The deg2rad() function converts a degree to its radian number.

<?php
echo deg2rad("30") . "<br />";
echo deg2rad("10") . "<br />";
echo deg2rad("1587") . "<br />";
echo deg2rad("70");
?>

The output of the code above will be:

0.523598775598
0.174532925199
27.6983752292
1.2217304764

Hi,
What is the exact difference between mt_srand() and rand()?

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what is do mt_rand() function in php?

The mt_rand() function returns a random integer using the Mersenne Twister algorithm.

If this function is called without parameters, it returns a pseudo-random value between 0 and RAND_MAX.

If you want a random number between 10 and 100 (inclusive), use mt_rand (10,100).


<?php
echo(mt_rand() . "<br />");
echo(mt_rand() . "<br />");
echo(mt_rand(10,100))
?>

The output of the code above could be:

1150905288
613289478
21

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what is tanh function in php?

The tanh() function returns the hyperbolic tangent of an angle (equivalent to sinh(x) / cosh(x)).



<?php
echo(tanh(M_PI_4) . "<br />");
echo(tanh(0.50) . "<br />");
echo(tanh(-0.50) . "<br />");
echo(tanh(5) . "<br />");
echo(tanh(10) . "<br />");
echo(tanh(-5) . "<br />");
echo(tanh(-10))
?>

The output of the code above will be:

0.655794202633
0.46211715726
-0.46211715726
0.999909204263
0.999999995878
-0.999909204263
-0.999999995878

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what is log1p() function in php?

The log1p() function returns log(1+x), computed in a way that is accurate even when the value of x is close to zero.

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Jegan CBK
"We will either find a way, or make one!”

first of all thanks tell about lodp() function . please give the example of log1p() function.

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Hi Buddies

Thanks for all of your post. i have learn a lot in Mathematical functions in PHP

Thanks
Falcon

The math functions can handle values within the range of integer and float types. I hope without these functions, we can't do the calculation

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I wondered if the switch condition would overall be less efficient if there were a large number of switch statements within a script, instead of a single switch construct with many cases.
The thinking was that the switch condition was possibly more expensive to setup than an if-else. However, in this case, many switch statements still performed faster (around 25% more) than when using many if-else or if,if conditionals instead.

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