PHP Get Highest Value from Array

I'm trying to get hold of the largest value in an array, while still preserving the item labels. I know I can do this by running sort(), but if I do so I simply lose the labels - which makes it pointless for what I need. Here's the array:

array("a"=>1,"b"=>2,"c"=>4,"d"=>5);

Any ideas?

Don't sort the array to get the largest value.

Get the max value:

$value = max($array);

Get the corresponding key:

$key = array_search($value, $array);

If you just want the largest value in the array use the max function. This will return the largest value, although not the corresponding key. It does not change the original array.

If you care about the the key you could then do

$key = array_search(max($array), $array)

(Edited to include @binaryLV's suggestion)

You could use max() for getting the largest value, but it will return just a value without an according index of array. Then, you could use array_search() to find the according key.

$array = array("a"=>1,"b"=>2,"c"=>4,"d"=>5);
$maxValue = max($array);
$maxIndex = array_search(max($array), $array);
var_dump($maxValue, $maxIndex);

Output:

int 5
string 'd' (length=1)

If there are multiple elements with the same value, you'll have to loop through array to get all the keys.

It's difficult to suggest something good without knowing the problem. Why do you need it? What is the input, what is the desired output?

$a = array(10, 20, 52, 105, 56, 89, 96);
$b = 0;
foreach ($a as $key=>$val) {
    if ($val > $b) {
        $b = $val;
    }
}
echo $b;

You are looking for asort()

Try it.

$data = array("a"=>1,"b"=>2,"c"=>4,"d"=>5); $maxKey = current(array_keys($data, max($data))); var_dump($maxKey);

// assuming positive numbers

$highest_key;
$highest_value = 0;
foreach ($array as $key => $value) {
    if ($value > $highest_value) {
        $highest_key = $key;
    }
}

// $highest_key holds the highest value

$abc=array("a"=>1,"b"=>2,"c"=>4,"e"=>7,"d"=>5);
/*program to find max value*/
$lagest = array();
$i=0;
foreach($abc as $key=>$a) {
    if($i==0) $b=$a;
    if($b<$a) {
        $b=$a;
        $k=$key;
    }
    $i++;
 }
 $lagest[$k]=$b;
 print_r($lagest);

<?php 
$array = array("a"=>1,"b"=>2,"c"=>4,"d"=>5); 

foreach ($array as $key => $value) {
   if ($value >= $max) 
	$max = $key; 	 
}
echo " The array in largest number :".$max."<br/>";
?> 

You need to use by ksort(array("a"=>1,"b"=>2,"c"=>4,"d"=>5)); for more info: http://www.w3schools.com/php/php_arrays_sort.asp

greatestValue=> try this its very easy

$a=array(10,20,52,105,56,89,96);
$c=0;
foreach($a as $b)
{
if($b>$c)
$c=$b;

}
echo $c;

Find highest number, including negative:

return max([abs(max($array)),abs(min($array))]);

$ee = array('a' => 50, 'b' => 25, 'c' => 5, 'd' => 80, 'e' => 40, 'f' => 152, 'g' => 45, 'h' => 28);
$Acurr = '';
$Amax = 0;

foreach($ee as $key => $value) {
	$Acurr = $value;	

	if($Acurr >= $Amax) {
		$Amax = $Acurr;	
	}
}

echo "greatest number is $Amax";

Here a solution inside an exercise:

function high($sentence)
{
    $alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'ñ', 'o', 'p', 'q', 'r', 't', 'u', 'v', 'w', 'x', 'y', 'z'];
    $alphabet = array_flip($alphabet);

    $words = explode(" ", $sentence);

    foreach ($words as $word) {
        $letters = str_split($word);
        $points = 0;
        foreach ($letters as $letter)
            $points += $alphabet[$letter];
        $score[$word] = $points;
    }

    $value = max($score);
    $key = array_search($value, $score);

    return $key;
}

echo high("what time are we climbing up the volcano");

Find largest number without using built-in functions in PHP

<?php
    $array = array(1,2,3);
    $flag = 0;
    foreach($array as $key=>$val){
        if($val > $flag){
           $flag = $val;
        }
        echo "Max value with each iteration: ".$flag."<br/>";
    }
    echo "Final max value: ".$flag;
    ?>

asort() is the way to go:

$array = array("a"=>1,"b"=>2,"c"=>4,"d"=>5);
asort($array);
$highestValue       = end($array);
$keyForHighestValue = key($array);

Try using asort().

From documentation:

> asort - Sort an array and maintain index association > > Description: > > bool asort ( array &$array [, int $sort_flags = SORT_REGULAR ] ) > > This function sorts an array such that array indices maintain their > correlation with the array elements they are associated with. This is > used mainly when sorting associative arrays where the actual element > order is significant.