buy custom Research and Digital Communication essay

buy custom Research and Digital Communication essay Internet today has made work much easier. Anyone can find the information they need through the search engines at the click of a button (Gurak Lannon 2006). The internet has several search engines in which a person can use to access information. In this exercise, the search engines used are Google and Complete planet. First aid is the subject that I chose to research about on the internet. I used both Google and Complete planet to find information for first aid. While searching, comparisons were done on the results obtained, and the speed at which the results were retrieved. Google is more open than complete planet. That is, in Google home page, one only has to type in any word. On entering the subject title on Google, it gave any results for first aid. This information is from all sites found on the internet. While complete planet has topics already listed. Hence, to get information on first aid, one has to click on the related topic and follow the lead. Complete planet does not offer immediate answer as one has to keep following the closes link on the site. Using complete planet takes more time compared to Google. However, both search engines give information to guide the user to the net page. The speed on both Google and complete planet is fast. As observed on the mails on Yahoo, the following conclusions were realized. The mails sent to my inbox come immediately from the sender (Gurak Lannon 2006). The inbox receives as many messages as possible. All new messages are in a sequential order. I have to log in so that I can read the content of the mail. To log in I use my own private password. The e-mail account can be opened by anyone who has the password. Hence, the password is a secret. The e-mails do not seem to be restricted to grammar. The language used is informal. However, it is necessary for the owner of the e-mail to be keen when accessing e-mails. This is because information can easily be retrieved without your permission (Gurak Lannon 2006). Buy custom Research and Digital Communication essay

Understanding the Eval () PHP Language Construct

Understanding the Eval () PHP Language Construct The PHP eval () construct is used to evaluate an input string as PHP and then process it as such. Eval() is not a function, but it works like one in the sense that it outputs everything- except instead of outputting it as text, it outputs it as PHP code to be executed. One use of the eval() construct is to store code in a database to execute later. Example of Eval() LanguageConstruct Here is a simple example of coding for the eval() language construct. ; eval(\$a \$a\;); print $a . ; ? This code example outputs My friends are $name and $name2 when first called with the print statement, and it outputs  My friends are Joe and Jim when called the second time after running eval (). Requirements and Characteristics of Eval() The passed code cant be wrapped in opening and closing PHP tags.The passed code must be valid PHP.All statements must be terminated with a semicolon.A return statement terminates the code evaluation.Any variable defined or changed in eval() remains after it terminates.What a fatal error occurs in the evaluated code, the script exits.Because eval() is a language construct and not a function, it cant be used in higher-order functions. The Danger of Using Eval() The PHP manual discourages the use of the eval() construct, stressing its use is very dangerous because arbitrary PHP code can be executed. Users are instructed to use any other option than eval() unless that is not possible. The use of PHP eval() construct presents security risks.