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Bug #80943 pow and ** different result
Submitted: 2021-04-08 23:17 UTC Modified: 2021-04-08 23:31 UTC
From: inpostdpua at gmail dot com Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 8.0.3 OS: all
Private report: No CVE-ID: None
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From: inpostdpua at gmail dot com
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 [2021-04-08 23:17 UTC] inpostdpua at gmail dot com
echo pow(-3, 3.5); // NAN
echo "\r\n";
echo -3**3.5; // -46.76537180436

As i think, it`s must be same result.

Test script:
echo pow(-3, 3.5);
echo "\r\n";
echo -3**3.5;


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 [2021-04-08 23:31 UTC]
-Status: Open +Status: Not a bug
 [2021-04-08 23:31 UTC]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at and the instructions on how to report
a bug at
** has higher precedence than -. Use parentheses like (-3)**3.5.
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