11/23/2023 0 Comments Isset php not certain number redirect![]() If using method 2, it’s a good idea to validate the selected country first, to make sure it won’t result in a redirect to a malicious page. The second method is much more concise, but less secure because a malicious user could monkey around with the form and submit whatever value he wants. The first method requires writing more code, but is more secure because it ensures the form only redirects to 6 pre-programmed cases, or else displays an error message and ends execution. The second method is just passing the selected value to the header function to redirect to the correct page. If the selected country is not found in one of the cases, the “default” case is assumed, and “Error!” is displayed. In this case, each case is redirecting to the corresponding page to the selected country. Each case matches the variable passed the switch and performs all actions after that case up until a break statement. ![]() The switch method is basically a concise method of writing a bunch of “if” statements. These two approaches have their pro’s and con’s. In other words, you can also say that the isset function is used to determine whether you have used a variable in your code or not before. HTTPS : Set to a non-empty value if the script was queried through the HTTPS. A variable is considered as a set variable if it has a value other than NULL. argc: Contains the number of command line parameters passed to the. comment out the method you don't want to demonstrateĬase "France" : $redir = "France.html" break Ĭase "Mexico" : $redir = "Mexico.html" break Ĭase "Russia" : $redir = "Russia.html" break Ĭase "Japan" : $redir = "Japan.html" break ĭefault : echo( "Error!") exit() break The isset function in PHP is used to determine whether a variable is set or not. note that both methods can't be demonstrated at the same time Echo( "There was an error with your form: \n ")
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