On this site: http://php.net/manual/de/function.is-int.php
there's a function that checks if a value is an integer.
The function:
is_int ( mixed $var ) : bool
What does the ": bool" do exactly?
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1http://php.net/manual/en/language.types.boolean.php – executable Jan 11 '19 at 08:57
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@executable Not really helpful here. – deceze Jan 11 '19 at 08:58
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1[Return type declarations](https://secure.php.net/manual/en/functions.returning-values.php#functions.returning-values.type-declaration) – simon Jan 11 '19 at 08:58
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The return value of the function will be a boolean. – Kwun Yeung Jan 11 '19 at 09:01
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just means that the function will return a boolean value. – Stender Jan 11 '19 at 09:01
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:bool there means the return type. That is how they are represented in the the documentation. `echo is_int (1)` will return true while `echo is_int (1.55) ` will return false or no value. – comphonia Jan 11 '19 at 09:02
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Note https://stackoverflow.com/q/24386569/476: the return type used to be on the left side of the signature; looks like they've switched it to correspond to the official type hinting syntax. – deceze Jan 11 '19 at 09:04
