http://www.mediawiki.org/wiki/Manual:Coding_conventions/PHP
assignment作为expression来用看起来像个错误
<span>//</span><span> No</span>
<span>if</span> ( <span>$a</span> =<span> foo() ) {
bar();
}</span><span>//</span><span> Yes</span>
<span>$a</span> =<span> foo();
</span><span>if</span> ( <span>$a</span><span> ) {
bar();
}</span>为提高代码可读性，Mediawiki大量使用空格
二元运算符
<span>//</span><span> No</span> <span>$a</span>=<span>$b</span>+<span>$c</span><span>; </span><span>//</span><span> Yes</span> <span>$a</span> = <span>$b</span> + <span>$c</span>;
函数名后面直接跟括号；括号内如有参数，两边都加空格
<span>//</span><span> Yes</span> <span>$a</span> = getFoo( <span>$b</span><span> ); </span><span>$c</span> = getBar();
控制结构 if while for foreach switch，关键字 catch，后面都有空格
<span>//</span><span> Yes</span>
<span>if</span><span> ( isFoo() ) {
</span><span>$a</span> = 'foo'<span>;
}
</span><span>//</span><span> No</span>
<span>if</span><span>( isFoo() ) {
</span><span>$a</span> = 'foo'<span>;
}</span>强制类型转换
<span>//</span><span> Yes</span> (int)<span>$foo</span><span>; </span><span>//</span><span> No</span> (int) <span>$bar</span><span>; ( int )</span><span>$bar</span><span>; ( int ) </span><span>$bar</span>;
注释
<span>//</span><span> Yes: Proper inline comment //No: Missing space</span>
三元运算符
除非表达式很短，否则用 If。记住一切都为了代码可读性。
"if" is English; ?: is not.
