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PHP Exercises: Find the first non-repeated character in a given string

PHP: Exercise-42 with Solution

Write a PHP program to find the first non-repeated character in a given string.

Sample Example:

Input: Green
Output: G
Input: abcdea
Output: b

Sample Solution:

PHP Code:

<?php
// Define a function to find the first non-repeating character in a word
function find_non_repeat($word) {
    $chr = null;

    // Iterate through each character in the word
    for ($i = 0; $i <= strlen($word); $i++) {
        // Check if the count of the current character is 1 (non-repeating)
        if (substr_count($word, substr($word, $i, 1)) == 1) {
            // Return the first non-repeating character found
            return substr($word, $i, 1);
        }
    }
}

// Test the function with different words
echo find_non_repeat("Green")."\n";    // Output: G
echo find_non_repeat("abcdea")."\n";   // Output: b

?>

Sample Output:

G                                                           
b      

Flowchart:

Flowchart: Find the first non-repeated character in a given string.

PHP Code Editor:

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