Introduction to printing arrays in PHP

There are multiple ways to print the content of an array in PHP like var_dump(), print_r(), var_export(), and even json_encode().

Let me review each of them in this article.

Print a PHP array using print_r()

print_r() displays arrays in a human-readable format.

Example:

print_r(['Foo', 'Bar', 'Baz']);

Output:

Array
(
    [0] => Foo
    [1] => Bar
    [2] => Baz
)

If you need to capture the output instead of echoing it, you can pass a second parameter to print_r():

$output = print_r(['Foo', 'Bar', 'Baz'], true);

Print a PHP array using var_dump()

var_dump() prints information about any type of value. It works great for arrays too!

Example:

var_dump(['Foo', 'Bar', 'Baz']);

Output:

array(3) {
  [0]=>
  string(3) "Foo"
  [1]=>
  string(3) "Bar"
  [2]=>
  string(3) "Baz"
}

You can also print an infinite number of variables at once:

var_dump($foo, $bar, $baz, …);

Print a PHP array using var_export()

var_export() prints a parsable string representation of a variable that you could just copy and paste into your source code.

Example:

$array = ['Foo', 'Bar', 'Baz'];

var_export($array);

Output:

array (
  0 => 'Foo',
  1 => 'Bar',
  2 => 'Baz',
)

Print a PHP array using json_encode()

json_encode() can print arrays as JSON.

Example:

$array = ['Foo', 'Bar', 'Baz'];

echo json_encode($array);

Output:

["Foo","Bar","Baz"]

Print a PHP array using Laravel’s dump() function

{: width=“400”}

The dump() function prints in detail arrays containing any value.

$array = ['Foo', 'Bar', 'Baz'];

dump($array);

And just like var_dump(), it accepts an infinite number of arguments:

dump($a, $b, $c, $d, $e, …);

Print a PHP array using Laravel’s dd() function

The dd() function does the same thing as dump(), but stops code execution.

$array = ['Foo', 'Bar', 'Baz'];

dd($array);

It also accepts an infinite number of arguments:

dd($a, $b, $c, $d, $e, …);

Did you like this article? Then, keep learning:

• Discover various methods to check your PHP version effectively for troubleshooting
• Learn how to clear Laravel's cache to resolve various common issues easily
• Dive deeper into PHP debugging especially with Laravel's dump() and dd() functions
• Learn how to handle and fix a common PHP error with foreach loops
• Learn best practices to validate array data in Laravel forms and APIs with ease
• Explore Laravel's Collections to handle arrays more powerfully and conveniently
• Understand Laravel's maintenance mode to safely manage your application's downtime
• Understand and fix common Laravel application encryption key errors quickly
• Master Laravel's query builder and its powerful where clauses
• Learn efficient filtering of database queries in Laravel using whereIn()