PHP Exercises: Check if a given string ends with "on"

PHP Basic Algorithm: Exercise-71 with Solution

Write a PHP program to check if a given string ends with "on".

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that extracts the last two characters from the input string
function test($s1)
{ 
   // Use substr to obtain the last two characters of the input string
   return substr($s1, strlen($s1)-2, 2);
}

// Test the 'test' function with different strings and display the results using var_dump
var_dump(test("Hello"));
var_dump(test("Python"));
var_dump(test("on"));
var_dump(test("o"));
?>

Explanation:

• Function Definition:
• A function named test is defined with one parameter, $s1, which represents the input string.
• Extracting the Last Two Characters:
• The function uses substr($s1, strlen($s1) - 2, 2):
• strlen($s1) - 2 calculates the starting position, which is two characters from the end of the string.
• 2 specifies that two characters should be extracted from this position.
• Return Value:
• The function returns the last two characters of $s1. If $s1 has less than two characters, it returns the whole string.

Output:

string(2) "lo"
string(2) "on"
string(2) "on"
string(1) "o"

Flowchart:

PHP Code Editor:

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