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|
--TEST--
Test log1p() - basic function test log1p()
--INI--
precision=14
--FILE--
<?php
/* Prototype : float log1p ( float $arg )
* Description: Returns log(1 + number), computed in a way that is accurate even
* when the value of number is close to zero
* Source code: ext/standard/math.c
*/
echo "*** Testing log1p() : basic functionality ***\n";
$values = array(23,
-23,
2.345e1,
-2.345e1,
0x17,
027,
"23",
"23.45",
"2.345e1",
null,
true,
false);
echo "\n LOG1p tests\n";
foreach($values as $value) {
echo "\n-- log1p $value --\n";
var_dump(log1p($value));
};
?>
===Done===
--EXPECTF--
*** Testing log1p() : basic functionality ***
LOG1p tests
-- log1p 23 --
float(3.1780538303479)
-- log1p -23 --
float(NAN)
-- log1p 23.45 --
float(3.1966302159209)
-- log1p -23.45 --
float(NAN)
-- log1p 23 --
float(3.1780538303479)
-- log1p 23 --
float(3.1780538303479)
-- log1p 23 --
float(3.1780538303479)
-- log1p 23.45 --
float(3.1966302159209)
-- log1p 2.345e1 --
float(3.1966302159209)
-- log1p --
float(0)
-- log1p 1 --
float(0.69314718055995)
-- log1p --
float(0)
===Done===
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