CODEWITHSUNDEEP
php
cycero
cycero

Reputation: 4771

Get the name of the variable which has the highest/biggest value with PHP

I have 4 variables and each of those have an integer assigned to them. Could anybody please let me know how I can get the name of the variable which has the highest value?

Thanks in advance.

Upvotes: 2

Views: 3635

Answers (2)

user229044
user229044

Reputation: 239382

Given four variables:

$a = 1;
$b = 3;
$c = 4;
$d = 2;

You can use compact to turn them into an associative array:

$array = compact('a', 'b', 'c', 'd');
var_dump($array); // array('a' => 1, 'b', => 3, 'c' => 4, 'd' => 2);

And then find the maximum key/value:

$max_key = $max_value = null;

foreach ($array as $key => $value) {
  if (is_null($max_value) || $value > $max_value) {
    $max_key = $key; $max_value = $value;
  }
}

Upvotes: 2

user142162
user142162

Reputation:

Here is a solution to the question you asked:

$arr = compact('v1', 'v2', 'v3', 'v4');
arsort($arr);
$name = key($arr);
// get the value: ${$name}

However, having the variables stored in an array in the first place would make more sense. A better setup would be:

$arr = array('v1' => 543, 'v2' => 41, 'v3' => 1, 'v4' => 931);
arsort($arr);
$name = key($arr);
// get the value: $arr[$name]

Upvotes: 10

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