PHP not equal

One of the comparison operators in PHP is not equal, which is represented by the symbol != or <> and whenever we want to compare the data types of the two given values, we make use of not equal operator in PHP. This not equal operator in PHP returns true if the data type of the given two values are the same even if the value stored in the two variables are not the same, and this not equal operator in PHP returns false if the data type of the given two values are not same even if the value stored in the two variables are same.

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Syntax:

$variable1 != $variable2;
$variable1 <> $variable2;

Where variable1 represents the value of the variable whose data type is to be compared with the variable represented by variable2.

Working of not equal Operator in PHP

• One of the comparison operators in PHP is not equal, which is represented by the symbol != or <>.
• Whenever we want to compare the data types of the two given values regardless of whether the two values are equal or not, we make use of not equal operator in PHP.
• The not equal operator returns true if the data type of the given two values are the same even if the value stored in the two variables are not the same.
• The not equal operator in PHP returns false if the data type of the given two values are not the same even if the value stored in the two variables are the same.

Examples of PHP not equal

Given below are the examples mentioned:

Example #1

PHP program to demonstrate the working of not equal operator to compare the data type of given two values and return the output.

Code:

<?php
//an integer value is stored in a variable called variable1
$variable1 = 10;
echo "The value stored in the first variable is: $variable1<br/>";
//a string value is stored in a variable called variable2
$variable2 = "10";
echo "The value stored in the second variable is: $variable2<br/>";
//not equal operator is used to compare the data type of the given two variables and return the result
echo "The result returned after using not equal operator is: ";
var_dump($variable1 != $variable2);
?>

Output:

In the above program, an integer value is stored in a variable called variable1. Then a string value is stored in a variable called variable2. The value stored in both the variables is the same. Then we are making use of not equal operator to compare the data types of the two variables. The not equal operator returns false because the data type of the two variables are different even though the values stored in the variables are the same.

Example #2

PHP program to demonstrate the working of not equal operator to compare the data type of given two values and return the output.

Code:

<?php
//an integer value is stored in a variable called variable1
$variable1 = "Hello";
echo "The value stored in the first variable is: $variable1<br/>";
//a string value is stored in a variable called variable2
$variable2 = "Welcome";
echo "The value stored in the second variable is: $variable2<br/>";
//not equal operator is used to compare the data type of the given two variables and return the result
echo "The result returned after using not equal operator is: ";
var_dump($variable1 != $variable2);
?>

Output:

In the above program, a string value is stored in a variable called variable1. Then a string value is stored in another variable called variable2. The value stored in both the variables is different. Then we are making use of not equal operator to compare the data types of the two variables. The not equal operator returns true because the data type of the two variables are the same even though the values stored in the variables are different.

Example #3

PHP program to demonstrate the working of not equal operator to compare the data type of given two values and return the output.

Code:

<?php
//an integer value is stored in a variable called variable1
$variable1 = 2.9999;
echo "The value stored in the first variable is: $variable1<br/>";
//a string value is stored in a variable called variable2
$variable2 = 10.55555;
echo "The value stored in the second variable is: $variable2<br/>";
//not equal operator is used to compare the data type of the given two variables and return the result
echo "The result returned after using not equal operator is: ";
var_dump($variable1 != $variable2);
?>

Output:

In the above program, a string value is stored in a variable called variable1. Then a string value is stored in another variable called variable2. The value stored in both the variables is different. Then we are making use of not equal operator to compare the data types of the two variables. The not equal operator returns true because the data type of the two variables are the same even though the values stored in the variables are different.

Example #4

PHP program to demonstrate the working of not equal operator to compare the data type of given two values and return the output.

Code:

<?php
//an integer value is stored in a variable called variable1
$variable1 = "ffffff";
echo "The value stored in the first variable is: $variable1<br/>";
//a string value is stored in a variable called variable2
$variable2 = ffffff;
echo "The value stored in the second variable is: $variable2<br/>";
//not equal operator is used to compare the data type of the given two variables and return the result
echo "The result returned after using not equal operator is: ";
var_dump($variable1 != $variable2);
?>

Output:

In the above program, an integer value is stored in a variable called variable1. Then a string value is stored in a variable called variable2. The value stored in both the variables is the same. Then we are making use of not equal operator to compare the data types of the two variables. The not equal operator returns false because the data type of the two variables are different even though the values stored in the variables are the same.

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