When working with data import and export for example, file formats like csv and excel are commonly used. Data can be exported to csv format and imported elsewhere. Also data might be entered manually in an excel file and then imported in the database. So there might be a need to convert excel files to… Read More »
Tcpdf is a pdf creation library for php that is written in pure php and works without the need of any external library. It also has the feature to generate 2d barcodes like qrcode and pdf417. The 2d barcodes can store much more information than the 2d ones like code39 and ISBN. It is recommended… Read More »
Consider a long running php script that does many tasks and after each task it outputs the status. echo 'Task 1 complete'; …. some delay … echo 'Task 2 complete'; …. more delay and more tasks … Now for such scripts it may be important to load the contents in browser as quickly as they… Read More »
After hacking a web application or server to such an extent that you can upload files to it, the next thing to try is get a proper shell on the system. The most common approach is to create reverse shells. In this approach first a listener program is run on the hacker’s machine and then… Read More »
If your php application is processing media files like mp3, then it might need to find details of the mp3 file like its playtime, bitrate, encoder etc. There is a very useful php library called Getid3 that can extract information from mp3 files. Its written in pure php and does not have any dependencies. Needs… Read More »
Websockets Websockets is a new feature available in browsers as a part of the Html5 specs that allows javascript clients to open bi directional socket connections to a server. Currently all major desktop browsers support the api. Websocket is not an independant socket protocol, but is based on the TCP protocol just like HTTP. Therefore… Read More »
Applications often allow users to select their timezones for reporting the proper time properly. Here is a quick function that can be used to generate a dropdown list of timezones that is easy to read and understand. <?php function get_timezones() { $o = array(); $t_zones = timezone_identifiers_list(); foreach($t_zones as $a) { $t = ''; try… Read More »
Here is a php array containing the language codes and language names as specified by the iso 639-1 standard. Useful when . <?php /** ISO 639-1 Language Codes Useful in Locale analysis References : 1. http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes 2. http://blog.xoundboy.com/?p=235 */ $language_codes = array( 'en' => 'English' , 'aa' => 'Afar' , 'ab' => 'Abkhazian' , 'af'… Read More »
Imagick In a previous article we saw how to use to create a snapshot or thumbnail of the pdf. Now we are going to do the same in php using the Imagick class which provides the bindings for imagemagick library inside php. The library is available in the form of a class Imagick that does… Read More »
Curl According to the official website. curl is a command line tool for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, Gopher, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMTP, SMTPS, Telnet and TFTP. curl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload,… Read More »