Highest Array Value in all

Question

This works but is there a better way to do this with php, I want to get the highest value in all of the arrays, If someone could explain in easy terms ,-,

<?php
$marks1 = array(360,310,310,330,313,375,456,111,256);
$marks2 = array(350,340,356,330,321);
$marks3 = array(630,340,570,635,434,255,298);
$i=0;



foreach ($marks1 as $value)  
{   
        if($i > $value || $i == 0)
        $i=$value;
        {
          foreach ($marks2 as $value)
            {
                if($i > $value || $i == 0) 
                    $i=$value;
                foreach ($marks3 as $value)
                {
                    if($i < $value || $i == 0)
                        $i=$value; 
                }                                   

            }
        }   
}
echo "$i<br>";

?>

How about trying max function or you are asking specifically for this logic? — Rajendra arora
– Rajendra arora, Commented Sep 26, 2021 at 6:19
Hint: 3 nested loops is probably the MOST INEFFICIENT method possible: en.wikipedia.org/wiki/Big_O_notation — paulsm4
– paulsm4, Commented Sep 26, 2021 at 6:19

Jacob Mulquin · Accepted Answer · 2021-09-26 06:18:13Z

2

You can merge the arrays together and then use the max function.

$marks1 = array(360,310,310,330,313,375,456,111,256);
$marks2 = array(350,340,356,330,321);
$marks3 = array(630,340,570,635,434,255,298);

$merged = array_merge($marks1, $marks2, $marks3);

$max = max($merged);

answered Sep 26, 2021 at 6:18

Jacob Mulquin

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Rajendra arora · Accepted Answer · 2021-09-26 06:30:31Z

2

If you want to try out with your own max function logic.

You can also try with this way by merging arrays using array_merge function, this will combine all your arrays and will give you the highest value:

<?php
    function get_max_value($my_array){
      $n = count($my_array);
      $max_val = $my_array[0];
      for ($i = 1; $i < $n; $i++)
         if ($max_val < $my_array[$i])
            $max_val = $my_array[$i];
      return $max_val;
    }
   
    $marks1 = array(360,310,310,330,313,375,456,111,256);
    $marks2 = array(350,340,356,330,321);
    $marks3 = array(630,340,570,635,434,255,298);
   
   $my_array = array_merge($marks1, $marks2, $marks3);
   print_r("The highest value of the array is ");
   echo(get_max_value($my_array));
?>

Let me know if it helps.

edited Sep 26, 2021 at 6:30

answered Sep 26, 2021 at 6:24

Rajendra arora

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3 Comments

Osama Zubair Over a year ago

I have to do it without using functions, I am currently an intern and they gave me this task, But I understand I can push values and do it like that Thanks

Nigel Ren Over a year ago

@OsamaZubair, if there are limitations on how you should solve a specific problem, please include this in your question as it helps others find an appropriate solution.

Jacob Mulquin Over a year ago

@OsamaZubair In that case, you can still use 3 foreach loops, but do them one after the other rather than nesting them.

Şahin Ersever · Accepted Answer · 2021-09-26 07:55:35Z

2

If your php version more then 7.4 you can use Spread Operator. If not, the best way using array_merge($marks1, $marks2, $marks3)

<?php
$marks1 = array(360,310,310,330,313,375,456,111,256);
$marks2 = array(350,340,356,330,321);
$marks3 = array(630,340,570,635,434,255,298);

$max = max([...$marks1,...$marks2,...$marks3]);

echo $max; // Result: 635

answered Sep 26, 2021 at 7:55

Şahin Ersever

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Comments

Chanchal Rawat · Accepted Answer · 2021-09-26 12:00:09Z

1

Alternatively, this one can also work for you:

<?php
    
  $marks1 = array(360,310,310,330,313,375,456,111,256);
  $marks2 = array(350,340,356,330,321);
  $marks3 = array(630,340,570,635,434,255,298);
   
  $arr = array_merge($marks1, $marks2, $marks3);
  $b = 0;
  for($i=0;$i<count($arr);$i++)
   {
      if ($arr[$i] > $b)
    {
          $b = $arr[$i];
      }
  }
  echo $b;
?>

// Output:
// 635

answered Sep 26, 2021 at 12:00

Chanchal Rawat

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