PHP is the most fancied open source language to develop web apps and dynamic web pages, due to its robustness and multi-platform sustenance. Still, PHP developers can misinterpret some elementary issues and make mistakes whilst coding. Errors do not deter the performance of PHP development code as projected, henceforth are easily overlooked. Conversely, they can cause severe logical or semantic errors, and even generate security loopholes into the app. Proper knowledge on PHP development can deliver you with the expertise in ensuring that mistakes are preventable. Keeping this in mind, I am presenting you five PHP development mistakes you have to avoid in order to excel in your business. It is always good to have knowledge of these mistakes.
PHP may be very robust but here are some interesting pitfalls that developers incline to make. Dodging these will certainly enhance the standard and competency of your PHP development projects.
This is a basic mistake where a programmer uses assignment ‘=’ instead of comparison ‘==’. This can alter the value of the variable and cause the data to go haywire! It is significant to mention clean URLs as given in various framework manuals, not ones that have a lot of variables, making it illegible. This is not appropriate in modern practice.
Cache helps expand performance of the app and the database, and improves the user experience. Errors are accessible in a system that tells the programmer that something is wrong. Popping up of incoherent errors on the web is very irksome. A good practice can be to redirect them to an error log. Frequent logging may considerably slow down the website, especially during heavy traffic. Hence a substitute can be to change the default error handler with another personalized one e.g. that could end the application if a serious error occurs. PHP add-ons let the errors to be sent to the back-end instead of popping up on screen, so that they can be searched, classified and fixed later.
An accidentally or inaccurately left development system configuration and perhaps sensitive data can expose the setup to unjustified hacking. It is simple to remove app that allows admittance to development version of the app from the actual deployed servers. If the website is hosted on a shared server, this file can be is a sitting duck for malicious users. Keeping the local PHP settings definite to the hosting account of the programmer guarantees that a restricted and more protected environment is available for the app. By generating a page that calls the function to list the specific values of the variables, and keeping this page in a safe private area not accessible to public is an upright practice.
Inputs from users with bad intentions may creep in as arguments in URL strings or as data from forms, which can permit a user to see the local details and files of the website. It is thus very valuable to authorize the data as per expected values/ranges before letting it to be passed into the system for further use/processing. A hacker can embed a client-side script in a data to be exhibited on the webpage, such as in comments, which eventually gets executed on the server to steal some sensitive information via the back-end and let everything appear normally on the server. Exploiting a database query allows a user to inject query strings that can fetch sensitive records from the database for the user is a common SQL injection technique engaged by hackers. Validating user-entered data or is very important to avoid all of these.
This is non-operational in a way, and is insecure, unreliable and does not support SSL. Deprecation notices emerge on top of the app, which can be accessed anywhere simply by Google and shall expose all the sites to a misuser. Instead, one should use the MySQLi that is more up-to-date, reliable and faster. PHP Data Objects allows the use of object-oriented syntax, and this would align the code for databases such as MS SQL and PostgreSQL as well. A time saving feature allows injection of fetched data directly into objects and also use named parameters for comfort.
Dymanic calls to isolated functions such as file system calls are open invitations for hackers to remotely execute code on the local server. Being aware of these development mistakes can ensure that each of these can be well addressed. Thus, a programmer can consciously use the latest and smooth features of PHP to make a smart and secure web app.