The var_dump Function

The var_dump function displays detailed information about a variable, including its type and value. Accepts one or more parameters of any type. Especially useful when debugging code to check variable contents.

Syntax

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

Example

Let's output information about a string variable:

<?php
	$res = 'Hello world';
	var_dump($res);
?>

Code execution result:

string(11) "Hello world"

Example

Let's output information about an array:

<?php
	$res = [1, 2, 3];
	var_dump($res);
?>

Code execution result:

array(3) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
}

Example

Let's output information about several variables at once:

<?php
	$str = 'abc';
	$num = 123;
	$arr = ['a', 'b'];
	var_dump($str, $num, $arr);
?>

Code execution result:

string(3) "abc"
int(123)
array(2) {
  [0]=>
  string(1) "a"
  [1]=>
  string(1) "b"
}

The var_dump Function

Syntax

Example

Example

Example

See Also