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When it comes with Inheritance, what Exactly is the difference between method overriding and late static binding?
Late static binding is essentially method overriding for static methods. There are some subtle differences in how they are actually carried out by the compiler. See What exactly are late static bindings in PHP?
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Are abstract and interface kind of class types?
Any else? Interviewer said there should be 8, but I could not find that many.
Thanks.
I suppose that the interviewer meant about PHP Predefined Interfaces and Classes:
Traversable
Iterator
IteratorAggregate
Throwable
ArrayAccess
Serializable
Closure
Generator
http://php.net/manual/en/reserved.interfaces.php
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i have read this sentence in the object oriented paradigm approach.
A class can never have property values or state. Only objects can.
Can anybody elaborate this ?
Think of a class as a definition of a new data type. As such, it cannot have a state - it's just a definition. Consider this analogy - the concept of integer can't have a value, but a specific variable of integer type may have the value of 7.
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What might be some benefits of array type hinting in methods and functions in PHP besides documentation and readability?
Generally, the sooner you catch an error the easier it is to diagnose. Type hinging in php allows those errors to occur earlier than if something does wrong down in the function or in functions that it calls.
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Some frameworks have their own magic methods names, such as
$player->findByName('Lionel Messi')
which results in a simple SELECT * FROM players WHERE name='Lionel Messi' query. In PHP how can I make similar methods? Do they somehow catch the global MethodNotFoundException?
Use __call magic method.
Read more about it in docs, that is all you need.
http://php.net/manual/en/language.oop5.magic.php
public function __call($name, $args) {
// TODO: Parse called method name and run query if needed
}
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Is there any reason to write public static function instead of just static function? It's still accessible via class name like Class::staticMethod() isn't?
Public is implicit (used if not declared otherwise), so it will work either way.
The point of writing public is to make your code cleaner, easier to read.
E.g. in java, the default visibility is not public, so when a java programmer reads your php, he'll wonder where the heck it is accessible from. Declaring it public saves some headache.