PHP Array Exercises : Sort entity letters

Last update on May 30 2025 13:14:51 (UTC/GMT +8 hours)

25. Sort Entity Letters

Write a PHP function to sort entity letters.

Sample Solution:

PHP Code:

<?php
// Define a function to sort an array of entities
function entity_sort($my_array) {
    // Iterate through each element in the array
    foreach ($my_array as &$element) {
        // Check if the element is not empty
        if (!empty($element)) {
            // Prepend the element with its first character
            $element = $element[0] . $element;
        }
    }
    // Sort the modified array
    sort($my_array);
    // Iterate through each element in the array
    foreach ($my_array as &$element) {
        // Remove the first character from each element
        $element = substr($element, 1);
    }
    // Return the sorted array
    return $my_array;
}
// Create an array containing space, "&", and ">"
$arr = array(" ", "<", "&");
// Call the entity_sort function and print the result
print_r(entity_sort($arr));
?>

Output:

Array ( [0] => [1] => & [2] => < )

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP function to sort the letters in a given string alphabetically and return the sorted string.
Write a PHP script to convert a string to an array of characters, sort it, and then rejoin them into a new string.
Write a PHP program to compare two strings by their sorted letter order and output which string is "alphabetically" smaller.
Write a PHP script to sort each word in a sentence individually, preserving word order, and display the result.

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PHP Code Editor:

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