PHP Tutorials

1. How to create a PHP installation program In fact, the installation principle of the PHP program is nothing more than to import the database structure and content into the corresponding database, from the process to reconfigure the database

Our grassroots webmaster purchase of the virtual host often have a limited number of files, a large number of small files occupy a large number of resources, the outdated essence of the brother recommended watercress solution, but to have host

Copy CodeThe code is as follows: $filename = './d243375_0.png '; $filename = Realpath ($filename); if (!file_exists ($filename)) { Die ("picture does not exist ~"); } $size = getimagesize ($filename); $file _extension = Strtolower (substr (STRRCHR (

Using single quotes instead of double quotation marks to contain strings can be faster. Because PHP will search for variables in a string surrounded by double quotes, single quotes will not, note: only echo can do this, it is a string can be used as

Copy CodeThe code is as follows: /* A function that determines whether a string exists */ function strexists ($haystack, $needle) { Return! (Strpos ($haystack, $needle) = = = FALSE);//Note the "= = =" Here } /* Test */ $mystring = ' abc '; $findme =

Park,unpark,ord These 3 functions, in our work, they are estimated to be few. I am in a recent job, because the communication needs to use the binary stream, and then the interface is received in PHP. At that time, a lot of information was consulted.

A string is series of characters. String access and modification by character Characters within strings May is accessed and modified by specifying the zero-based offset of the desired character after The string using square array brackets, as in

The goal of the rule is to change the reporting part of php.ini, so that notice does not show error_reporting = E_all; Display all errors, warnings and notices Change into error_reporting = e_error & ~e_notice & ~e_warning Or Isset ($_get["page"])

is to "split" the number in the original array into a "single" bit. Here is a function that I wrote: Copy CodeThe code is as follows: function Splitstrtoarray_mine ($array) { $new _array = Array (); foreach ($array as $value) { $value = (string)

Copy CodeThe code is as follows: /*—————————————————— */ – Recursive deletion of files and directories – Example: Del_dir ('.. /cache/'); Note: returned/is required – $type Force Delete directory, true Yes, false no /*—————————————————— */ function

But in the last few days it's been a bad day, with 90% of attacks that can't be intercepted, take a look at the stats: IP attack and start time Number of attacks Place Note 125.165.1.42

first, what is an array An array is a set of data that organizes a series of data to form an operational whole. Each entity of an array contains two items: A key and a value. ii. Statement of data There are two main ways to declare an array in PHP:

GB2312 Code: Copy CodeThe code is as follows: function Unescape ($STR) { $str = Rawurldecode ($STR); Preg_match_all ("/%u.{4}|& #x .{4};|& #d +;|.+/u", $str, $r); $ar = $r [0]; foreach ($ar as $k = = $v) { if (substr ($v, 0,2) = = "%u") $ar [$k] =

1. Use of arrays in PHP Using associative arrays (associatively-indexed arrays) is helpful when manipulating databases, so let's look at an array traversal of a basic number format: Copy CodeThe code is as follows: $temp [0] = "Richmond"; $temp [1

Looking for a long time, found on-line information is very few, so want to write their own, and slowly found that more problems, their own not much of the algorithm, write a calculation of the short point is OK, long hung, and then long I am afraid

1. mysql_connect ()-Establish database connection Format: Resource mysql_connect ([string hostname [:p ort] [:/path/to/socket] [, string username] [, string password]]) Cases: $conn = @mysql_connect ("localhost", "username", "password") or Die

The principle of the function is very simple, the main is to use a recursive call. Copy CodeThe code is as follows: function File_list ($path) { if ($handle = Opendir ($path)) { while (false!== ($file = Readdir ($handle))) { if ($file! = "." &&

The company has several web sites on the United States virtual host, the server's MySQL service almost every day will suddenly not know when to hang up, and then resumed after a while, suspicion is exceeded the CPU usage limit and is automatically

Mysql.class.php file See http://www.jb51.net/article/25496.htm Copy CodeThe code is as follows: Includes MySQL operation class Include_once ' Mysql.class.php '; Local MySQL Data $mysql _local_data = Array (' db_host ' = ' localhost ', ' Db_user '

The process of configuring PHP and MySQL is omitted, if under Ubuntu, refer to Ubuntu 10.04 installation Memo. 1. Basic syntax The way to embed PHP scripts in HTML code is to Write code in. Output data to the browser using the Echo or print