php_ref_math.asp

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    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_expm1.asp">expm1()</a></td>
    <td valign="top">Returns the value of E<sup>x</sup> - 1</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_floor.asp">floor()</a></td>
    <td valign="top">Returns the value of a number rounded downwards to the 
	nearest integer</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_fmod.asp">fmod()</a></td>
    <td valign="top">Returns the remainder (modulo) of the division of the 
	arguments</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">
	<p align="left"><a href="func_math_getrandmax.asp">getrandmax()</a></td>
    <td valign="top">Returns the maximum random number that can be returned by 
	a call to the rand() function</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_hexdec.asp">hexdec()</a></td>
    <td valign="top">Converts a hexadecimal number to a decimal number</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_hypot.asp">hypot()</a></td>
    <td valign="top">Returns the length of the hypotenuse of a right-angle 
	triangle</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_is_finite.asp">is_finite()</a></td>
    <td valign="top">Returns true if a value is a finite number</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_is_infinite.asp">is_infinite()</a></td>
    <td valign="top">Returns true if a value is an infinite number</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_is_nan.asp">is_nan()</a></td>
    <td valign="top">Returns true if a value is not a number</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_lcg_value.asp">lcg_value()</a></td>
    <td valign="top">Returns a pseudo random number in the range of (0,1)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_log.asp">log()</a></td>
    <td valign="top">Returns the natural logarithm (base E) of a number</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_log10.asp">log10()</a></td>
    <td valign="top">Returns the base-10 logarithm of a number</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_log1p.asp">log1p()</a></td>
    <td valign="top">Returns log(1+number)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_max.asp">max()</a></td>
    <td valign="top">Returns the number with the highest value of two specified 
	numbers</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_min.asp">min()</a></td>
    <td valign="top">Returns the number with the lowest value of two specified 
	numbers</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_mt_getrandmax.asp">mt_getrandmax()</a></td>
    <td valign="top">Returns the largest possible value that can be returned by 
	mt_rand()</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_mt_rand.asp">mt_rand()</a></td>
    <td valign="top">Returns a random integer using Mersenne Twister algorithm</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_mt_srand.asp">mt_srand()</a></td>
    <td valign="top">Seeds the Mersenne Twister random number generator</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_octdec.asp">octdec()</a></td>
    <td valign="top">Converts an octal number to a decimal number</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_pi.asp">pi()</a></td>
    <td valign="top">Returns the value of PI</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_pow.asp">pow()</a></td>
    <td valign="top">Returns the value of x to the power of y</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_rad2deg.asp">rad2deg()</a></td>
    <td valign="top">Converts a radian number to a degree</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_rand.asp">rand()</a></td>
    <td valign="top">Returns a random integer</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_round.asp">round()</a></td>
    <td valign="top">Rounds a number to the nearest integer</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_sin.asp">sin()</a></td>
    <td valign="top">Returns the sine of a number</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_sinh.asp">sinh()</a></td>
    <td valign="top">Returns the hyperbolic sine of a number</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_sqrt.asp">sqrt()</a></td>
    <td valign="top">Returns the square root of a number</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_srand.asp">srand()</a></td>
    <td valign="top">Seeds the random number generator</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_tan.asp">tan()</a></td>
    <td valign="top">Returns the tangent of an angle</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top"><a href="func_math_tanh.asp">tanh()</a></td>
    <td valign="top">Returns the hyperbolic tangent of an angle</td>
    <td valign="top">4</td>
  </tr>
  </table>
<br />
<hr>

<h2>PHP Math Constants</h2>
<p><b>PHP</b>: indicates the earliest version of PHP that supports the 
  constant. </p>
<table class="ex" cellspacing="0" border="1" width="100%" id="table5">
  <tr>
    <th width="30%" align="left">Constant</th>
    <th width="65%" align="left">Description</th>
    <th width="5%" align="left">PHP</th>
  </tr>
  <tr>
    <td valign="top">M_E</td>
    <td valign="top">Returns e (approx. 2.718)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_EULER</td>
    <td valign="top">Returns Euler's constant (approx. 0.577)</td>
    <td valign="top">4</td>
  </tr>
	<tr>
    <td valign="top">M_LNPI</td>
    <td valign="top">Returns the natural logarithm of PI (approx. 1.144)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_LN2</td>
    <td valign="top">Returns the natural logarithm of 2 (approx. 0.693)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_LN10</td>
    <td valign="top">Returns the natural logarithm of 10 (approx. 2.302)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_LOG2E</td>
    <td valign="top">Returns the base-2 logarithm of E (approx. 1.442)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_LOG10E</td>
    <td valign="top">Returns the base-10 logarithm of E (approx. 0.434)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_PI</td>
    <td valign="top">Returns PI (approx. 3.14159)</td>
    <td valign="top">3</td>
  </tr>
  <tr>
    <td valign="top">M_PI_2</td>
    <td valign="top">Returns PI/2 (approx. 1.570)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_PI_4</td>
    <td valign="top">Returns PI/4 (approx. 0.785)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_1_PI</td>
    <td valign="top">Returns 1/PI (approx. 0.318)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_2_PI</td>
    <td valign="top">Returns 2/PI (approx. 0.636)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_SQRTPI</td>
    <td valign="top">Returns the square root of PI (approx. 1.772)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_2_SQRTPI</td>
    <td valign="top">Returns 2/square root of PI (approx. 1.128)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_SQRT1_2</td>
    <td valign="top">Returns the square root of 1/2 (approx. 0.707)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_SQRT2</td>
    <td valign="top">Returns the square root of 2 (approx. 1.414)</td>
    <td valign="top">4</td>
  </tr>
  <tr>
    <td valign="top">M_SQRT3</td>
    <td valign="top">Returns the square root of 3 (approx. 1.732)</td>
    <td valign="top">4</td>
  </tr>
</table>
<br />

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