摘要:
1. if语句 ```php $a = 2; $b = 1; if($a>$b){ echo "a大于b"; } ``` 输出:a大于b 2.if...else语句 ```php $a = 1; $b = 2; if($a>$b){ echo "a大于b"; }else{ echo "a不大于b"; 阅读全文
摘要:
1. 加、减、乘、除、负数 ```php $a = 10; $b = 1; echo $a+$b.""; echo $a-$b.""; echo $a*$b.""; echo $a/$b.""; echo -$a; ``` 输出:11 9 10 10 -10 2. 逻辑运算(与、或、非、异或) `` 阅读全文