I am checking bitwise NOT operator including OR in Php but don't get why the output is -1. Is there anyone who can explain why the output is 1 of the following code? Thanks in Advance
$x = 15;
$y = 3;
echo $x | ~$y;
Output: -1;
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6What do you think it should output, and why? – Barmar Nov 18 '19 at 22:10
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Related: https://stackoverflow.com/questions/18754198/confusing-php-bitwise-not-behavior – Barmar Nov 18 '19 at 22:16
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Dear Barmar, I have tried this on my console and got this result. I am learning Php and following the bitwise perception of not and or operator, it seems to me it will be 15 as it is not included the bit of y. Please, can you explain? – Md. Al - mustanjid Nov 18 '19 at 22:20
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@Barmar Thanks for sharing. I understood it. – Md. Al - mustanjid Nov 18 '19 at 22:22
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Look at the values of `15` and `~3` in binary. Then combine them with bitwise-OR. – Barmar Nov 18 '19 at 22:23
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Yeah got it. Thanks again @Barmar – Md. Al - mustanjid Nov 18 '19 at 22:27