34,333
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→PHP Mathematical Constants
<td valign="top">Returns e (approx. 2.718)</td>
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<td valign="top">M_EULER</td>
<td valign="top">Returns Euler's constant (approx. 0.577)</td>
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<td valign="top">M_LNPI</td>
<td valign="top">Returns the natural logarithm of PI (approx. 1.144)</td>
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<td valign="top">M_LN2</td>
<td valign="top">Returns the natural logarithm of 2 (approx. 0.693)</td>
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<td valign="top">Returns the natural logarithm of 10 (approx. 2.302)</td>
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<td valign="top">M_LOG2E</td> <td valign="top">4</td>
<td valign="top">Returns the base-2 logarithm of E (approx. 1.442)</td>
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<td valign="top">M_LOG10E</td>
<td valign="top">Returns the base-10 logarithm of E (approx. 0.434)</td>
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