What are PHP logical operator?
PHP Comparison Operators are used to compare two values (integer, a.k.a. number or string a.k.a. text). The operators are AND, OR, XOR, NOT.
| 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 |
Examples:
<?php
# Example 1
$x = 10;
$y = 5;
if ($x == 10 and $y == 5) {
echo "Condition met! Hello world!";
}
if ($x == 10 && $y == 5) {
echo "Condition met! Hello world!";
}
# Example 2
$x = 10;
$y = 5;
if ($x == 10 or $y == 5) {
echo "Condition met! Hello world!";
}
if ($x == 10 || $y == 5) {
echo "Condition met! Hello world!";
}
# Example 3
$x = 100;
$y = 50;
if ($x == 100 xor $y == 60) {
echo "Condition met! Hello world!";
}
# Example 4
$x = 10;
if ($x !== 90) {
echo "Condition met! Hello world!";
}
?> Learn more about Logical Operators in the official PHP documentation here.
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