PHP

PHP code used to obtain information about your browser and operating system. 1. when a user accesses the SERVER, use the PHP Super global variable $ _ SERVER array field [HTTP_USER_AGENT] to obtain all information about the user. The $ _ SERVER

Use crypt () in PHP to implement user authentication code. To understand crypt (), anyone who has experience using non-Windows platforms may be quite familiar with crypt (). This function is called one-way encryption and can encrypt some clear codes,

Use the array_filter () function in php to remove multi-dimensional null code sharing. In fact, we can use the array_filter function to easily remove multi-dimensional null values without changing the subscript of the array. The following is an

Code sharing for php cutting page div content. Highlights: 1. you can also use php to cut the page div. We hope that readers can provide more perfect solutions. 2. the cutting processing method has encapsulated highlights: 1. you can use php to cut

The difference between ++ I and I ++ in php. 1. the usage of ++ I (taking a ++ I, i2 as an example) first adds the I value to 1 (that is, ii + 1 ), then assign the variable a (that is, ai), then the final a value is equal to 3, and the I value is

How to implement PHP multi-process in Linux. PHP multi-process: Use the ProcessControlFunctions (PCNTL thread control function) function of PHP. see: www. php. netmanualzhref. pcntl. php can only be used in UnixLikeOS, but not in Windows. PHP

Function code written in PHP to evaluate the polynomial derivative. Copy the code as follows :? PhpfunctiongetDerivativeByFormulaAndXDATA ($ formula, $ x_data) {$ xArrayexplode (+, $ formula); $ Derivative0; foreach ($ xArrayas $ x_record) {$ tmp

Collect the php code of the mailbox (capture the email address on the webpage ). Copy the code as follows :? Php $ urlwww.jb51.net; this webpage absolutely contains an email address. $ Contentfile_get_contents ($ url); echo $ content;

Use unset in PHP to destroy variables and release memory. Copy the code as follows: for ($ i1; $ i100; $ I ++) {$ strstr_repeat (01234567, $ I); $ amemory_get_usage (); unset ($ str ); $ bmemory_get_usage (); echon. $ I. :. ($ B- The code is as

The code written by PHP to obtain crawling records of search spider. The following is a search engine that uses php to obtain crawling records of various search Spider. the supported search engines can record the following records: Baidu, Google,

Find the bad name of the code in the project. If condition 1) for | processing, the above code takes more time to understand than the following code. Although reducing the number of lines of code is a good goal, it is often done and

Describes common functions for searching strings in PHP. 1. strstr-stringstrstr (string $ haystack, mixed $ needle [, bool $ before_needlefalse]) appears for the first time to search for a string. Note 1: $ haystack is the string, $ needle is the

MySQL date and time functions are commonly summarized. Obtain the current date + time (date + time) 1.1 Function: now () related function: current_timestamp (), localtime (), localtimestamp () example: 2. get Current date function: Get Current date +

Introduction to the concept of PHP Object. For example, an EmPloyee management application may include an EmPloyee class. Then you can use this class to create and maintain specific instances, such as Gonn and Sally. Create objects based on

Php Data structure and algorithm (PHP description) search and binary search. Copy the code as follows :? Php *** lookup *** sequential lookup functionnormal_search ($ arrData, $ val) {$ lencount ($ arrData); if ($ len0) return-1; for ($ i0; $ I $

Use mktime in PHP to obtain a black humorous analysis of timestamp. The following code is a timestamp provided by most people on the internet. at first glance, it can only be said that the current date is obtained, rather than the timestamp. do not

Openflashchart2.0 simple case php version. 1. openflashchart is a more practical icon rendering plug-in and is open-source. co. the code for copying a ukopen-flash-chart2.FlashChart class is as follows: FlashC 1. openflashchart is a more practical

Use the PHP function memory_get_usage to get the PHP memory consumption. 1. function prototype intmemory_get_usage ([bool $ real_usagefalse]) 2. compatible with PHP44.3.2 and PHP5 3. basic usage and instance 1, get the current memory consumption

Array_key_exists () of the php array function sequence-query whether the array key name exists. Array_key_exists () definition and usage the array_key_exists () function determines whether a specified key exists in an array. if the key exists, true

Php file cache function. Copy the code as follows: functioncreateHashDir ($ sign) {$ md5md5 ($ sign); if (! Is_dir (MB_CACHE) mkdir (MB_CACHE); for ($ i1; $ i4; $ I ++) {$ dir. $ md5 {$ I}.; if (! Is_dir (MB_CACHE The code is as follows: Function