February 3, 2016
Logical Operators in PHP with Example
We have seen how comparison operators work in PHP with conditional statements. Comparison operators compare 2 values and return boolean value (true or false). But we do encounter some scenarios where we want to make our judgement based on 2 boolean values returned by 2 conditions. In such scenario, logical operators comes into play. Most commonly used logical operators are given below. In the below given example, consider $a and $b as boolean values.
| Operator | Name | Meaning |
|---|---|---|
| && | AND | True if $a and $b both are true. |
| || | OR | True if $a or $b is true. |
| ! | Not | True if $a is false or False if $a is true. |
Example of logical operators in PHP is given below.
<?php
$a = 5;
$b = 6;
$c = 5;
$d = 6;
//AND Operator
if(($a == $c) && ($b == $d)){
echo("AND Operator = True, ");
}
//OR Operator
if(($a == $d) || ($b == $d)){
echo("OR Operator = True, ");
}
//NOT Operator
if(!($a == $d)){
echo("Not Operator = True");
}
?>
<?php
$a = 5;
$b = 6;
$c = 5;
$d = 6;
//AND Operator
if(($a == $c) && ($b == $d)){
echo("AND Operator = True, ");
}
//OR Operator
if(($a == $d) || ($b == $d)){
echo("OR Operator = True, ");
}
//NOT Operator
if(!($a == $d)){
echo("Not Operator = True");
}
?>
<?php
$a = 5;
$b = 6;
$c = 5;
$d = 6;
//AND Operator
if(($a == $c) && ($b == $d)){
echo("AND Operator = True, ");
}
//OR Operator
if(($a == $d) || ($b == $d)){
echo("OR Operator = True, ");
}
//NOT Operator
if(!($a == $d)){
echo("Not Operator = True");
}
?>
