Html to pdf If your php application needs to generate some kind of pdf report then the simplest approach would be to generate the report as an html and then convert it to pdf using some library. Plenty of libraries are available that can convert html to pdf in php. To name a few -… Read More »
Php applications might need to do some image processing if they are allowing users to upload pictures of somekind. This can include cropping, watermarking, compressing etc. To compress an image the quality needs to be adjusted. Here are few examples function compress_image($src, $dest , $quality) { $info = getimagesize($src); if ($info['mime'] == 'image/jpeg') { $image… Read More »
In a previous article we learned how to . Now lets do the reverse, that is extract tar.gz archives and get the files out. The code to extract a tar.gz archive is very simple and uses PharData class. Here is an example // decompress from gz $p = new PharData('files.tar.gz'); $p->decompress(); // creates files.tar //… Read More »
Tar is a common archive format used on linux. Alone it is just an archiving format, that is it can only pack multiple files together but not compress them. When combined with gzip or bzip2 files are compressed as well. Then it becomes a .tar.gz which is actually a gzip compressed tar file. Php has… Read More »
Proxy with Curl Curl is a very useful library for transferring data over various protocols like http, ftp, https etc. In other words curl can be used to programatically download a web page, or upload file to ftp etc. It also supports using a proxy. This means that curl requests can go through a proxy… Read More »
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 »
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 »