PHP Exercises: Create a function that returns true for all elements of an array, false otherwise

PHP: Exercise-78 with Solution

Write a PHP program to create a function that returns true for all elements of an array, false otherwise.

Sample Solution:

PHP Code:

<?php
// Function definition for 'test_all' that takes an array of items and a custom function as parameters
function test_all($items, $my_func)
{
    // Check if the count of items passing the custom function is equal to the total count of items
    if (count(array_filter($items, $my_func)) === count($items))
        // If all items pass the condition, return 1 (true)
        return 1;
    else
        // If at least one item fails the condition, return 0 (false)
        return 0;
}

// Call 'test_all' with an array of positive numbers and a custom function checking if each item is greater than 0
echo test_all([2, 3, 4, 5], function ($item) {return $item > 0;});
// Display a newline
echo "\n";

// Call 'test_all' with an array of negative numbers and a custom function checking if each item is greater than 0
echo test_all([-2, -3, -4, -5], function ($item) {return $item > 0;});
// Display a newline
echo "\n";

// Call 'test_all' with an array of mixed positive and negative numbers and a custom function checking if each item is greater than 0
echo test_all([-2, 3, 4, -5], function ($item) {return $item > 0;});

?>

Sample Output:

1
0
0

Flowchart:

PHP Code Editor:

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