极客教程PHP 从MySQL数据库中删除数据
通过PHP函数执行SQL DELETE语句来删除MySQL表中的数据 mysql_query 。
下面是一个简单的示例，用于删除 employee 表中的记录。要删除任何表中的记录，需要使用条件语句来定位该记录。下面的示例使用主键来匹配employee表中的记录。
示例
尝试以下示例以了解删除操作。您需要提供一个员工ID来从employee表中删除员工记录。
<html>
<head>
<title>Delete a Record from MySQL Database</title>
</head>
<body>
<?php
if(isset(_POST['delete'])) {dbhost = 'localhost:3036';
dbuser = 'root';dbpass = 'rootpassword';
conn = mysql_connect(dbhost, dbuser,dbpass);
if(! conn ) {
die('Could not connect: ' . mysql_error());
}emp_id = _POST['emp_id'];sql = "DELETE FROM employee WHERE emp_id = emp_id" ;
mysql_select_db('test_db');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>
</html>