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system/vendor/pear/math_biginteger/demo/demo.php

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+<?php
+// $Id$
+// Example of how to use of BigInteger.  The output can be compared to the output that the BCMath functions would yield.
+
+// bcpowmod is included with Math_BigInteger.php via PHP_Compat.
+
+require(__DIR__.'/../vendor/autoload.php');
+
+$x = mt_rand(1,10000000);
+$y = mt_rand(1,10000000);
+$z = mt_rand(1,10000000);
+
+$_x = new Math_BigInteger($x);
+$_y = new Math_BigInteger($y);
+$_z = new Math_BigInteger($z);
+
+echo "\$x = $x;\r\n";
+echo "\$y = $y;\r\n";
+echo "\$z = $z;\r\n";
+
+echo "\r\n";
+
+$result = bcadd($x,$y);
+$_result = $_x->add($_y);
+
+echo "\$result = \$x+\$y;\r\n";
+echo "$result\r\n";
+echo $_result->toString();
+echo "\r\n\r\n";
+
+$result = bcsub($result,$y);
+$_result = $_result->subtract($_y);
+
+echo "\$result = \$result-\$y;\r\n";
+echo "$result\r\n";
+echo $_result->toString();
+echo "\r\n\r\n";
+
+$result = bcdiv($x,$y);
+list($_result,) = $_x->divide($_y);
+
+echo "\$result = \$x/\$y;\r\n";
+echo "$result\r\n";
+echo $_result->toString();
+echo "\r\n\r\n";
+
+$result = bcmod($y,$z);
+list(,$_result) = $_y->divide($_z);
+
+echo "\$result = \$x%\$y;\r\n";
+echo "$result\r\n";
+echo $_result->toString();
+echo "\r\n\r\n";
+
+$result = bcmul($x,$z);
+$_result = $_x->multiply($_z);
+
+echo "\$result = \$x*\$z;\r\n";
+echo "$result\r\n";
+echo $_result->toString();
+echo "\r\n\r\n";
+
+$result = bcpowmod($x,$y,$result);
+$_result = $_x->modPow($_y,$_result);
+
+echo "\$result = (\$x**\$y)%\$result;\r\n";
+echo "$result\r\n";
+echo $_result->toString();
+echo "\r\n\r\n";
+
+// modInverse isn't demo'd because no equivalent to it exists in BCMath.
+
+?>