PHP

Ajax+php detect if the article title exists codePHP codefunction Checktitle (){$title = Postget (' title ');if (empty ($title)){return false;}Else{$Db = new Db ();$row = $Db->query ("SELECT * FROM news where title = ' $title '");if ($Db->rows ($row))

PHP Database Online Backup code function sqldumptable ($table, $fp =0) {$tabledump = "DROP TABLE IF EXISTS $table; n";$tabledump. = "CREATE TABLE $table (n"; $firstfield = 1; $fields = mysql_query ("Show fields from $table");while ($field = Mysql_

PHP Delete, create directoryJudge the reading and writing situation$dir _writeable = @is_writable ($nowpath)? ' Writable ': ' non-writable '; Delete Directoryif ($doing = = ' Deldir ' && $thefile) {if (!file_exists ($thefile)) {M ($thefile. '

PHP has encountered some problems dynamically generating GIF images, which is now resolved and I am using php4.05 (for Win32) +apache3.1.2_win32.     Problem One: A program that dynamically generates GIF does not turn up     I wrote an example

PHP directory recursive function-lists the files and directories Used to fulfill my needs. The principle of the function is very simple, the main thing is to use a recursive call.function File_list ($path) {if ($handle = Opendir ($path)) {while

PHP User Login code, Getting Started tutorialfunction Login_xzy (){$user _=db ("user");$session _=db ("session");$login [' Email ']=strip_tags ($_post[' email ')];$login [' Pass ']=empty ($_post[' pass '])? ": MD5 ($_post[' pass ']);if ($user =

PHP User Registration and login proceduresfunction Islogin_xzy (){if (!isset ($_session[' user ')) {$json [' Status ']=1;}else{$ssess _=db ("session as S");$where = "S.session_id= '". session_id (). "' and u.uid are not NULL ';if ($user = $ssess

The website frequently hangs the horse? Do some improvement, basically can solve this problem, because Discuz X and so on the procedure existence flaw, was uploaded websehll, each time was deleted once again to come out, finally found all Trojan

1. Specify tags for regular expression filtering The code is as follows:Copy code /*** @ Param $ content* @ Return mixed* Filter the reserved content of Tag.*/Public function delete_tags_a ($ content ){$ Content = preg_replace ("# ] *> (.*?) #

Example  The code is as follows:Copy code Function get_csv_contents ($ file_target ){$ Handle = fopen ($ file_target, 'r ');While ($ data = fgetcsv ($ handle, 1000 ,",")){ $ Num = count ($ data );Echo " $ num fields in line $ row: n ";$ Row

1. Use the for statement to traverse the array cyclicallyA. Other languages (only in this way)In B. PHP, this method is not our preferred method.C. The array must be an index array, and the subscript must be a continuous index array subscript, which

System functionsNote: execute an external program and display the output information.Syntax: string system (string command, int [return_var]);Return value: stringDetails:This function is like the system () function in C, used to execute commands and

To analyze the problem, you need to call the data of A function (currently called function A) and have executed global $ _ G to call global variables, the $ _ G output through print_r also confirms that $ _ G contains data and the plug-in cache is

I. Variable assignmentYou can assign values to variables after they are declared. There are two methods: value assignment and reference assignment.1. Value assignment$ Color = "red ";$ Sum = 12 + "15";/* $ sum = 27 */2. If you want two variables to

Header (string, replace, http_response_code)String is required. Specifies the header string to be sent.Replace is optional. Indicates whether the header replaces the previous header or adds the second header.The default value is true (replace ).

$ People = array ('name', 'sex', 'nation', 'birth ');Foreach ($ people as $ mychrs)Echo $ mychrs ."";Sort ($ people );Echo " --- sorted --- ";Foreach ($ people as $ mychrs)Echo $ mychrs ."";?>The array elements in ascending order are displayed as

Functions and classes, including counting, string connection, function return result, number addition, number multiplication, number size sorting, and other examples implemented by functionsFunction small_numbers (){Return array (0, 1, 2 );}List ($

For example: The code is as follows:Copy code $ Fa = 3.14; Strings and arrays are reference types. That is to say, they are placed in the stack as addresses. When a value is assigned again, the address in the stack changes direction. The

Php generates a barcodeFunction UPCAbarcode ($ code ){$ Lw = 2; $ hi = 100;$ Lencode = array ('20140901', '20160901', '20160901', '20160301', '20160301 ','123', '123', '123', '123', '123 ');$ Rencode = array ('20140901', '20160901', '20160901', '2016

$ Max_allow_links = 100; // maximum number of connections allowed for the license check// This function is reproduced on www.lian123.com. Thank you very much.Function my_file_get_contents ($ url, $ timeout = 30 ){If (function_exists ('curl _ init '))