This is because if you use && both conditions must be true. If any one condition becomes false then the overall condition evaluates to false.
The PHP code is as follows −
Example
<!DOCTYPE html>
<html>
<body>
<?php
$firstCondition= "John";
$secondCondition = "David";
if ($firstCondition == "John" && $secondCondition == "David" && ($firstCondition == "Mike" || $firstCondition == "John")) {
echo "The above condition is true";
} else {
echo "The above condition is not true";
}
?>
</body>
</html>Output
The above condition is true