Math Function.php

       <!--Math Function -->
       <!-- 1. abs -> Absolute value
       2.acos -> Acr cosine
       3. acosh -> Inverse Hyperbolic cosine
       4. asin -> Arc sine
       5. asinh -> Inverse Hyperbolic sine
       6. atan2 -> Arc tangent of two variables
       7. atanh -> Inverse Hyperbolic tangent  
       8. base_convert ->Convert a number between arbitrary base
       9. bindec -> Binary to decimal
       10. ceil -> Round fractions up
       11. cos -> Cosine
       12. cosh ->Hyperbolic cosine
       13. decbin ->Decimal to bimary
       14. dechex -> Decimal to hexadecimal
       15. decoct -> Decimal to octal
       16. deg2rad -> Convert the number in degrees to the radian equivalent
       17. exp -> Calculate the exponent of e
       18. expml -> Returns the exp(number)-1, computed in a way that is accurate evene when the value of number is close to zero
       19. floor -> Round fraction down
       20. fmod -> Returns the floating point remainder (modulo) of the division of the arguments
       21. gentrandmax -> Show largest possible random value 
       22. hexdec -> Hexdecimal to decimal.
       23. hypot -> Calculate the length of the hypotenuse of the a right-angle triangle
       24.intdiv -> Integer division
       25.is_finite -> Finds whether a value is a legal finite number
       26. is_infinite -> Finds whether a value is infinite
       27. is_nan -> Finds whether a value  is not a number
       28. lcg_value -> Combined linear congruential generator 
       29. log10 -> Base-10 logarithm
       30. log1p -> Returns log(1+number),computed in a way that is accurate evene when the value of number is close to zero
       31. log -> Natural logarithm
       32. max -> find highest value
       33. min -> find lowest value
       34. mt_getrandmax -> Show largest possible random value
       35.mt_rand -> Generate random  value via the mersenne Twister algorithm Random number generator
       36. mt_stand -> seeds the Mersenne Twister Random number generator
       37. octdes -> octal to decimal
       38. pi -> Get value pi
       39.pow -> Exponential expression
       40. rad2deg -> Convert  the radian number to the equivalent number in degrees
       41. rand -> Generate a random integer
       42. round -> Rounds a float 
       43. sin -> sine
       44. sinh -> Hyperbolic sine
       45. sqrt -> Square root
       46. srand -> Seed the random number generator
       47. tan -> Tangent
       48. tanh -> Hyperbolic tangent
-->
<!-- Some Example -->
<?php 
//  echo sqrt(100);
$value = 1000;
$a = $value;
// echo sqrt($value);
echo sqrt($a);
?>