<?php
echo "数值大小比较:<br><br><br>";
$a =$_GET["a"];
$b =$_GET["b"];
if($a<$b){
echo "值a"," < ","值b<br>",$a," < ",$b;
}
if($a=$b){
echo "值a","  =  ","值b<br>",$a," = ",$b;}if($a>$b){
echo "值a"," > ","值b<br>",$a," > ",$b;}
?>谢谢 @读书顶个鸟用， @798340805，@自在鬼 的帮助 以上是代码问题：为什么a的值不能比b的大？？？？

1. a可以比b大！
@carey，

2. 可以a

3. 当a比b大时，只输出：
数值大小比较:<br><br><br>

4. @读书顶个鸟用，@自在鬼，    http://127.0.0.1/index.php?a=20&b=18 ______________________数值大小比较:


值a = 值b
18 = 18

5.

<?php
echo "数值大小比较:<br><br><br>";
$a =$_GET["a"];
$b =$_GET["b"];
if($a<$b){
echo "值a"," < ","值b<br>",$a," < ",$b;
}
if($a==$b){//这里出问题了！！
echo "值a","  =  ","值b<br>",$a," = ",$b;
}if($a>$b){
echo "值a"," > ","值b<br>",$a," > ",$b;}
?>

6. @Xily，谢谢，会了

7. ==是等于
＝是赋值

8. @雨伤，谢谢

9. 同7l