PHP difference between echo,print and printf

Echo, print and printf these three are used for printing the text. Here i am going to explain the difference between these three

echo
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*) it's a construct.
*) allow multiple parameters
*) does not return any value

print
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*) it's also a construct.
*) do not support multiple parameters
*) return true if it success or false if it fail

printf
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*) it's a function not a construct
*) allow multiple parameters