Not All Strings In Arrays

Array keys are coerced into strings or integers, while array values are left intact.

Yet, this doesn’t apply to array keys, so this code will display an Uncaught TypeError: Illegal offset type, even without strict_types.

This code needs an explicit cast to string to work.

See Also

• __toString() Magic Method

• string or not? [Try me]

PHP Features

• type-juggling

• string

• class

• cast

• array