PHP

Code implementation of four basic sorting algorithms in PHP Many people say that algorithms are the core of a program. the quality of algorithms determines the quality of the program. As a beginner phper, although seldom touched on

Php computing page execution time code Class c_Timer { Var $ t_start = 0; Var $ t_stop = 0; Var $ t_elapsed = 0; Function start () {$ this-> t_start = microtime ();} Function stop

PHP compressed image Function scale_dimensions_within_limits ($ w, $ h, $ max_w, $ max_h ){ // $ W is the width of the current rectangle // $ H is the height of the current rectangle // $ Max_w is the maximum width

PHP rounded to retain digits in decimal format /** 1. number_format */ $ Number = 1234.56789; $ Nombre_format_francais = number_format ($ number, 2 ,',',''); $ English_format_number =

Php obtains the user's real IP address If a user uses a proxy server, the real ip address is not in the HTTP_CLIENT_IP header, but needs to be resolved through the http header HTTP_X_FORWARDED_FOR. The following php functions:

Php generates image thumbnails (supported: JPEG, GIT, PNG, BMP) Class Thumb { Public function create ($ srcPath, $ dstPath, $ dstWidth, $ dstHeight) { If (! File_exists ($ srcPath )){ Return

Php code for generating image thumbnails Multiple types of thumbnails are generated. /*************************************** * Author: beluckly) * Completion Time: 2006-12-18 * Class name: CreatMiniature

Php extracts the main color of the image $ I = imagecreatefromjpeg ("image.jpg "); For ($ x = 0; $ x For ($ y = 0; $ y $ Rgb = imagecolorat ($ I, $ x, $ y ); $ R = ($

Limit file download speed php code The following code limits the download speed in php: /* Source: http://www.apphp.com/index.php? Snippet = php-download-file-with-speed-limit */ /* Set here a limit of downloading

Common methods for exporting Excel files using PHP /** * Export data to an excel table * @ Param $ data: A two-dimensional array with a structure similar to the array found from the database * @ Param $ title the

Php watermarking code for images Php watermarking code for images $ Source = imagecreatefromjpeg ('E:/image/guide_pic.jpg '); $ Thumb = imagecreatefromjpeg ('E:/image/l. JPG '); // Obtain the image width,

Php code for traversing all files and folders in a folder Php traverses all files and folders in a folder Function list_dir ($ dirpath ){ If ($ dirpath [strlen ($ dirpath)-1]! = "\") {$ Dirpath. = "\\";} Static $ result_

Use PHPMail to send emails Function send_mail ($ title, $ content, $ from, $ to, $ charset = 'gbk', $ attachment = '') { Include '/class/PHPMail. class. php'; // Baidu Header ('content-Type: text/html; charset = '.

PHP ultimate encryption function // F (ucking) u (ncrackable) e (ncryption) function by BlackHatDBL (www.netforme.net) Function fue ($ hash, $ times ){ // Execute the encryption (s) as frequently times as the user wants

The mimetype type of the file obtained by PHP /** * Obtain the mime type of the object. * @ Author xiaobing. meng * */ Class MimeTypes { Public static $ mime_types = array ( 'Apk '=>

PHP array to generate CSV files A very simple function, from a PHP Group to generate a. csv file. This function uses the built-in fputcsv PHP function to generate comma-separated files (. CSV ). This function has three parameters: data,

Common php regular expressions Class Verify { /** * Verify the user name * @ Param string $ value * @ Param int $ length * @ Return boolean */ Public static function isNames ($ value, $

PHP Implements Fast sorting of arrays through iteration Function quicksortX (& $ seq) { $ Stack = array ($ seq ); $ Sort = array (); While ($ stack ){ $ Arr = array_pop ($ stack ); If (count ($ arr)

Upload PHP images and generate thumbnails /** * Upload images */ Class imgUpload { Static protected $; Protected $ formName; // form name Protected $ directory; // upload a file to a directory

PHP: a common method for downloading images Function getPicture ($ url, $ pictureName ){ If ($ url = "") return false; // Obtain the image extension $ Info = getimagesize ($ url ); $ Mime = $ info ['Mime '];