PHP Consider f ...
Consider following code snippet: 
$a = array(1, 3, 5);
$b = array(2, 4, 6);
$b += $a;
What elements will have $b array after executing the code above?
Explanation
The + operator returns the right-hand array appended to the left-hand array; for keys that exist in both arrays, the elements from the left-hand array will be used, and the matching elements from the right-hand array will be ignored.

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