PHP Tutorials

Working with files in PHP is a basic requirement for PHP programmers, and PHP provides a number of tools for creating, uploading, and editing files.This tutorial begins by explaining how to interact with a file. To help you understand all the types

foreach ($array as $value) {//$array the array to traverse, $value pointer to the current value of the array, as the function of the assignment code to executed; } Copy CodeThe foreach statement can also get the key name of

PHP code Chr (0) is not NULL Null is nothing, and Chr (0) has a value of 0. 16 binary is 0x00, which means binary is 00000000 Although Chr (0) will not show anything, but he is a character. When the Chinese character is truncated, according to the

Variable Empty is_null isset $a = "" True false True $a =null true True false var $a true true false $a =array () True false true $a =false true false true $a =15 false False true $a =1 false False

Header ("Content-type:image/png"); $im = Imagecreate (150, 150); $grey = Imagecolorallocate ($im, 230, 230, 230); $black = imagecolorallocate ($im, 0, 0, 0); Imagestring ($im, 3, 5, 5, "Figure 18.5:circle",

Header ("http/1.1 301 Moved permanently"); Header ("location:http://www.example.com/newpage/"); Exit ?> Copy CodePHP 301 for IIS: Header ("status:301 Moved permanently"); Header ("location:http:

/** * Determine the search engine to route the page * edit:bbs.it-home.org */ $flag = false; $tmp = $_server[' http_user_agent '); if (Strpos ($tmp, ' Googlebot ')!== false) { $flag = true; } else if (Strpos ($

Class Employee { Defining constants Const AVAILABLE = 0; Const OUT_OF_STOCK = 1; Public $status; } Print employee::available; ?> Copy CodeExample 2, defining constants in a class

Ini_set ("Display_errors", 1);//Whether an error message is displayed Ini_set (' include_path ', Ini_get (' include_path '). ';D: \ \php\\phpexcel 1.6.6\\tests\\classes\\ ');//Set this page to include a path Include "classes/phpexcel.php";

Share a few PHP code to get the current CPU usage in the system, a friend of the need to make a reference to it.In PHP, you can use Getrusage () to get CPU usage, which applies only to Linux systems. Example: 0 [Ru_inblock] + 0 [ru_msgsnd] = 2

This article describes how to format the contents of a string as an array, and how to convert the method to actual arrays, as required by a friend reference.There is a string that stores the contents of an array, for example:$STR = "Array (' USD ' =

Sharing the next PHP call user-defined functions, there are simple and complex, suitable for beginners to the PHP custom Function Reference.The Call_user_func function, the Call_user_func_array function, and the CALL_USER_FUNC function are often

/** * File directory Operation class * Editor: Bbs.it-home.org Example * $fileutil = new Filedirutil (); * $fileutil->createdir (' A/1/2/3 '); Test build folder Build a A/1/2/3 folder * $fileutil->createfile (' B/1/2/3 '

function safeencoding ($string, $outEncoding = ' UTF-8 ') { $encoding = "UTF-8"; for ($i =0; $i { if (Ord ($string {$i}) Continue if ((Ord ($string {$i}) &224) ==224) { The first byte is judged

This article shares the following PHP use mysqli extension operation MySQL database of several examples, very good, have the need of friends can refer to, will certainly help.1, MYSQLI Expansion Library operation of MySQL DQL Connect_error)

This article introduces a few examples of the Eval function in PHP, with the need for a friend to refer to it.In PHP, the eval function is used to substitute values into strings.Syntax: void eval (string code_str); Return value: No function type:

This article describes two examples of PHP global variables $_server, namely, record access information, $_server[' Request_ The use of METHOD '. Please refer to the friends who are in need. Example 1, record the visitor information to obtain the

/** * Mysqli Extension Example * by bbs.it-home.org */ $mysqli = Mysqli_connect ("localhost", "root", "" "," MyDatabase ", 3306); $result = Mysqli_query ($mysqli, "select * from MyTable"); while ($row =

PHP gets today's start timestamp and end timestamp $beginToday =mktime (0,0,0,date (' m '), date (' d '), date (' Y ')); $endToday =mktime (0,0,0,date (' m '), date (' d ') +1,date (' Y '))-1; PHP gets yesterday start timestamp

If you have http_x_wap_profile, it must be a mobile device. if (Isset ($_server[' http_x_wap_profile ')) { return true; } Copy CodeAnalysis: By getting the Http_x_wap_profile information returned by the client, it can