What is the purpose of the is_numeric() function in PHP?

To check if a value is numeric
To check if a string is alphanumeric
To check if a value is a string
To check if a value is an integer

The is_numeric() function in PHP is used to check if a value is numeric. It returns true if the value is a number or a numeric string and false otherwise. This function is useful for validating user input or performing numeric operations on values. Learn more: http://php.net/manual/en/function.is-numeric.php

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