find the natural logarithm of a number in php

To find the natural logarithm of a number in PHP, you can use the log() function with the constant M_E as the second parameter. The M_E constant represents the mathematical constant "e", which is the base of the natural logarithm.

Here's an example code snippet:

main.php
$num = 10;
$ln = log($num, M_E);
echo "The natural logarithm of $num is $ln";
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This will output:

main.php
The natural logarithm of 10 is 2.302585092994
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You can also use the shorthand log() function without specifying the base parameter, which will default to the natural logarithm:

main.php
$num = 10;
$ln = log($num);
echo "The natural logarithm of $num is $ln";
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This will output the same result.