PHP Exercises: Concat two given strings. If the given strings have different length remove the characters from the longer string

PHP Basic Algorithm: Exercise-81 with Solution

Write a PHP program to concat two given strings. If the given strings have different length remove the characters from the longer string.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that concatenates two strings in a specific way
// The resulting string will have the length of the longer input string
function test($s1, $s2)
{ 
    // Check if the length of $s1 is less than the length of $s2
    if (strlen($s1) < strlen($s2))
    {
        // Concatenate $s1 with the end portion of $s2 to make their lengths equal
        return $s1 . substr($s2, strlen($s2) - strlen($s1));
    }
    // Check if the length of $s1 is greater than the length of $s2
    else if (strlen($s1) > strlen($s2))
    {
        // Concatenate the end portion of $s1 with $s2 to make their lengths equal
        return substr($s1, strlen($s1) - strlen($s2)) . $s2;
    }
    // If lengths are equal, simply concatenate the two strings
    else
    {
        return $s1 . $s2;
    }
}

// Test the 'test' function with different pairs of strings, then display the results
echo test("abc", "abcd") . "\n";
echo test("Python", "Python") . "\n";
echo test("JS", "Python") . "\n";
?>

Explanation:

• Function Definition:
• The function test is defined with two parameters:
• $s1: the first input string.
• $s2: the second input string.
• Length Comparison:
• The function checks the lengths of the two strings to determine how to concatenate them.
• Concatenation Logic:
• Case 1: If the length of $s1 is less than the length of $s2:
• The function concatenates $s1 with the end portion of $s2 to make their lengths equal:
• return $s1 . substr($s2, strlen($s2) - strlen($s1));
• Case 2: If the length of $s1 is greater than the length of $s2:
• The function concatenates the end portion of $s1 with $s2 to make their lengths equal:
• return substr($s1, strlen($s1) - strlen($s2)) . $s2;
• Case 3: If the lengths of $s1 and $s2 are equal:
• The function simply concatenates the two strings:
• return $s1 . $s2;

Output:

abcbcd
PythonPython
JSon

Flowchart:

PHP Code Editor:

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