How to determine whether a variable is a scalar using is_scalar in php

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is_scalar -- Check whether a variable is a scalar

Scalar variables refer to those variables that contain integer, float, string or boolean, while array, object and resource are not scalars.

 // string(10) "hemoglobin" // [1]=> // string(20) "cytochrome c oxidase" // [2]=> // string(10) "ferredoxin" // } ?>

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