php +检查变量值是否在两个整数之间

Question

我是新手,我认为我的if-else结构存在一些问题,但我无法理解问题实际上是什么.

我正在尝试执行以下操作:

<?php

$num = 1; 

while($num <=10)
{
    if ($num < 4)
    {
    print $num . " is less than 4 /";
    } 
    elseif ($num = 4)
    {
    print $num . " is just 4 /";
    } 
    elseif (($num > 4) && ($num < 10))
    {
    print $num . " is more than 4 and less than 10 /";
    } 
    elseif ($num = 10)
    {
    print $num . " is just 10 /";
    } 

 $num++; 

}

？>

我有几个小时左右,所以我终于决定问.任何帮助将不胜感激!Ty提前阅读.

Answer 1

您正在使用赋值运算符'=',使用条件运算符

<?php

$num = 1; 

    while($num <=10)
    {
        if ($num < 4)
        {
        print $num . " is less than 4 /";
        } 
        elseif ($num == 4)
        {
        print $num . " is just 4 /";
        } 
        elseif (($num > 4) && ($num < 10))
        {
        print $num . " is more than 4 and less than 10 /";
        } 
        elseif ($num == 10)
        {
        print $num . " is just 10 /";
        } 

     $num++; 

    }
?>