# How To Calculate Log Of a Number

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 Submitted on: 5/5/2018 7:20:06 PM By: Gaurav Singh Level: Intermediate User Rating: Unrated Compatibility: PHP 3.0, PHP 4.0, PHP 5.0 Views: 4840

How to find Logarithm of Number to the base N in PHP.

 ``` The logarithm is the inverse function to exponentiation. In by = x, Then base b logarithm of a number X is given by logbX. The logarithm to base 10 when base b = 10, is called the common logarithm and The natural logarithm when base b = e (≈ 2.718). To find log in PHP we have a direct log function : log(number, base). For example if we have to find a log of 125 to base 3, just call log function with log(125, 3) . Use this example Log X calculator to calculate Logarithm of a Number. ```

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