制御構造
制御構造には、if, for, while, switch 等があります。
最も複雑な制御構造である if 文の例を示します。
<?php
if ((condition1) || (condition2)) {
action1;
} elseif ((condition3) && (condition4)) {
action2;
} else {
defaultaction;
}
?>
制御構造では、関数コールと区別するために、
制御キーワードと開きカッコの間に空白を 1 つ置きます。
構文的に省略可能な場合でも、波カッコを使用することを推奨します。
波カッコを付けることにより可読性が向上し、
新しく行を追加した際に論理的なエラーが紛れこむ可能性が減少します。
switch 文の場合は次のようにします。
<?php
switch (condition) {
case 1:
action1;
break;
case 2:
action2;
break;
default:
defaultaction;
break;
}
?>
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Last updated: Sun, 21 Jun 2009 |
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| User Notes: |
Note by: bobvandell@hotmail.com
I'm with Maga on this one. That's how I've been doing it for years.
Indent from the case so that the case it's self stands out.
My strong belief is still that this would add a nice way to represent loops...
switch (condition)
{
case 1;
action 1;
break1;
case 2;
action 2;
break2;
}
This makes the system much more readable and easy to understand. Every indent specifies a child. and two indents is especially useful when you are reading about 100 lines of code. It truely helps!
Note by: Maga
I think that better is:
<?php
switch (condition)
{
case 1:
action1;
break;
case 2:
action2;
break;
default:
defaultaction;
break;
}
Indentation+Brakes
?>
Phil, the indentation like in your example (i.e. with 4 spaces for the "case" statements) is also accepted in the PEAR coding standards.
Note by: phil@signalz.com
I would have expected more indentation, like this
<?php
switch (condition) {
case 1:
action1;
break;
case 2:
action2;
break;
default:
defaultaction;
break;
}
?>
Note by: dpn12@comcast.net
Might you consider adding to your current K&R format, below
...
switch (condition) {
case 1:
action1;
break;
case 2:
action2;
break;
}
...
/**/
...
switch (condition)
{
case 1:
action1;
break;
case 2:
action2;
break;
}
...
this above format that some believe to be more readable?
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