Equal to identical

[cheprasov]

In PHP any string, that does not started from number is equal (==) 0.
Example:

var_dump(0 == '+'); // true
var_dump(0 == '*'); // true
var_dump(0 == '&'); // true
var_dump(0 == 'foo'); // true

var_dump(0 != '&'); // false

To avoid this behavior is better to use identical operator (===)
Also, === is faster than ==

[Tobion]

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