PHP条件语句，是否需要括号？

您可以执行以下其他语句：

<?phpif ($something) {   echo 'one conditional line of pre';   echo 'another conditional line of pre';}if ($something) echo 'one conditional line of pre';if ($something)echo 'one conditional line of pre';echo 'a NON-conditional line of pre'; // this line gets executed regardless of the value of $something?>

然后您还可以编写if-else的替代语法：

<?phpif ($something):   echo 'one conditional line of pre';   echo 'another conditional line of pre';elseif ($somethingElse):   echo 'one conditional line of pre';   echo 'another conditional line of pre';else:   echo 'one conditional line of pre';   echo 'another conditional line of pre';endif;?>

使用备用语法，您也可以退出解析模式，如下所示：

<?phpif ($something):?>one conditional line of pre<br />another conditional line of pre<?phpelse:   echo "it's value was: $value<br />n";?>another conditional line of pre<?phpendif;?>

但这真的很快就会变得凌乱，我不建议您使用它（除非用于模板逻辑）。

并使其完整：

<?php$result = $something ? 'something was true' : 'something was false';echo $result;?>equals<?phpif ($something) {   $result = 'something was true';} else {   $result = 'something was false';}echo $result;?>