find the base e logarithm of a number in php

To find the base e logarithm of a number in PHP, you can use the built-in log() function with the constant M_E as the base parameter. M_E is a predefined constant in PHP that represents the mathematical constant e (2.718281828459).

Here's an example:

main.php
<?php
$num = 10;
$log_e = log($num, M_E);
echo "The natural logarithm of $num is: $log_e";
?>
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Output:

main.php
The natural logarithm of 10 is: 2.302585092994
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2 lines

In this example, we pass the number 10 as the first argument to log() and M_E as the second argument to specify that we want to find the base e logarithm of 10. The resulting value is stored in the $log_e variable, which we print using echo. The output shows that the natural logarithm of 10 is approximately 2.3026.