PHP 编码规范(19)
7.2 空格
下列情况应该使用空格:
- 一个紧跟着括号的关键字应该被空格分开,例如:
while ( true ) {
...
}
注意:空格不应该置于方法名与其左括号之间。这将有助于区分关键字和方法调用。
- 空白应该位于参数列表中逗号的后面
- 所有的二元运算符,除了".",应该使用空格将之与操作数分开。一元操作符和操作数之间不因该加空格,比如:负号("-")、自增("++")和自减("--")。例如:
$a += $c + $d;
$a = ( $a + $b ) / ( $c * $d );
while ( $d++ = $s++ ) {
$n++;
}
printSize( "size is " + $foo + "
" );
- for语句中的表达式应该被空格分开,例如:
for (expr1; expr2; expr3)
- 强制转型后应该跟一个空格,例如:
myMethod( (byte) $aNum, (int) $x );
myMethod( (int) ($cp + 5 ), ( (int) ($i + 3)) + 1 );

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