PHP var_dump() Function

PHP var_dump() Function

Last Updated : 30 Sep, 2024

The var_dump() function in PHP is used to display structured information about one or more variables. The structured information means type and value of the given variable. It outputs not just the value of the variable but also its data type and, in the case of arrays or objects, all of their structure.

Syntax

var_dump(mixed $value, mixed ...$values): void

Parameters

$value: The variable or value to be dumped.
$values: Additional variables to dump (optional).

Return Value

This function does not return any value. It outputs the result directly to the browser or console.

Example 1: Basic example of var_dump() function.

PHP

<?php

$number = 123;
$string = "Hello, World!";
$array = [1, 2, 3, "PHP", true];

var_dump($number);
var_dump($string);
var_dump($array);

?>

Output

int(123)
string(13) "Hello, World!"
array(5) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
  [3]=>
  string(3) "PHP"
  [4]=>
  bool(true)
}

Example 2: The use of var_dump() function on objects.

PHP

<?php

class Test {
  public $name = "PHP";
  public $version = 8;
}

$obj = new Test();
var_dump($obj);

?>

Output

object(Test)#1 (2) {
  ["name"]=>
  string(3) "PHP"
  ["version"]=>
  int(8)
}

Example 3: The use of var_dump() function in nested array.

PHP

<?php
  
$nestedArr = [
  	"languages" => ["PHP", "JavaScript", "Python"],
  	"frameworks" => ["Laravel", "React", "Django"]
];

var_dump($nestedArr);

?>

Output

array(2) {
  ["languages"]=>
  array(3) {
    [0]=>
    string(3) "PHP"
    [1]=>
    string(10) "JavaScript"
    [2]=>
    string(6) "Python"
  }
  ["frameworks"]=>
  array(3) {
    [0]=>
    string(7) "Laravel"
    [1]=>
    string(5) "React"
    [2]=>
    string(6) "Django"
  }
}

PHP var_dump() Function

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