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Why we use url variable

in many projects I saw developer using URL variable by using ? sign, friends what is use of URL variable, please tell us why it is important

14th Apr 2017, 7:40 AM
Manoj singh jalal
Manoj singh jalal - avatar
1 Odpowiedź
+ 2
Imagine you have code where you use url of some site 100 times. Now you want to change that url. When you use variable you have to change 1 line of code. Otherwise you have to find and change 100 lines of code and pray to not do a single mistake jn process.
14th Apr 2017, 8:00 AM
Jeth
Jeth - avatar