PHP

Sometimes in the project we need to use PHP to encrypt specific information, that is, through the encryption algorithm to generate an encrypted string, the encrypted string can be decrypted by decryption algorithm to facilitate the process of

The first method:"Two-point search Requirements": 1. Sequential storage structure must be used 2. Ordered by keyword size."Advantages and Disadvantages" Binary search method has the advantage of less number of comparisons, faster search speed, good

A problem is encountered today in learning the CI framework: A PHP Error was encountered Severity:notice message:undefined Variable:user Generally in the default normal php file output an undefined declaration of a variable is not reported wrong,

The site needs to add a new constant, open the local config.php file, think about the hidef that was tested a few years ago and the APC upgrade define performance.My program has a different configuration for development, testing, production servers,

1. Use a SQL injection memoA basic principle is that you should never trust the data the user submits. Another rule is to escape (escape) when you send or store data. Can be summed up as: Filter input, Escape output (FIEO). Input filter, output

This example describes the way PHP converts date formats to XX days. Share to everyone for your reference. Specifically as follows: This code can format the time 3 days ago, 5 seconds ago, 2 years ago. Convert a date into a string "tells how

This article illustrates a simple way to implement a multi-byte string flip in PHP. Share to everyone for your reference. The implementation methods are as follows: 0) { $reversed. = mb_substring ($string, $length, 1, $encoding); return

The role of data encryption in our lives has become increasingly important, especially given the large number of transactions and data transmissions that occur on the web. For information that does not need to be restored to the original data, we

This article illustrates the method of randomly generating credit card number in PHP. Share to everyone for your reference. The specific analysis is as follows: This PHP code generated according to the credit card card number generated rules

This article describes the micro-credit platform mobile application integrated micro-credit payment function. Share to everyone for your reference. The specific analysis is as follows: The Wechatapppay file code is as follows: Copy Code code

This article describes the PHP ban on an IP or IP address section of the method of access to share for everyone to reference. The specific analysis is as follows: Because I haven't studied Apache and Nginx, I've written a small program that can

Solutions under Windows: Check to see if the directory exists or if the directory has write permissions for everyone or authenticated users by looking for a path to PHP.ini's Session.save_path = "". It's generally okay. Solutions for

This example describes how PHP gets the start and end dates for each week of the year. Share to everyone for your reference. The specific analysis is as follows: Recent projects need to do a weekly reporting function, you need to know the start

One, no matter what the program, function name () {}, for () {}, .... Too much, do not say also know what to do with. Two, $str {4} After the string's variable followed by {} braces and brackets are all treating a string variable as an array. Three,

Notice:use of undefined constant all_ps-assumed ' all_ps ' in E:\Server\vhosts\www.lvtao.net\global.php on line 50 notice:undefined Index:easetemplatever in E:\Server\vhosts\www.lvtao.net\libs\template.core.php on line 51 Notice:use of undefined

Copy Code code as follows: Date_default_timezone_set (' Asia/hong_kong '); Set time zone Set_error_handler ("MyHandler"); Set Error Handler $chinatime = Date (' y-m-d h:i:s '); Get current time $max _size = 500000; Try { $content =

However, when you use a database that is on a different computer than the WEB server, caching a database result set is usually a good idea. However, determining the best caching strategy based on your situation is a challenge. For example, for

Assignment and replication of objects: assignment: Overloading by the "=" operator User A (a), B; b = A; Replication: Calling a copy constructor User b; User A (b); Or User A = b;//is equivalent to User A (b); Unlike assignment, the assignment is to

We often see some websites that show you the type of browser you are using and the language you are using, for example, the browser you are using is IE6 and traditional. It doesn't look very flashy. In fact, such a function is not difficult to

Ob_flush/flush in the manual description, are refreshing output buffer, and also need to support the use, so will lead to a lot of people confused ... In fact, they are different objects of operation, in some cases, flush do not do anything at all.