if
elseif/else if
Estruturas de Controle
PHP Manual

## else

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).

if
elseif/else if
Estruturas de Controle
PHP Manual