PHP

1, how to set a long life session?Will Session.cookie_lifetime, Session.gc_maxlifetime time set a little longer. 2, why does the initialization of the session when the error?A, check the storage path of the session file, the path is right, the

Graphics Page Counter Example ? Php $ The code is as follows Copy Code Countfile = "Num.txt";Defines that the file written by the counter is count.txt under the current directory, and then we should test whether the

A function with PHP itself The code is as follows Copy Code Str_replace ("", "", $str);To replace The code is as follows Copy Code $str = "# #使用函数trim去掉字符串两端特定字符";$str 1 = Trim

?For ($y =0 $y {echo "n"; For ($x =0 $x {$abs 00=sqrt (($x * $x) + ($y * $y));if ($abs 00>16)$abs 00=16; $abs 01=sqrt (($x * $x) + ((16-$y) * (16-$y));if ($abs 01>16)$abs 01=16; $abs 10=sqrt ((16-$x) * (16-$x) + ($y * $y));if ($abs 10>16)$abs 10=1

*/ The code is as follows Copy Code $FN = ' Www.111cn.net.txt '$fcon = ' How PHP creates a file '; Contentif ($f =fopen ($FN, "w")){if (fwrite ($f, $fcon)){Echo ' Write a file successfully ';}Else{echo ' File not

Str_replace Replace update in SQL This is in itself a mistake for the following reasons: If you already have an update field in SQL, such as the following SQL The code is as follows Copy Code $sql = "Update content = '

The code is as follows Copy Code $timestamp = time ();function open ($file, $type = ') {Global $fromurl, $referer;$cachename = $file;if ($type) {$file = '/'. $type. ' /'. $file;}else{$file = $file;}if ($open =file ($file)) {$count

Simple about Http_referer One The code is as follows Copy Code $phpSelf = isset ($_server[' php_self '))? $_server[' php_self ']: $_server[' script_name '];$queryString = ';if (!empty ($_server[' query_string

The code is as follows Copy Code $dirs = Array ();foreach (Glob ("test/*") as $d){if (Is_dir ($d)){$dirs [] = $d;}}Print_r ($dirs); Method Two The code is as follows Copy Code Glob ("test/*",

The efficiency of Json_encode and json_decode is not more efficient than serialize and unserialize, the performance is about twice times different when deserializing, PHP 5.3 performs more efficiently than PHP 5.2. The code is as follows

Method One The code is as follows Copy Code $str = ' ';Preg_match_all (' |^Print_r ($out); Method Two The code is as follows Copy Code Preg_match_all ('/href=[' "]+ (. *) [']+/',

Method One The code is as follows Copy Code echo preg_replace (' #[x{4e00}-x{9fa5}] #ue ', ' Chinese_unicode ("") ', "Hello, China");/guarantee "Hello, China" is utf-8.function Chinese_unicode ($c) {Return "U". Dechex

The code is as follows Copy Code ?function Download ($file _dir, $file _name)Parameter description:File_dir: directory where files residefile_name: filename{$file _dir = Chop ($file _dir);//Remove extra spaces from the pathThe path

?if (! $UploadAction):?> The code is as follows Copy Code File Upload Interface " ?Else?> File Upload Code The code is as follows Copy Code ?$UploadAction = 0;echo

function Throw_error ($message) {$error _page = "/err/error.php";$error _url = $error _page;$error _url. = "? redirect_error_notes= $message ";$error _url. = "&redirect_url=". $GLOBALS ["Php_self"];$error _url. = "&redirect_request_method= $REQUEST _

The code is as follows Copy Code Class Foo{public static $my _static = ' foo ';Public Function Staticvalue () {Return self:: $my _static;}}Class Bar extends Foo{Public Function foostatic () {Return Parent:: $my _static;}}Print Foo:: $

// Method 1 use array_filter to call our custom function to filter null values The code is as follows:Copy code Function clear ($){Return $ a <> "";}$ Array = array ("", '', 1 );$ Stt = array_filter ($ array, "clear "); Print_r ($ stt

Header ("Content-type: image/jpeg ");$ Filename = 'book_rabbit_rule.jpg ';/* Read the image file */$ Im = imagecreatefromjpeg ($ filename );/* How much image is to be cut, length/width */$ New_img_width = 120;$ New_img_height = 42;/* Create a new

ajax + php call classic instances without refreshing data // S. Php file$ Db = new Db ();$ Type = ($ action = 'esfpice ')? ;$ SQL = "Select * from cn_loupan_city_price where city_id = '$ Cid' and price_type =' $ type '";$ Query = $ Db-> query ($ SQL

Class SubPages {Private $ each_disNums; // Number of Entries displayed on each pagePrivate $ nums; // The total number of items.Private $ current_page; // the currently selected pagePrivate $ sub_pages; // The number of pages displayed each