我试图在表中显示mysql数据库中的行，但我无法在html中显示PHP。这是我的代码：
<?php
$connection = mysql_connect("localhost","root","")
or die("no connection");
$db_select=mysql_select_db("smqr",$connection)
or die("no connection to db");
$query= ("SELECT * FROM seafood");
$result=mysql_query($query)or die(mysql_error());
while
($row =mysql_fetch_array($result)):
$recipe=$row['recipe'];
$usrtext=$row['usrtext'];
$usrtxt=$row['usrtxt'];
endwhile;
?>
<body bgcolor="#ffccff">
<table align="center" width="780" height="100%" bgcolor="lightgrey" border="1">
<thead>
</thead>
<tbody>
<tr>
<th height="220">
<img src="seafoods.jpg" width="100%" height="220" /></th></tr>
<tr>
<th>Recipe Name <p>
<? echo "$recipe" ?></p></th></tr>
<tr>
<th>Ingrediants and Measurements
<p><? echo $usrtext ?></p></th></tr>
<tr>
<th>Instructions
<p> <? echo $usrtxt ?></p></th>
</tr>
我想我必须在while循环中回显该表，我尝试了回显表，但它不起作用，所以我尝试在html中添加PHP，这就是我发布的内容。当我在结束前回显$recipe时，它会显示信息，但我需要它在表中。
尝试这个
<table align="center" width="780" height="100%" bgcolor="lightgrey" border="1">
<tr>
<td>Recipe Name </td>
<td>Ingrediants and Measurements</td>
<td>Instructions</td>
</tr>
<?php
$connection = mysql_connect("localhost","root","")or die("no connection");
$db_select=mysql_select_db("smqr",$connection) or die("no connection to db");
$query= ("SELECT * FROM seafood");
$result=mysql_query($query)or die(mysql_error());
while($row=mysql_fetch_array($result))
{
$recipe=$row['recipe'];
$usrtext=$row['usrtext'];
$usrtxt=$row['usrtxt'];
?>
<tr>
<td><?=$recipe?></td>
<td><?=$usrtext?></td>
<td><?=$usrtxt?></td>
</tr>
<?php
}// End while
?>
</table>
检查php设置文件中是否启用了php短标记。如果没有，你就不能使用<?，你必须使用<?php
示例：
<?php echo $usrtext ?>
同时while循环在显示表之前结束。在显示结束后结束while循环。
通过添加像这样重写代码
<?php ?> instead of <? ?>
<?php
$connection = mysql_connect("localhost","root","")
or die("no connection");
$db_select=mysql_select_db("test",$connection)
or die("no connection to db");
$query= ("SELECT * FROM profile");
$result=mysql_query($query)or die(mysql_error());
while
($row =mysql_fetch_array($result)):
$recipe=$row['recipe'];
$usrtext=$row['usrtext'];
$usrtxt=$row['usrtxt'];
endwhile;
?>
<body bgcolor="#ffccff">
<table align="center" width="780" height="100%" bgcolor="lightgrey" border="1">
<thead>
</thead>
<tbody>
<tr>
<th height="220">
<img src="seafoods.jpg" width="100%" height="220" /></th></tr>
<tr>
<th>Recipe Name <p>
<?php echo "$recipe" ?></p></th></tr>
<tr>
<th>Ingrediants and Measurements
<p><?php echo $usrtext ?></p></th></tr>
<tr>
<th>Instructions
<p> <?php echo $usrtxt ?></p></th>
</tr>
$recipe、$usrtext和$usrtxt都是在while循环的本地范围内定义的，因此它们在"endwhile；"之后将不再存在
<?
//define variables outside the while loop
$recipe;
$usrtext;
$usrtxt;
while($row =mysql_fetch_array($result)):
$recipe=$row['recipe'];
$usrtext=$row['usrtext'];
$usrtxt=$row['usrtxt'];
endwhile;
?>
<body bgcolor="#ffccff">
<table align="center" width="780" height="100%" bgcolor="lightgrey" border="1">
<thead>
</thead>
<tbody>
<tr>
<th height="220">
<img src="seafoods.jpg" width="100%" height="220" />
</th>
</tr>
<tr>
<th>
Recipe Name
<p> <? echo $recipe ?></p>
</th>
</tr>
<tr>
<th>
Ingrediants and Measurements
<p><? echo $usrtext ?></p>
</th>
</tr>
<tr>
<th>
Instructions
<p> <? echo $usrtxt ?></p>
</th>
</tr>
</table>
</body>
您可以这样做。
...
while($row = mysql_fetch_array($result)) {
?>
<table align="center" width="780" height="100%" bgcolor="lightgrey" border="1">
<thead>
</thead>
<tbody>
<tr>
<th height="220">
<img src="seafoods.jpg" width="100%" height="220" />
</th>
</tr>
<tr>
<th>Recipe Name <p>
<?php echo $row['recipe']; ?></p>
</th>
</tr>
<tr>
<th>Ingrediants and Measurements
<p><?php echo $row['usrtxt']; ?></p>
</th>
</tr>
<tr>
<th>Instructions
<p><?php echo $row['usrtxt']; ?></p>
</th>
</tr>
</tbody>
</table>
<?php } ?>
如果您的查询结果返回多行，那么您很可能正在寻找这样的东西：
<?php
$connection = mysql_connect("localhost", "root", "") or die("no connection");
$db_select = mysql_select_db("smqr", $connection) or die("no connection to db");
$query = "SELECT * FROM seafood";
$result = mysql_query($query) or die(mysql_error());
?>
<body bgcolor="#ffccff">
<table align="center" width="780" bgcolor="lightgrey" border="1">
<thead>
<tr>
<th>Recipe Name</th>
<th>Ingrediants and Measurements</th>
<th>Instructions</th>
</tr>
</thead>
<tbody>
<?php while ($row = mysql_fetch_array($result)): ?>
<tr>
<td><?php echo $row['recipe']; ?></td>
<td><?php echo $row['usrtext']; ?></td>
<td><?php echo $row['usrtxt']; ?></td>
</tr>
<?php endwhile; ?>
</tbody>
</table>
</body>
注意：如果以上代码对您有效，请仔细遵循我对您的代码所做的更改。希望这将帮助您学习编写更好的代码。：）
您的代码包含一些不好的东西，首先，您不应该使用<? ?>，我甚至不知道这在某个地方是否有效。使用<?= ?>或<?php echo ?>（但使用<?php，因为它更兼容
其次，使用PDO库代替MySQL是个好主意，它更安全、更容易、更灵活、更兼容，请使用本教程。
现在，你可以试试这个：
<?php
$connection = mysql_connect("localhost","root","")
or die("no connection");
$db_select=mysql_select_db("smqr",$connection)
or die("no connection to db");
$query= ("SELECT * FROM seafood");
$result=mysql_query($query)or die(mysql_error());
?>
<table>
<?php
while($row=mysql_fetch_array($result)): // everything between "while():" and "endwhile;" will be outputted in a cycle
?>
<tr>
<td>
<?php echo $row['recipe']; ?>
</td>
<td>
<?php echo $row['usrtext']; ?>
</td>
<td>
<?php echo $row['usrtxt']; ?>
</td>
</tr>
<?php endwhile; ?>
</table>
这被称为内联编码