➤ sort() - sort arrays in ascending order.

$numbers = array(5, 1, 3, 4, 2);
sort($numbers);
print_r ($numbers); // outputs:  1 2 3 4 5

$cars = array("Ferrari", "BMW", "Mustang");
sort($cars);
print_r ($cars); // outputs:  BMW Ferrari Mustang
// ASCII Code 66 - B
// ASCII Code 70 - F
// ASCII Code 77 - M

➤ rsort() - sort arrays in descending order.

$numbers = array(5, 1, 3, 4, 2);
rsort($numbers);
print_r ($numbers); // outputs:  5 4 3 2 1

➤ asort() - sort associative arrays in ascending order, according to the value.

$age = array("Keira Knightley"=>"37", "Mads Mikkelsen"=>"56", "Keanu Reeves"=>"58");
asort($age);
foreach($age as $key => $value) {
  echo "Key = $key -> Value = $value \n";
}
// outputs:
// Key = Keira Knightley -> Value = 37 
// Key = Mads Mikkelsen -> Value = 56 
// Key = Keanu Reeves -> Value = 58

➤ ksort() - sort associative arrays in ascending order, according to the key.

$age = array("Keira Knightley"=>"37", "Mads Mikkelsen"=>"56", "Keanu Reeves"=>"58");
ksort($age);
foreach($age as $key => $value) {
  echo "Key = $key -> Value = $value \n";
}
// outputs:
// Key = Keanu Reeves -> Value = 58 
// Key = Keira Knightley -> Value = 37 
// Key = Mads Mikkelsen -> Value = 56 

• arsort() - sort associative arrays in descending order, according to the value. • krsort() - sort associative arrays in descending order, according to the key.