循环不递增

问题描述

嘿我正在尝试为我的查询中的行数做一个循环。



$ query3 =SELECT * FROM carrinho where utilizador =' $ utilizador';

$ res1 = mysqli_query（$ lig，$ query3）;

$ num = mysqli_num_rows（$ res1）;





for（$ i = 0; $ i< $ num; $ i ++）{

$ query5 =SELECT * from carrinho其中id_carrinho ='$ i';

$ res3 = mysqli_query（$ lig，$ query5）;

$ num1 = mysqli_num_rows（$ res3）;



我尝试了什么：



我试图回显行数确定有行，它返回2.



但是当我尝试回显$ i时它返回0.

解决方案

Hey i'm trying to do a for cycle for the number of rows from my query.

$query3="SELECT * FROM carrinho where utilizador = '$utilizador'";
$res1=mysqli_query($lig,$query3);
$num = mysqli_num_rows($res1);


for ($i = 0; $i < $num; $i++) {
$query5 = "SELECT * from carrinho where id_carrinho = '$i'";
$res3=mysqli_query($lig,$query5);
$num1=mysqli_num_rows($res3);

What I have tried:

I tried to echo the number of rows to be sure there are rows, it returns 2.

But when i try to echo $i it returns 0.

解决方案

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