Pre/Post Increment, Decrement

$index++; // Post-increment, Give the value of index, then increments index by one
++$index; // Pre-increment, increments index by one, then returns the valueof index
$index–; // Post-decrement, Give the value of index, then decreases index by one
–$index; // Pre-drecrement, decreased increments index by one, then returns the value of index

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