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

Last update on April 16 2025 12:52:16 (UTC/GMT +8 hours)

71. Check if String Ends with "on"

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:

For more Practice: Solve these Related Problems:

Write a PHP script to verify whether an input string terminates with the substring "on" using substr comparisons.
Write a PHP function to extract the ending letters of a string and check if they match "on".
Write a PHP program to compare the last two characters of a string with the target substring "on" and return a boolean.
Write a PHP script to use regex to determine if the ending pattern of a string is "on".

PHP Code Editor:

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