php基础——流程控制
顺序控制流程顺序就是自动的,不加任何控制的流程,从上到下执行分支控制(选择语句)if else选择if ( $a > $b ) { echo "a is bigger than b" ;} elseif ( $a == $b ) { echo "a is equal to b" ;} else { echo "a is smaller tha...