In PHP, the **`var_dump()` function** is one function that displays information about a variable or arrays. The information displayed includes the type of the variable and its value.

In the case of *arrays*, each element's type and value is displayed, and in the case of *arrays with arrays*, the arrays are recursively explored to provide their details.
#    
#  Syntax

```
void var_dump($value_1, ...$value_n);
```

#    
#  Parameters
- **`$value`**: The variable whose information is to be dumped.

Multiple `$value` parameters can also be passed.

##   
## Return value
The return type is `void`. This means no value is returned.

##  
## Code

<?php
// an array
$a = array(1, 2, array("first", "second", "third"));
// string
$b = "I am a string value";
//integer
$c = 58;
var_dump($a,$b,$c);
?>

## Explanation
- For the first example, the data type and value are displayed at each index of the array, including the nested array.
 - In the second example, the data type `string` is displayed along with the length of the string and the string value itself.
- In the last example, the value `58` and its `int` type are shown. 

In PHP, the **`var_dump()` function** is one function that displays information about a variable or arrays. The information displayed includes the type of the variable and its value.

In the case of *arrays*, each element's type and value is displayed, and in the case of *arrays with arrays*, the arrays are recursively explored to provide their details.
#    
#  Syntax

```
void var_dump($value_1, ...$value_n);
```

#    
#  Parameters
- **`＄value`**: The variable whose information is to be dumped.

Multiple `＄value` parameters can also be passed.

##   
## Return value
The return type is `void`. This means no value is returned.

##  
## Code

 What is the var_dump() function in PHP?

Displays a variable's type and value; recursively for arrays. Syntax: `void var_dump($value_1, ...$value_n)`.