manz_2007 at yahoo dot com:
You don't seem to understand what a key is. It is the unique
key which references the item in the array. It can't be
duplicated. To make it more clear:
array[0]="hello";
array[0]="world";
print(array[0]);
array[0] will obviously print "world". This is
because you first set the array element with the key 0 to
hello, and then set it to world. The old value is
overwritten.
In your example hire_date is a key, just like 0 is. You set
the value of it twice, and of course the second value
overwrites the first.
You can of course enter duplicate values into an array, but
not keys. Think about it, how would you reference two
different values with one key?
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