php - Sort array into alternating smallest largest values?

Solution:

Sort your array then push elements from beginning and end of the array alternatively:

<?php

    $myArray = array(10, 2, 5, 1, 30, 1, 7);
    sort($myArray );
    $count=sizeof($myArray );

    $result= array();
    
    for($counter=0; $counter * 2 < $count; $counter++){

         array_push($result, $myArray[$count - $counter - 1]);
         //check if same elements (when the count is odd)
         if ($counter != $count - $counter - 1) {
             array_push($result, $myArray[$counter]);
         }

    }
    print_r ($result);

?>
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returns:

Array ( [0] => 30 [1] => 1 [2] => 10 [3] => 1 [4] => 7 [5] => 2 [6] => 5 )
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Solution:

<?php
$x = array(10, 2, 5, 1, 30, 1, 7);

// First sort
sort($x);

// Then pick highest and lowest from the back and front of the array
// until it is empty.
$z = array();
while (count($x) > 0){
    $z[] = array_pop($x);
    if (count($x) > 0) // <- For arrays with an odd number of elements.
      $z[] = array_shift($x);
}

var_dump($z);
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Solution:

I can't tell you the exact syntax, my php is very rusty, but what you can do:

• Sort your array in descending order

• Split in in half, let say array A and B;

• Create a new array and add each element from A and B in order$A[i], $B[count($B)-1-i]

This should give you what you need

Solution:

There is no predefined way to do this. However, php allows for a user sort function which you can customise to sort the array in the way you require.