(view source code of ln_php.bat as plain text)
:: https://www.robvanderwoude.com/batchphp.php
:: Returns natural logarithm of specified value
:: Usage: "Ln 100" returns "4.6051701859881", "Ln 2.71828" returns "0.99999932734728"
@IF NOT "%~1"=="" PHP -r print(log(%~1));
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