else

(PHP 4, PHP 5, PHP 7, PHP 8)

Often you'd want to execute a statement if a certain condition is met, and a different statement if the condition is not met. This is what else is for. else extends an if statement to execute a statement in case the expression in the if statement evaluates to false. For example, the following code would display a is greater than b if $a is greater than $b, and a is NOT greater than b otherwise:

<?php
if ($a $b) {
  echo 
"a is greater than b";
} else {
  echo 
"a is NOT greater than b";
}
?>
The else statement is only executed if the if expression evaluated to false, and if there were any elseif expressions - only if they evaluated to false as well (see elseif).

Note: Dangling else

In case of nested if-else statements, an else is always associated with the nearest if.

<?php
$a 
false;
$b true;
if (
$a)
    if (
$b)
        echo 
"b";
else
    echo 
"c";
?>
Despite the indentation (which does not matter for PHP), the else is associated with the if ($b), so the example does not produce any output. While relying on this behavior is valid, it is recommended to avoid it by using curly braces to resolve potential ambiguities.