PHP Var Dump Function

Introduction

In this article, I will explain the "var_dump" variable handling function in PHP. The var_dump() function dumps information about a variable. It displays structured data concerning one or additional expressions that feature its kind and value. Arrays and objects are explored recursively with values indented to point out structure.

Syntax

var_dump(variable);

No value is returned.

Example 1

1. <?php  
2. $a = array(1, 2, array("a", "b", "c"));  
3. var_dump($a);  
4. ?>  

Example 2

1. <?php  
2. $a = array(1, 2, array("a", "b", "c"));  
3. var_dump($a);  
4. ?>  
5. <?php  
6. $var1=678;  
7. $var2="a678";  
8. $var3="678";  
9. $var4="W3resource.com";  
10. $var5=698.99;  
11. $var6=+125689.66;  
12. echo var_dump($var1)."<br>";  
13. echo var_dump($var2)."<br>";  
14. echo var_dump($var3)."<br>";  
15. echo var_dump($var4)."<br>";  
16. echo var_dump($var5)."<br>";  
17. echo var_dump($var6)."<br>";  
18. ?> 

Example 3

1. <?php  
2. $b = 3.1;  
3. $c = true;  
4. var_dump($b, $c);  
5. ?>  

var_dump() vs print_r()

The var_dump() function is for structure information and the print_r() function shows readable information about variables.

Example 1

1. <?php  
2. $name = array("Vinod", "Sharad", "Nitin", "Manish");  
3. var_dump($name);  
4. ?>  

Example 2

1. <?php  
2. $name = array("Vinod", "Sharad", "Nitin", "Manish");  
3. print_r($name);  
4. ?>  

• PHP
• Var Dump
• Var Dump Function
• vardump
• printr

Next Recommended ReadingString Functions in PHP: Part 12

Vinod Kumar

I am MCA qualified from IGNOU, Currently working as a Senior Software Engineer at dogSpot Pvt Ltd, Gurgaon having 3+ year experience and also like web designing and development tools such as PHP, MySQL, HTML, CSS, JavaSc... Read more

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