在语言结构（if，else，while，switch，for，foreach）中和类（class）、函数（function）、方法（method）中，左、右大括号必须单独占一行，与其声明处在相同的缩进级别。 例如: /* These are all wrong. */ if (condition) { while (condition2) { ... } } else { ... } /* These are right. */ if (condition) { while (condition2) { ... } } else { ... } /* These are all wrong. */ for ($i = 0;$i < $size;$i++) { ... } /* These are right. */ for ($i = 0;$i < $size;$i++) { ... } /* These are all wrong. */ while (condition) { ... } /* These are right. */ while (condition) { ... } /* These are all wrong. */ switch (condition) { case: 1 ... default: ... } /* These are right. */ switch (condition) { case: 1 ... default: ... } /* These are right. */ function do_stuff() { ... } /* These are right. */ class some_class { function a_method() { ... } }