List of other reserved words
The following words cannot be used to name a class, interface or trait.
Prior to PHP 8.0, they are also prohibited from being used in namespaces.
Reserved words
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parent
|
self
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int
|
float
|
|
bool
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string
|
true
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false
|
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null
|
void (as of PHP 7.1)
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iterable (as of PHP 7.1)
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object (as of PHP 7.2)
|
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mixed (as of PHP 8.0)
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never (as of PHP 8.1)
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array (as of PHP 8.5)
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callable (as of PHP 8.5)
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The following list of words have had soft reservations placed on them.
Whilst they may still be used as class, interface, and trait names
usage of them is highly discouraged since they may be
used in future versions of PHP.
Soft reserved words
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enum
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resource
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numeric
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