PHP 7.0.6 Released

    log10

    (PHP 4, PHP 5, PHP 7)

    log10 — Base-10 logarithm

    Description

    float log10 ( float $arg )

    Returns the base-10 logarithm of arg.

    Parameters

    arg

    The argument to process

    Return Values

    The base-10 logarithm of arg

    See Also

    • log() - Natural logarithm

    User Contributed Notes

    jphansen at uga dot edu
    4 years ago
    Alternatively log(x, 10) may be used.
    smalladi at lexgen dot com
    14 years ago
    Note that log of a negative or undefined number returns -Infinity.
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