Récupérer min, max d'un tableau sans utiliser les fonctions PHP

johand@osiris:~/src/CCM$ cat minmax.php
#! /usr/bin/php
<?php

function myMin(&$anArray)
{
 $min = PHP_INT_MAX;
 foreach($anArray as $current)
        {
            if ($current < $min)
                {
                    $min = $current;
                }
        }
 return $min;
}

function myMax(&$anArray)
{
 $max = -PHP_INT_MAX ;
    # should be
    #    $max = PHP_INT_MIN ;
 foreach($anArray as $current)
        {
            if ($current > $max)
                {
                    $max = $current;
                }
        }
    return $max;
}
$test = array(5, 7, 2, 10, 1000, 4, 1, 8, 18, 32);
printf("min is %d\n", myMin($test));
printf("max is %d\n", myMax($test));

?>

johand@osiris:~/src/CCM$ ./minmax.php
min is 1
max is 1000

<?php
$test = array(5, 7, 2, 10, 1000, 4, 1, 8, 18, 32);

 $min = $test[0];
 for($i=0; $i < 10; $i++){
  if ($test[$i] < $min){
   $min = $test[$i];
  }
 }

 $max = $test[0];
 for($i=0; $i < 10; $i++){
  if ($test[$i] > $max){
   $max = $test[$i];
  }
 }
 echo $min.'<br/>';
 echo $max;
?>