PHP Array Exercises : Trim all the elements in an array using array_walk function

PHP Array: Exercise-35 with Solution

Write a PHP script to trim all the elements in an array using array_walk function.

Sample Solution:

PHP Code:

<?php
// Define an array with string values containing extra whitespaces
$colors = array( "Red ", " Green", "Black ", " White "); 

// Display the original array using print_r
print_r($colors);

// Use array_walk and create_function to trim whitespaces from each array element
array_walk($colors, create_function('&$val', '$val = trim($val);')); 

// Display the modified array after trimming whitespaces
print_r($colors);
?>

Output:

Array                                                       
(                                                           
    [0] => Red                                              
    [1] =>  Green                                           
    [2] => Black                                            
    [3] =>  White                                           
)                                                           
Array                                                       
(                                                           
    [0] => Red                                              
    [1] => Green                                            
    [2] => Black                                            
    [3] => White                                            
)  

Flowchart:

PHP Code Editor:

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