PHP Array Exercises : Get an array with the first key and value

Last update on May 30 2025 13:14:41 (UTC/GMT +8 hours)

47. Get an Array with First Key and Value

Write a PHP function to get an array with the first key and value.

Sample Solution:

PHP Code:

<?php
// Function to extract and return the first element of an associative array
function array_1st_element($my_array)
{
  // Extract the first key of the array using list() and array_keys()
  list($k) = array_keys($my_array);

  // Create a new array with the first key and its corresponding value
  $result  = array($k=>$my_array[$k]);

  // Remove the first element from the original array
  unset($my_array[$k]);

  // Return the result array containing the first element
  return $result;
}

// Test array
$colors = array('c1'=>'Red','c2'=>'Green','c3'=>'Black');

// Call the function and display the result
print_r(array_1st_element($colors));

?>

Output:

Array                                                       
(                                                           
    [c1] => Red                                             
)

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP function to extract the first key-value pair from an associative array and return it as a new array.
Write a PHP script to use key() and current() functions to create an array containing only the first element.
Write a PHP program to reset an array pointer and then store the first key and value in a new, single-element associative array.
Write a PHP script to loop over an associative array and break after the first iteration, capturing the key and value.

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