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Home Backend Development PHP Tutorial 关于怎么获取循环语句中的值 的问题求解答

关于怎么获取循环语句中的值 的问题求解答

Jun 23, 2016 pm 02:19 PM

for($i = 0; $i <= 2; $i++){  $i;}   echo $i;
Copy after login

这样为什么不能获取获取循环的出来的值 就这能获取最后一条 修改成这样的话
for($i = 0; $i <= 2; $i++){    echo $i;} 
Copy after login

这样就能获取全部得值 但是有的语句不想放到循环语句中 有什么办法能获取到循环语句中的值吗


回复讨论(解决方案)

在循环语句中用个变量(数组或字符)保存每次循环的值,在循环外面调用。

没保存起来,当然每次都是获取最后一个。

楼主这是你的需求的逻辑有问题

语句放在循环外,这没问题,但是循环外的语句又如何用循环内特定某一次循环的数值呢? 你如何判断该用哪一次?

楼主这是你的需求的逻辑有问题

语句放在循环外,这没问题,但是循环外的语句又如何用循环内特定某一次循环的数值呢? 你如何判断该用哪一次?
我也是觉得 逻辑有问题 其实我想在循环语句外获取循环语句内边的所以值 但是没什么思路和代码不知道要怎么写

在循环语句中用个变量(数组或字符)保存每次循环的值,在循环外面调用。
这个方法可行 但是具体的代码要怎么写 求高手写出代码 让菜鸟参考一下

for($i = 0; $i <= 2; $i++){  $t[] = $i;} echo join(',', $t);
Copy after login


楼主这是你的需求的逻辑有问题

语句放在循环外,这没问题,但是循环外的语句又如何用循环内特定某一次循环的数值呢?  你如何判断该用哪一次?
我也是觉得 逻辑有问题 其实我想在循环语句外获取循环语句内边的所以值 但是没什么思路和代码不知道要怎么写

那你先想好逻辑和流程,编程其实就是把逻辑转化为代码...也可以说详细点大家可以帮你梳理下逻辑   

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