isset vs empty vs is_null in PHP Example

Today, We want to share with you isset vs empty vs is_null in PHP Example.In this post we will show you wordpress plugin require another plugin, hear for PHP: Test the value of a variable using isset() vs empty() vs is_null() we will give you demo and example for implement.In this post, we will learn about Determine if a variable is set and is not NULL with an example.

isset vs empty vs is_null in PHP Example

There are the Following The simple About PHP isset() vs empty() vs is_null() in PHP Full Information With Example and source code.

As I will cover this Post with live Working example to develop difference between PHP isset() vs empty() vs is_null(), so the php check if string is empty or whitespace is used for this example is following below.

PHP isset() vs empty() vs is_null()

PHP Source Code to Understand the Difference

[php]

ISSET:

“;
$param = “”;
print “isset():”. isset($param).”

“;
$param = “tamilrokers”;
print “isset(‘tamilrokers’):”. isset($param).”

“;
$param = NULL;
print “isset(‘NULL’):”. isset($param).”

“;
$param = FALSE;
print “isset(‘FALSE’):”. isset($param).”

“;
$param = 0;
print “isset(‘0’):”. isset($param).”

“;
print “isset(undefined):”. isset($var3).”

“;

print “

EMPTY:

“;
$param = “”;
print “empty():”. empty($param).”

“;
$param = “tamilrokers”;
print “empty(‘tamilrokers’):”. empty($param).”

“;
$param = NULL;
print “empty(‘NULL’):”. empty($param).”

“;
$param = FALSE;
print “empty(‘FALSE’):”. empty($param).”

“;
$param = 0;
print “empty(‘0’):”. empty($param).”

“;
print “empty(undefined):”. empty($var1).”

“;

print “

IS_NULL:

“;
$param = “”;
print “is_null():”. is_null($param).”

“;
$param = “tamilrokers”;
print “is_null(‘tamilrokers’):”. is_null($param).”

“;
$param = NULL;
print “is_null(‘NULL’):”. is_null($param).”

“;
$param = FALSE;
print “is_null(‘FALSE’):”. is_null($param).”

“;
$param = 0;
print “is_null(‘0’):”. is_null($param).”

“;
print “is_null(undefined):”. is_null($var2).”

“;

?>

[/php]

isset() – isset — Determine if a variable is set and is not NULL
[php]