PHP Logical Operators: Making Logical Decisions in PHP
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Table of Content:
The PHP logical operators are used to combine conditional statements.
| Operator | Name | Example | Result |
|---|---|---|---|
| and | And | $x and $y | True if both $x and $y are true |
| or | Or | $x or $y | True if either $x or $y is true |
| xor | Xor | $x xor $y | True if either $x or $y is true, but not both |
| && | And | $x && $y | True if both $x and $y are true |
| || | Or | $x || $y | True if either $x or $y is true |
| ! | Not | !$x | True if $x is not true |
Example: $x and $y
True if both $x and $y are true
Code:
<!DOCTYPE html> <html> <body> <?php $x = 50; $y = 60; if ($x == 50 and $y == 60) { echo "Happy Code!"; } ?> </body> </html>
Output:
This will produce the following result
Happy Code!
Example: $x or $y
True if either $x or $y is true
Code:
<!DOCTYPE html> <html> <body> <?php $x = 60; $y = 50; if ($x == 60 or $y == 80) { echo "Happy Code!"; } ?> </body> </html>
Output:
This will produce the following result
Happy Code!
Example: $x xor $y
True if either $x or $y is true, but not both
True if either $x or $y is true, but not both
Code:
<!DOCTYPE html> <html> <body> <?php $x = 60; $y = 50; if ($x == 60 xor $y == 80) { echo "Happy Code!"; } ?> </body> </html>
Output:
This will produce the following result
Happy Code!
Example: $x && $y
True if both $x and $y are true
Code:
<!DOCTYPE html> <html> <body> <?php $x = 60; $y = 50; if ($x == 60 && $y == 50) { echo "Happy Code!"; } ?> </body> </html>
Output:
This will produce the following result
Happy Code!
Example: $x || $y
True if either $x or $y is true
Code:
<!DOCTYPE html> <html> <body> <?php $x = 60; $y = 50; if ($x == 60 || $y == 80) { echo "Happy Code!"; } ?> </body> </html>
Output:
This will produce the following result
Happy Code!
Example: !$x
True if $x is not true
Code:
<!DOCTYPE html> <html> <body> <?php $x = 70; if ($x !== 90) { echo "Happy Code!"; } ?> </body> </html>
Output:
This will produce the following result
Happy Code!