PHP Array Exercises : Get the shortest/longest string length from an array

Last update on May 30 2022 11:43:01 (UTC/GMT +8 hours)

PHP Array: Exercise-14 with Solution

Write a PHP script to get the shortest/longest string length from an array.

Sample arrays : ("abcd","abc","de","hjjj","g","wer")

Sample Solution:

PHP Code:

<?php
$my_array = array("abcd","abc","de","hjjj","g","wer");
$new_array = array_map('strlen', $my_array);
// Show maximum and minimum string length using max() function and min() function 
echo "The shortest array length is " . min($new_array) .
". The longest array length is " . max($new_array).'.';
?>

Sample Output:

The shortest array length is 1. The longest array length is 4.

Flowchart:

PHP Code Editor:

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Previous: Write a PHP script which displays all the numbers between 200 and 250 that are divisible by 4.
Next: Write a PHP script to generate unique random numbers within a range.

What is the difficulty level of this exercise?

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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