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php - 通过 php 删除数据库中的数据时出错

转载 作者:行者123 更新时间:2023-11-29 13:38:51 25 4
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我试图通过 php 脚本从数据库中删除信息,但出现错误。
当我们输入员工ID时,该ID应该被删除。但是,它不会删除,并且出现错误。

<html>
<head>
<title>Delete a Record from MySQL Database</title>
</head>
<body>

<?php
if (isset($_POST['delete'])) {
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';
$conn = mysql_connect($dbhost, $dbuser, $dbpass);
if (!$conn) {
die('Could not connect: ' . mysql_error());
}

$emp_id = $_POST['emp_id'];

$sql = "DELETE employee " .
"WHERE emp_id = $emp_id";

mysql_select_db('test');
$retval = mysql_query($sql, $conn);
if (!$retval) {
die('Could not delete data: ' . mysql_error());
}
echo "Deleted data successfully\n";
mysql_close($conn);
} else { ?>
<form method="post" action="<?php $_PHP_SELF ?>">
<table width="400" border="0" cellspacing="1" cellpadding="2">
<tr>
<td width="100">Employee ID</td>
<td><input name="emp_id" type="text" id="emp_id"></td>
</tr>
<tr>
<td width="100"></td>
<td></td>
</tr>
<tr>
<td width="100"></td>
<td>
<input name="delete" type="submit" id="delete"
value="Delete">
</td>
</tr>
</table>
</form>
<?php } ?>
</body>

我得到的错误是:

Could not delete data: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE emp_id = 1' at line 1

最佳答案

正确的语法在这里:http://dev.mysql.com/doc/refman/5.0/en/delete.html

您需要说删除

$sql = "DELETE **from** employee ".
"WHERE emp_id = $emp_id" ;

关于php - 通过 php 删除数据库中的数据时出错,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18393728/

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