PHP Exercises: Test if a given string occurs at the end of another given string

PHP: Exercise-36 with Solution

Write a PHP program to test if a given string occurs at the end of another given string.

Sample Solution:

PHP Code:

<?php
// Function to check if str2 is at the end of str1
function str2_in_str1($str1, $str2) {
    // Calculate the length of str2
    $p_len = strlen($str2);
    // Calculate the length of str1
    $w_len = strlen($str1);
    // Calculate the starting index for str2 in str1
    $w_start = $w_len - $p_len - 1;

    // Check if the substring at the calculated index in str1 is equal to str2
    if (substr($str1, $w_len - $p_len, $p_len) == $str2) {
        return "true";
    } else {
        return "false";
    }
}

// Example usage with different strings
echo str2_in_str1("Python", "on") . "\n";        // Output: true
echo str2_in_str1("JavaScript", "php") . "\n";   // Output: false

?>

Sample Output:

true                                                        
false        

Flowchart:

PHP Code Editor:

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