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else

(PHP 4, PHP 5, PHP 7)

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:

代码语言:javascript
复制
<?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 →

代码语言:txt
复制
 ? 1997–2017 The PHP Documentation Group

Licensed under the Creative Commons Attribution License v3.0 or later.

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