How to check whether a variable is empty in PHP

August 18, 2019

<?php
$var1 = 0;
$var2 = NULL; 
$var3 = FALSE;
$var4 = 'PHP Tutorials';
$var5 = array();
$var6 = '';
 
// Testing the variables
if(empty($var1)){
    echo '$var1 is empty.';  //Output: $var1 is empty.
}
echo "<br>";
 
if(empty($var2)){
    echo '$var2 is empty.';  //Output: $var2 is empty.
}
echo "<br>";
 
if(empty($var3)){
    echo '$var3 is empty.';  //Output: $var3 is empty.
}
echo "<br>";
 
if(empty($var4)){
    echo '$var4 is empty.';  
}
else
{
    echo '$var 4 is not empty'; //Output: $var4 is not empty.
}
echo "<br>";
 
if(empty($var5)){
    echo '$var5 is empty.';  //Output: $var5 is empty.
}
echo "<br>";
if(empty($var6)){
    echo '$var6 is empty.';  //Output: $var6 is empty.
}
?>