PHP/Math/Math

Create and use a simple static Math() class

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<?php define("RAND_MAX", mt_getrandmax()); class Math {

   static $pi = M_PI; 
   static $e = M_E; 
   static function pi() { 
       return M_PI; 
   } 
   static function intval($val) { 
       return intval($val); 
   } 
   static function floor($val) { 
       return floor($val); 
   } 
   static function ceil($val) { 
       return ceil($val); 
   } 
   static function round($val, $decimals = 0) { 
       return round($val, $decimals); 
   } 
   static function abs($val) { 
       return abs($val); 
   } 
   static function floatval($val) { 
       return floatval($val); 
   } 
   static function rand($min = 0, $max = RAND_MAX) { 
       return mt_rand($min, $max); 
   } 
   static function min($var1, $var2) { 
       return min($var1, $var2); 
   } 
   static function max($var1, $var2) { 
       return max($var1, $var2); 
   } 

} $a = 3.5;

echo "Math::\$pi = " . Math::$pi . "\n"; echo "Math::\$e = " . Math::$e . "\n"; echo "Math::intval($a) = " . Math::intval($a) . "\n"; echo "Math::floor($a) = " . Math::floor($a) . "\n"; echo "Math::ceil($a) = " . Math::ceil($a) . "\n"; echo "Math::round(Math::\$pi, 2) = " . Math::round(Math::$pi, 2) . "\n"; echo "Math::abs(-$a) = " . Math::abs(-$a) . "\n"; echo "Math::floatval($a) = " . Math::floatval($a) . "\n"; echo "Math::rand(5, 25) = " . Math::rand(5, 25) . "\n"; echo "Math::rand() = " . Math::rand() . "\n"; echo "Math::min(2, 28) = " . Math::min(3, 28) . "\n"; echo "Math::max(3, 28) = " . Math::max(3, 28) . "\n"; ?>

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Hyperbolic Functions

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Name Description cosh() Hyperbolic cosine (exp(arg) + exp(-arg))/2 sinh() Hyperbolic sine (exp(arg) - exp(-arg))/2 tanh() Hyperbolic tangent sinh(arg)/cosh(arg) acosh() Inverse hyperbolic cosine asinh() Inverse hyperbolic sine atanh() Inverse hyperbolic tangent <?php $start = array(0, 0); $end = array(100, 0); $length = sqrt(pow($end[0] - $start[0], 2) + pow($end[1] - $start[1], 2)); $angle = 35; $r = deg2rad($angle); $new_start = array(20, 20); $new_end = array( $new_start[0] + cos($r) * $length, $new_start[1] + sin($r) * $length ); var_dump($new_end); ?>

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Math calculation

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<?

   $somevar = 5 + 5; // 10
   $somevar = 5 - 5; // 0
   $somevar = 5 + 5 - (5 + 5); // 0
   $somevar = 5 * 5; // 25
   $somevar = 10 * 5 - 5; // 45
   $somevar = $somevar . "appended to end";
   $somevar = false;
   $somevar = !$somevar; // $somevar is now set to true
   $somevar = 5;
   $somevar++; // $somevar is now 6
   $somevar--; // $somevar is now 5 again
   ++$somevar; // $somevar is 6

?>

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Mathematical constants

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Constant Value Meaning

M_PI 3.14159265358979323846 pi

M_PI_2 1.57079632679489661923 pi/2

M_PI_4 0.78539816339744830962 pi/4

M_1_PI 0.31830988618379067154 1/pi

M_2_PI 0.63661977236758134308 2/pi

M_SQRTPI 1.77245385090551602729 sqrt(M_PI)

M_2_SQRTPI 1.12837916709551257390 2/sqrt(M_PI)

M_SQRT2 1.41421356237309504880 sqrt(2)

M_SQRT3 1.73205080756887729352 sqrt(3)

M_SQRT1_2 0.70710678118654752440 1/sqrt(2)

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Math operations

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<? print 2 + 2; print 17 - 3.5; print 10 / 3; print 6 * 9; ?>

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