Why are the results different when using <=> operator in PHP 7 and PHP 8?
In PHP 7:
echo 76 <=> '76 trombones'; // displays 0
In PHP 8:
echo 76 <=> '76 trombones'; // displays -1
Why are the results different when using <=> operator in PHP 7 and PHP 8?
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1 Answers
PHP 8 changed the way non-strict comparison between numbers and non-numeric strings work.
<=> is a non-strict comparison.
The values in your example, 76 and '76 trombones' evaluated as equal in PHP 7 because the string was cast to a number for the comparison, and (int) '76 trombones' is 76.
Now in PHP 8, the number is cast to string for the comparison instead.
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