Question: In PHP Write a regular expression that matches examples from each of the following: 1. A valid name for php variables ( Variable names must

In PHP Write a regular expression that matches examples from each of the following: 1. A valid name for php variables ( Variable names must begin with a letter or underscore character only. and a variable name can consist of numbers, letters, underscores but you cannot use characters like + , - , % , ( , ) . & , or any special symbols rather that the underscore. 2. Positive integer values less than 100

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