<p>Abstract</p><p>Security threats against computer systems are a big problem today which also includes PHP made applications. The report is focused on protection with the help of code and not how you protect a web server. Its purpose is not to educate the readers of the thesis how to make a PHP application, the purpose is how to program a safer PHP application. The thesis contains information about common security threats against PHP scripts. It contains in most cases examples of what an attack can look like and how a protection for that example can be achieved. We have tested all code examples if they work by installing our own server with the configurations according to the delimitations of the thesis and putting up small PHP applications, which we have attacked and then protected. The contents and result of this thesis can benefit developers that use PHP as a programming language for creating web applications, by giving them information about common threats and protection.</p>

The purpose of the study is to gain insight into how six young men in Södertälje view the security and insecurity in the district. The young people in the study talk about safety in terms of family, friends and home. In relation to this security is the insecurity, crime, “corners”, “places” and various areas in Södertälje such as Gneta, Hovsjö, Fornhöjden, Ronna and Lina Hage. Four of the youths refers to the police in Södertälje as an aspect of their perceived insecurity. This insecurity stems from their ethnicity and residential area (Södertälje). These four young people speak in negative terms when they talk about the police in Södertalje. These young people touch on similar experiences and attitudes that revolves around injustice, discrimination, persecution and control. Five out of six young people in the study can relate negatively to the media's way of presenting Södertälje, especially in the television program '’Södertäljepolisen’’. This program also paints a different picture of the police in Södertälje, which neither the police or the young people in the study can relate to.

Abstract Security threats against computer systems are a big problem today which also includes PHP made applications. The report is focused on protection with the help of code and not how you protect a web server. Its purpose is not to educate the readers of the thesis how to make a PHP application, the purpose is how to program a safer PHP application. The thesis contains information about common security threats against PHP scripts. It contains in most cases examples of what an attack can look like and how a protection for that example can be achieved. We have tested all code examples if they work by installing our own server with the configurations according to the delimitations of the thesis and putting up small PHP applications, which we have attacked and then protected. The contents and result of this thesis can benefit developers that use PHP as a programming language for creating web applications, by giving them information about common threats and protection.