Part 1 11. Do not gzip output in your application , make apache do that Thinking of using ob_gzhandler ? No dont do that. It doesnt make sense. Php is supposed to write your application. Dont worry about how to optimise data transfer between server and browser inside Php. Use apache mod_gzip/mod_deflate to compress content… Read More »
Php is used to write web applications which are online and publicly accessible. Therefore security is a fundamental necessity of these applications to keep the data safe and free from unauthorized access. Below are a bunch of simple tips/hacks/ideas to design your php applications to have better security. The Code 1. Avoid short tags If… Read More »
In this series we are going to look into some useful tips and techniques that can be used to improve and optimise your php code. Note that these php tips are meant for beginners and not those who are already using mvc frameworks etc. The Techniques 1. Do not use relative paths , instead define… Read More »
Like any other language php applications often need to execute system commands like they are run from the terminal/console/commandline. Php has multiple functions to do this task. Lets take a look at each of these 1. system “system() is just like the C version of the function in that it executes the given command and… Read More »
On linux , the list of locales installed on the system can be fetched through the terminal command locale -a : $ locale -a C C.UTF-8 en_AG en_AG.utf8 en_AU.utf8 en_BW.utf8 en_CA.utf8 en_DK.utf8 en_GB.utf8 en_HK.utf8 en_IE.utf8 en_IN en_IN.utf8 en_NG en_NG.utf8 en_NZ.utf8 en_PH.utf8 en_SG.utf8 en_US.utf8 en_ZA.utf8 en_ZM en_ZM.utf8 en_ZW.utf8 es_AR.utf8 es_BO.utf8 es_CL.utf8 es_CO.utf8 es_CR.utf8 es_DO.utf8 es_EC.utf8 es_ES.utf8… Read More »
This is a small script written in php that can fetch the whois information of an ip address from regional internet registries (RIR). Useful in finding information about ip address.
The simplexml extension of php is quite simple and easy to use when it comes to parsing “well-formatted” xml files. Well formatted means , xml that is not broken or does not have too many errors. One of the most handy functions of this extension is simplexml_load_string. Here is an example : <?php $xml =… Read More »
MPDF Many php applications need to create pdf of documents like invoice , receipt and even id card etc. In this article we shall create a pdf invoice using the mpdf pdf creation library. Mpdf is made in php without any other external library. Mpdf parses css much better than any other free pdf libraries… Read More »
Example of a packet sniffer is Wireshark. Packet sniffers pick up the packets going in and out of a system and analyse them and present them to user for further analysis. In this post we are going to code a simple packet sniffer in php. The basic theory this packet sniffer is that , raw… Read More »
Php functions like zip_open return an error number if they fail. To get the corresponding error message from the error number , use the following function. function zip_error_message($errno) { // using constant name as a string to make this function PHP4 compatible $zipFileFunctionsErrors = array( ‘ZIPARCHIVE::ER_MULTIDISK’ => ‘Multi-disk zip archives not supported.’, ‘ZIPARCHIVE::ER_RENAME’ => ‘Renaming… Read More »