PHP

The similar_text () function used by PHP to look for similarity between two strings. PHP provides a rarely used similar_text function, but this function is very useful for comparing two strings and returning a percentage of similarity, the following

The htmlmeta and link generated by php are marked in the body tag, and there is a blank line at the top of the browser. 1. html generated using the smarty template in php has a blank line at the top of the browser. 2. use firedebug to find that

Common PHP code Daquan (essential for beginners) is a common basis for some development. For more information, see. 1. connect to the MYSQL database code $ Connec = mysql_connect ("localhost", "root", "root") or die ("cannot connect to the database

XML (Extensible Markup Language) is a W3C standard used for easy interaction between Web applications and servers and data storage and use. 1. XML introduction XML (Extensible Markup Language) is a W3C standard used for easy interaction between Web

In the past, PHP had to verify the data, which was generally implemented by programmers themselves through regular expressions. from PHP 5.2, the filter function in the original PCEL was moved to the built-in library, we have made a lot of

In many cases, the string truncation function is required. it is not enough because of the encoding problem between gb2312 and UTF-8, the following are the specific implementation methods and the code extracted from some mature systems. 1. Chinese

The memory lock and file lock of the Eaccelerator are used. The principle is as follows to determine whether the EAccelerator is installed in the system. if the Eaccelerator has exists, the memory lock is used. if the EAccelerator does not exist,

In the previous article, I used cookies and discuz databases to retrieve user names, user groups, user IDs, and other information, but that information is not necessarily accurate, because the auth value in the COOKIE is used for dynamic login

Php Prime (prime number) implementation code. For more information, see. The code is as follows: Class timer{Var $ time_start;Var $ time_end;Function _ construct (){$ This-> time_start = 0;$ This-> time_end = 0;}Function timer (){$ This->__

Currently, most websites using MySQL use Memcache as the key-value cache at the same time. Although such an architecture is extremely popular and there are many successful cases, it relies too much on Memcache to virtually make Memcache the root

Php learning loop structure implementation code. For more information, see. The code is as follows: /* Loop structure* 1. while loop* While (expression)*{* Loop body; // execute repeatedly until the expression is false.*}* 2. do-while loop* 3.

There is no limit on function nesting in PHP. if there is a limit, it is also a limit on memory. This is because function nesting in PHP is implemented in the form of stacks. Each function is allocated with a memory segment to store partial content

Common P4 servers generally support up to 0.1 million independent IP addresses per day. if the access traffic is larger than this, you must first configure a dedicated server with higher performance to solve the problem, check whether the server

Defines the algorithm skeleton in an operation, and delays some steps to the subclass, so that the subclass can not change the structure of an algorithm, but define some specific steps of the algorithm inheritance relationship due to its own defects,

Converts an interface of a class to another interface that the customer wants. classes that are originally incompatible and cannot work together can work together. The code is as follows: /*** Adapter mode** Convert an interface of a class to

PHP upload is also a common function of php. it mainly focuses on the client and server applications. it is much simpler than asp. I. HTML code for uploading forms The code is as follows: Note: 1. action is a new Upload 2. the enctype

In recent projects, to solve the timeout problem in big data query, you need to split big data into small data and then perform cyclic processing. I have insufficient experience and limited technology. I can only use ajax to transmit data. The use

Compare multiple cycles and move the maximum number to the top of each comparison. During each loop, find the maximum value in the remaining variables and then reduce the query range. After multiple loops, the array is sorted. The code is as

10 advanced PHP skills to improve php efficiency. 1. use an SQL injection memo formThe basic principle is never to trust the data submitted by users. Another rule is to escape the data when you send or store it ). It can be summarized as: filter

When we want to strictly limit the file type, we can simply use $ _ FILES [myFile] [type] to obtain the MIME type of the file and then check whether it is a valid type. File suffix and MIME type detectionWhen we want to strictly limit the file type,