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Two ** in PHP can directly find the nth power of a number. Why is there still a pow() function?

WBOY
WBOYOriginal
2016-09-30 09:37:301485browse

<code>$a = 2**6;
echo $a;
$b = pow(2,6);
echo $b;</code>

?>

Reply content:

<code>$a = 2**6;
echo $a;
$b = pow(2,6);
echo $b;</code>

?>

You have to look at when this operator was implemented

https://wiki.php.net/rfc/pow-...

Because it needs to be backward compatible

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