Egen loop:
-20°C = -4°F
-10°C = 14°F
0°C = 32°F
10°C = 50°F
20°C = 68°F
30°C = 86°F
40°C = 104°F
var_dump:
array(7) {
[0]=>
int(-20)
[1]=>
int(-10)
[2]=>
int(0)
[3]=>
int(10)
[4]=>
int(20)
[5]=>
int(30)
[6]=>
int(40)
}
array(7) {
[0]=>
int(-4)
[1]=>
int(14)
[2]=>
int(32)
[3]=>
int(50)
[4]=>
int(68)
[5]=>
int(86)
[6]=>
int(104)
}
print_r:
Array
(
[0] => -20
[1] => -10
[2] => 0
[3] => 10
[4] => 20
[5] => 30
[6] => 40
)
Array
(
[0] => -4
[1] => 14
[2] => 32
[3] => 50
[4] => 68
[5] => 86
[6] => 104
)