PHP Exercises: Create a new array taking the elements after the element value 5 from a given array of integers

Last update on May 28 2025 13:04:37 (UTC/GMT +8 hours)

126. Array Elements After Value 5

Write a PHP program to create a new array taking the elements after the element value 5 from a given array of integers.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($numbers)
{ 
    // Get the length of the input array
    $len = sizeof($numbers);

    // Initialize variables to store the size and index
    $size = 0;
    $i = $len - 1;

    // Use a while loop to find the index of the last occurrence of '5' in the array
    while ($i >= 0 && $numbers[$i] != 5)
    {
        // Decrement the index until '5' is found or the beginning of the array is reached
        $i--;
    }

    // Increment the index to get the starting position of the array after the last occurrence of '5'
    $i++;

    // Calculate the size of the array after the last occurrence of '5'
    $size = $len - $i;

    // Initialize an array to store the elements after the last occurrence of '5'
    $post_ele_5 = [$size];

    // Iterate through the elements after the last occurrence of '5' and copy them to the new array
    for ($j = 0; $j < $size; $j++)
    {
        $post_ele_5[$j] = $numbers[$i + $j];
    }

    // Return the array containing elements after the last occurrence of '5'
    return $post_ele_5;
}   

// Call the 'test' function with an example array and store the result in the variable 'result'
$result = test([1, 2, 3, 5, 7, 9, 11] );

// Print the result array as a string
echo "New array: " . implode(',', $result);
?>

Sample Output:

New array: 7,9,11

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to create a new array consisting of all elements that occur after the first instance of the number 5.
Write a PHP function to iterate over an array and return a subarray starting immediately after the first 5.
Write a PHP program to use array slicing to capture all elements following the first occurrence of 5.
Write a PHP script to conditionally output the tail of an array starting from the index of the first detected 5.

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