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PHP xor Keyword

❮ PHP Keywords

Example

Output a message only if just one of the expressions is true:

<?php
if(5 < 3 xor 5 < 10) {
  echo "Only one of the expressions was true";
}
?>
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Definition and Usage

The xor keyword is a logical operator.

Logical operators are used to combine conditional statements.

The return value will only be true if one of the statements is true and the other one is false.

Note: This operator has lower precedence than the assignment operator, which may lead to confusing results. Wrap the expression in parentheses to avoid unexpected results.

Related Pages

Read more about operators in our PHP Operators Tutorial.

More Examples

Example

Show the difference in precedence:

<?php
$result1 = true xor true;
echo "true xor true = ";
echo $result1 ? "true" : "false";

echo "<br>";

$result2 = (true xor true);
echo "(true xor true) = ";
echo $result2 ? "true" : "false";
?>
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❮ PHP Keywords