使用用户输入创建 PHP 乘法表
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Creating PHP multiplication table with user input
提问by user2975266
I am creating form where the user can input a integer and get the multiplications (1-10) of that number. Here is my web form for user input:
我正在创建表单，用户可以在其中输入一个整数并获得该数字的乘法 (1-10)。这是我用于用户输入的 Web 表单：
<html>
<head>
<title>Assignment 9.1</title>
</head>
<body bgcolor="black" text="white">
<form method="post" action="table.php"
<strong>Enter No:</strong>
<input type="text" name="num" size="10">
<input type="submit" value="Get Table">
</form>
</body>
</html>
The table I have created is this:
我创建的表是这样的：
<?php
$num = $_POST['num'];
if($num)
(
for ($i=1; $i<=10; $i++)
(
$mul = $num * $i;
echo "$num * $i = $mul<br>";
)
)
else
(
echo "Invalid Entry!";
)
?>
I am getting an error for the table. The error is for line 5 (FOR). I have no idea why I am getting this error. Can anyone Help?
我收到表格错误。错误是针对第 5 行 (FOR)。我不知道为什么会收到此错误。任何人都可以帮忙吗？
回答by Niet the Dark Absol
Blocks of code are marked with curly brackets { ... }, you are currently using parentheses ( ... )
代码块用大括号标记{ ... }，您当前使用的是圆括号( ... )
As far as I can tell, that's pretty much the only thing wrong with it. You might want to add a bit of validation:
据我所知，这几乎是它唯一的错误。您可能想要添加一些验证：
$num = isset($_POST['num']) ? intval($_POST['num']) : 0;
But that'd just a touch-up. The brackets are your actual problem.
但这只是一个修饰。括号是您的实际问题。
回答by Fabian Rivera
You need to use {} instead () in the forand if.
您需要在for和if 中使用 {} 代替 () 。
Like this:
像这样：
<?php
$num = $_POST['num'];
if($num)
{
for ($i=1; $i<=10; $i++)
{
$mul = $num * $i;
echo "$num * $i = $mul<br>";
}
}
else
{
echo "Invalid Entry!";
}
?>
Hope it helps you!
希望对你有帮助！
回答by user3329684
You are using parentheses when you should be using braces. Try this...
当您应该使用大括号时，您正在使用括号。尝试这个...
<?php
$num = $_POST['num'];
if($num)
{
for ($i=1; $i<=10; $i++)
{
$mul = $num * $i;
echo "$num * $i = $mul<br>";
}
}
else
{
echo "Invalid Entry!";
}
?>
回答by Ashish Verma
save the file as table.php and run working 100%
<html>
<head><title>Table</title></head>
<body>
<form action="" method="POST">
<center><input type="text" name="number" size="20" > </center> <br>
<center><input type="submit" name="table" value="get table"> </center>
</form>
</body>
</html>
<?php
$num=$_POST['number'];
if($num<=20)
{
for ($i=1; $i<=10; $i++)
{
$mul=$num*$i;
echo "<center>$mul </center><br>";
}
}
else
{
echo "<center>envalid entry</center>";
}
?><html>
<head><title>Table</title></head>
<body>
<form action="" method="POST">
<center><input type="text" name="number" size="20" > </center> <br>
<center><input type="submit" name="table" value="get table"> </center>
</form>
</body>
</html>
<?php
$num=$_POST['number'];
if($num<=20)
{
for ($i=1; $i<=10; $i++)
{
$mul=$num*$i;
echo "<center>$mul <br></center>";
}
}
else
{
echo "<center>envalid entry</center>";
}
?>
