Basic PHP
Within a namespace, for accessing the built-in PHP classes you can prefix the class name with a . . . . . and let PHP look in the global class list.

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Basic PHP
How does the identity operator === compare two values?

It returns True only if they are both of the same type and value
It converts both values to strings and compares them
It converts them to a common compatible data type and then compares the resulting values
It bases its comparison on the C strcmp function exclusively
If the two values are strings, it performs a lexical comparison

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