PHP Exercises: Check two given integers, each in the range 10..99. Return true if a digit appears in both numbers, such as the 3 in 13 and 33

Last update on May 28 2025 13:05:10 (UTC/GMT +8 hours)

52. Shared Digit in Two Integers

Write a PHP program to check two given integers, each in the range 10..99. Return true if a digit appears in both numbers, such as the 3 in 13 and 33.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that checks if the digits of two numbers have any common digit
function test($x, $y)
{
    // Check if the tens digit of $x is equal to the tens digit of $y or if the tens digit of $x is equal to the units digit of $y
    // or if the units digit of $x is equal to the tens digit of $y or if the units digit of $x is equal to the units digit of $y
    return $x / 10 == $y / 10 || $x / 10 == $y % 10 || $x % 10 == $y / 10 || $x % 10 == $y % 10;
}

// Test the 'test' function with different input values and display the results
var_dump(test(11, 21))."\n";
var_dump(test(11, 20))."\n";
var_dump(test(10, 10))."\n";
?>

Explanation:

Function Definition:

The test function checks if two numbers, $x and $y, have any common digit.

Conditions:

The function compares the digits of $x and $y by splitting them into tens and units places.
Specifically, it checks if:

The tens digit of $x is equal to the tens digit of $y.
The tens digit of $x is equal to the units digit of $y.
The units digit of $x is equal to the tens digit of $y.
The units digit of $x is equal to the units digit of $y.

If any of these conditions are met, it returns true; otherwise, it returns false.

Output:

bool(true)
bool(false)
bool(true)

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to check if any digit from the first two-digit number appears in the second two-digit number using string conversion.
Write a PHP function that compares each digit of two numbers in the range 10 to 99 and returns true if any digit is common.
Write a PHP program to extract digits from two integers and determine if there exists an intersection between their digit sets.
Write a PHP script to compare two numbers digit by digit and output a boolean true if they share at least one digit.

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PHP Code Editor:

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