Testi uutinen pitkä otsikko
When you write a small piece of code, you can keep track of how many variables you have used or the names of the variable you have used in your code. But whenever you are dealing with a large program that contains multiple variables along with multiple arrays or array keys, there is a high possibility that you lose track of what variable names or array names are already used and names not used yet used in your code. In such cases, the isset function comes into the picture.
When you write a small piece of code, you can keep track of how many variables you have used or the names of the variable you have used in your code. But whenever you are dealing with a large program that contains multiple variables along with multiple arrays or array keys, there is a high possibility that you lose track of what variable names or array names are already used and names not used yet used in your code. In such cases, the isset function comes into the picture.
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