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PHP Exercises: Check a given array of integers and return true if every 5 that appears in the given array is next to another 5

PHP Basic Algorithm: Exercise-121 with Solution

Write a PHP program to check a given array of integers and return true if every 5 that appears in the given array is next to another 5.

Sample Solution:

PHP Code :

<?php
function test($numbers)
 { 
     $arr_len = sizeof($numbers);
     $flag = true;

        for ($i = 0; $i < $arr_len; $i++)
            {
                if ($numbers[$i] == 5)
                {
                    if (($i > 0 && $numbers[$i - 1] == 5) || ($i < $arr_len - 1 && $numbers[$i + 1] == 5)) $flag = true;
                    else if ($i == $arr_len - 1) $flag = false;
                    else return false;
                }
            }
            return $flag;
 }   

var_dump(test([3, 5, 5, 3, 7]));
var_dump(test([3, 5, 5, 4, 1, 5, 7]));
var_dump(test([3, 5, 5, 5, 5, 5]));
var_dump(test([2, 4, 5, 5, 6, 7, 5]));

Sample Output:

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

Flowchart:

Flowchart: Check a given array of integers and return true if every 5 that appears in the given array is next to another 5.

PHP Code Editor:

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Previous: Write a PHP program to check a given array of integers and return true if the value 5 appears 5 times and there are no 5 next to each other.
Next: Write a PHP program to check a given array of integers and return true if the specified number of same elements appears at the start and end of the given array.

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PHP: Tips of the Day

$_REQUEST: This SuperGlobal Variable is used to collect data submitted by a HTML Form

Example:

This code save in a php file and run in the browser.

<!DOCTYPE html> 
<html> 
<body> 
  
<form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>"> 
 NAME: <input type="text" name="user"> 
 <button type="submit">SUBMIT</button> 
</form> 
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") { 
    $name = htmlspecialchars($_REQUEST['user']); 
    if(empty($name)){ 
        echo "Name is empty"; 
    } else { 
        echo $name; 
    } 
} 
?> 
</body> 
</html> 

Output:

Owen