UNSW ProgComp: Problem 5 - 2005

<?php
$input = <<<END
5 6
1 2 3 2 1 0
2 3 4 6 10 4
3 5 7 8 9 6
2 3 4 7 8 7
1 2 3 6 2 1
END;
$input = trim($input);
$input = explode("\n", $input);
foreach($input as $key => $value){
    $input[$key] = trim($value);
}
foreach($input as $key => $value){
    if($key == 0){
        $table_info = explode(" ", $value);
    }else{
        $table[$key-1] = explode(" ", $value);
    }
}
$greatest = array(0, 0, 0);
for($y = 0; $y < $table_info[0]; $y++){
    $incrementing = 1;
    $last = null;
    $has_incremented = 0;
    for($x = 0; $x < $table_info[1]; $x++){
        if($incrementing == 1 && $last < $table[$y][$x] && $x != ($table_info[1]-1)){
            $last = $table[$y][$x];
            $has_incremented = 1;
            if($last > $greatest[0]){
                $greatest = array($last, $x, $y);
            }
        }elseif($has_incremented == 0){
            $out = $y+1;
            die("row $out is not a hill vector");
        }elseif($last == $table[$y][$x]){
            $out = $y+1;
            die("row $out is not a hill vector");
        }else{
            $incrementing = 0;
        }
        if($incrementing == 0 && $last > $table[$y][$x]){
            $last = $table[$y][$x];
        }elseif($incrementing == 0){
            $out = $y+1;
            die("row $y is not a hill vector");
        }
    }
}
for($x = 0; $x < $table_info[1]; $x++){
    $incrementing = 1;
    $last = null;
    $has_incremented = 0;
    for($y = 0; $y < $table_info[0]; $y++){
        if($incrementing == 1 && $last < $table[$y][$x] && $y != ($table_info[0])){
            $last = $table[$y][$x];
            $has_incremented = 1;
            if($last > $greatest[0]){
                $greatest = array($last, $x, $y);
            }
        }elseif($has_incremented == 0){
            $out = $x+1;
            die("column $out is not a hill vector");
        }elseif($last == $table[$y][$x]){
            $out = $x+1;
            die("column $out is not a hill vector");
        }else{
            $incrementing = 0;
        }
        if($incrementing == 0 && $last > $table[$y][$x]){
            $last = $table[$y][$x];
        }elseif($incrementing == 0){
            $out = $x+1;
            die("column $out is not a hill vector");
        }
    }
}
$column = $greatest[1]+1;
$row = $greatest[2]+1;
echo "peak found at row $row column $column";