Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

PHP Exercises: Create a new array taking the elements before the element value 5 from a given array of integers

PHP Basic Algorithm: Exercise-125 with Solution

Write a PHP program to create a new array taking the elements before the element value 5 from a given array of integers.

Sample Solution:

PHP Code :

<?php
function test($numbers)
    { 
      $size = 0;
      $pre_ele_5;
       for ($i = 0; $i < sizeof($numbers); $i++)
            {
                if ($numbers[$i] == 5)
                {
                    $size = $i;
                    break;
                }
            }
         $pre_ele_5 = [$size];

            for ($j = 0; $j < $size; $j++)
            {
                $pre_ele_5[$j] = $numbers[$j];
            }
         return $pre_ele_5;
            }   

$result = test([1, 2, 3, 5, 7] );
echo "New array: " . implode(',', $result);

Sample Output:

New array: 1,2,3

Flowchart:

Flowchart: Create a new array taking the elements before the element value 5 from a given array of integers.

PHP Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a PHP program to shift an element in left direction and return a new array.
Next: Write a PHP program to create a new array taking the elements after the element value 5 from a given array of integers.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



PHP: Tips of the Day

How to Sort Multi-dimensional Array by Value?

Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

Example:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the spaceship operator:

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual

Ref : https://bit.ly/3i77vCC