note 56662 deleted from function.gettype by cmb
| From: | cmb@php.net | Date: | Mon, 02 Nov 2020 21:59:05 +0000 |
| Subject: | note 56662 deleted from function.gettype by cmb | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-215779@lists.php.net to get a copy of this message | ||
Note Submitter: gilthansNOSPAM at gmail dot com
----
NaN and #IND will return double or float on gettype, while some inexistent values, like division by
zero, will return as a boolean FALSE. 0 by the 0th potency returns 1, even though it is
mathematically indetermined.
<?php
$number = 5/0;
$number2 = sqrt(-3);
$number3 = pow(0, 0);
$number4 = 0/0;
echo $number."<br />";
echo $number2."<br />";
echo $number3."<br />";
echo $number4."<br />";
echo "<br />";
echo gettype($number)."<br />";
echo gettype($number2)."<br />";
echo gettype($number3)."<br />";
echo gettype($number4);
?>
This will return:
-1.#IND
1
boolean
double
integer
boolean
0
1
1
0
PHP Warning: Division by zero in C\test.php on line 2 PHP Warning: Division by zero in C:\test.php
on line 5