gistfile1.txt

<?php
$a = array(array(10, 2, 12), array(15,19,7), array(1,5,16) );
$min = $a[0][0];
for($i = 0;$i < count($a);$i++){
    for ($j = 0; $j < count($a[$i]); $j++){
        if($a[$i][$j] < $min)
            $min = $a[$i][$j];
    }
}
echo $min;
echo "<br>";
$a = array(array(10, 2, 12), array(15,19,7), array(1,5,16) );
$min = $a[0][0];
foreach ($a as $item){
    foreach ($item as $item2){
        if($min > $item2)
            $min = $item2;
    }
}
echo $min;
?>