php concatenate variables to function
public function getAvg(string $var) {
# A sample from a game I wrote.
# Concatenatin on the other side is just {stuff.$var}
# You can also concatenate multiple variables in a varaible:
# {$varA.$varb}
$min = $this->{$var._min};
# Assigns to $min object property matching $var + '_min' string.
$max = $this->{$var._max};
# Assigns to $max object property matching $var + '_max' string.
$avg = (($min + $max) / 2);
return round($avg);
}