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Check integer explode to an array?


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Im trying make a way to check an input to make sure it only consists of "1,2,3,4,5,6,7,8,9,0 and . " I thought i could explode the number and check it to an array that has "1,2,3,4,5,6,7,8,9,0 and . "


I havent worked with arrays before so i dont quite know how they work or to go about this?


Any ideas cause im sure im not the first to ask for something like this



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It depends what you want to do:


1. Do you want to control the user input and return a "yes" or "no" whether it contains forbidden characters?

2. Or do you want to remove all forbidden characters automatically without letting the user know?

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