = 192 & $ iparray [1] = 168) | ($ iparray