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--TEST--
Test log1p() function : usage variations - different data types as $arg argument
--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() : usage variations ***\n";
//get an unset variable
$unset_var = 10;
unset ($unset_var);
// heredoc string
$heredoc = <<<EOT
abc
xyz
EOT;
// get a class
class classA
{
}
// get a resource variable
$fp = fopen(__FILE__, "r");
$inputs = array(
// int data
/*1*/ 0,
1,
12345,
-2345,
2147483647,
-2147483648,
// float data
/*7*/ 10.5,
-10.5,
12.3456789E4,
12.3456789E-4,
.5,
// null data
/*12*/ NULL,
null,
// boolean data
/*14*/ true,
false,
TRUE,
FALSE,
// empty data
/*18*/ "",
'',
array(),
// string data
/*21*/ "abcxyz",
'abcxyz',
$heredoc,
// object data
/*24*/ new classA(),
// undefined data
/*25*/ @$undefined_var,
// unset data
/*26*/ @$unset_var,
// resource variable
/*27*/ $fp
);
// loop through each element of $inputs to check the behaviour of log1p()
$iterator = 1;
foreach($inputs as $input) {
echo "\n-- Iteration $iterator --\n";
var_dump(log1p($input));
$iterator++;
};
fclose($fp);
?>
===Done===
--EXPECTF--
*** Testing log1p() : usage variations ***
-- Iteration 1 --
float(0)
-- Iteration 2 --
float(0.69314718055995)
-- Iteration 3 --
float(9.4210874029538)
-- Iteration 4 --
float(NAN)
-- Iteration 5 --
float(21.487562597358)
-- Iteration 6 --
float(NAN)
-- Iteration 7 --
float(2.4423470353692)
-- Iteration 8 --
float(NAN)
-- Iteration 9 --
float(11.723654587153)
-- Iteration 10 --
float(0.0012338064377078)
-- Iteration 11 --
float(0.40546510810816)
-- Iteration 12 --
float(0)
-- Iteration 13 --
float(0)
-- Iteration 14 --
float(0.69314718055995)
-- Iteration 15 --
float(0)
-- Iteration 16 --
float(0.69314718055995)
-- Iteration 17 --
float(0)
-- Iteration 18 --
Warning: log1p() expects parameter 1 to be double, string given in %s on line %d
NULL
-- Iteration 19 --
Warning: log1p() expects parameter 1 to be double, string given in %s on line %d
NULL
-- Iteration 20 --
Warning: log1p() expects parameter 1 to be double, array given in %s on line %d
NULL
-- Iteration 21 --
Warning: log1p() expects parameter 1 to be double, string given in %s on line %d
NULL
-- Iteration 22 --
Warning: log1p() expects parameter 1 to be double, string given in %s on line %d
NULL
-- Iteration 23 --
Warning: log1p() expects parameter 1 to be double, string given in %s on line %d
NULL
-- Iteration 24 --
Warning: log1p() expects parameter 1 to be double, object given in %s on line %d
NULL
-- Iteration 25 --
float(0)
-- Iteration 26 --
float(0)
-- Iteration 27 --
Warning: log1p() expects parameter 1 to be double, resource given in %s on line %d
NULL
===Done===