PHP Exercises: Check if a given string contains between 2 and 4 'z' character

PHP Basic Algorithm: Exercise-22 with Solution

Write a PHP program to check if a given string contains between 2 and 4 'z' character.

Sample Solution:

PHP Code :

<?php
// Define a function that checks if a string contains the character 'z' 2 to 3 times
function test($s) 
{
    // Initialize a counter variable
    $ctr = 0;

    // Loop through each character in the string
    for ($i = 0; $i < strlen($s); $i++)
    {
        // Check if the current character is 'z' and increment the counter if true
        if (substr($s, $i, 1) == 'z')
        {
            $ctr++;
        }
    }

    // Return true if the counter is greater than 1 and less than 4, indicating 'z' occurs 2 to 3 times
    return $ctr > 1 && $ctr < 4;
}

// Test the function with different strings
var_dump(test("frizz"));
var_dump(test("zane"));
var_dump(test("Zazz"));
var_dump(test("false"));
?>

Sample Output:

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

Visual Presentation:

Flowchart:

PHP Code Editor:

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