插入数据库我的sql php(Inserting into database my sql php)
我试图在提交时将用户输入插入数据库。 我需要使用POSTBACK方法，但我遇到了问题。 当打开文本框下的注册页面时，它会说通知：未定义的变量：第147行的第一个名称：\ twa \ twa291 \ assignment1 \ rego.php
注意：未定义的变量：第147行的I：\ twa \ twa291 \ assignment1 \ rego.php中的中间名
注意：未定义的变量：第147行的I：\ twa \ twa291 \ assignment1 \ rego.php中的姓氏
注意：未定义的变量：第147行的I：\ twa \ twa291 \ assignment1 \ rego.php中的用户
ETC等等......
它是否必须等待用户输入？ 为什么会这样？ 这是我的代码：
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <link rel="stylesheet" type="text/css" href="stylesheet.css" /> <title>Registration</title> <script> function validateForm() { var x=document.forms["rego"]["gname"].value; if (x==null || x=="") { alert("Given name must be filled out"); return false; } var x=document.forms["rego"]["mname"].value; if (x==null || x=="") { alert("Middle name must be filled out"); return false; } var x=document.forms["rego"]["surname"].value; if (x==null || x=="") { alert("Surname must be filled out"); return false; } var x=document.forms["rego"]["username"].value; if (x==null || x=="") { alert("Username must be filled out"); return false; } var x=document.forms["rego"]["address"].value; if (x==null || x=="") { alert("Address must be filled out"); return false; } var x=document.forms["rego"]["postcode"].value; if (x==null || x=="") { alert("Postcode must be filled out"); return false; } var x=document.forms["rego"]["state"].value; if (x==null || x=="") { alert("State must be filled out"); return false; } var x=document.forms["rego"]["tel"].value; if (x==null || x=="") { alert("Telephone must be filled out"); return false; } var x=document.forms["rego"]["password"].value; if (x==null || x=="") { alert("Password must be filled out"); return false; } var x=document.forms["rego"]["passconfirm"].value; if (x==null || x=="") { alert("Confirmation of password must be filled out"); return false; } } </script> </head> <body> <div id="container"> <div id="header"> <h1>Registration</h1></div> <div id="menu"> <a href="home.php"><h2>Homepage</h2></a><br /> <a href="rego.php"><h2>Registration</h2></a><br /> <a href="userlogin.php"><h2>User Login</h2></a><br /> <a href="adminlogin.php"><h2>Administrator Login</h2></a><br /> <a href="tipping.php"><h2>Tipping</h2></a><br /> <a href="termsnconditions.php"><h2>Terms & Conditions</h2></a><br /> </div> <form id="rego" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="post" onSubmit="return validateForm()"> <label>Given Name:</label> <input type="text" name="gname"><br /> <br /> <label>Middle Name: </label><input type="text" name="mname"><br /> <br /> <label>Family Name:</label> <input type="text" name="surname"><br /> <br /> <label>Chosen Username:</label> <input type="text" name="username"><br /> <br /> <label>Address:</label> <input type="text" name="address"><br /> <br /> <label>Postcode: </label><input type="text" name="postcode"><br /> <br /> <label>State:</label> <input type="text" name="state"><br /> <br /> <label>Tel number: </label><input type="text" name="tel"><br /> <br /> <label>Password:</label> <input type="password" name="password"><br /> <br /> <label>Password confirmation:</label> <input type="password" name="passconfirm"><br /> <br />
<input type="submit" value="submit" name="submit"> </div> </form> <?php require_once("conn.php"); if (isset($_REQUEST["submit"])) { if (isset($_POST["submit"])) { $firstname = mysql_real_escape_string($_POST["gname"]); $middlename = mysql_real_escape_string($_POST["mname"]); $lastname = mysql_real_escape_string($_POST["surname"]); $user = mysql_real_escape_string($_POST["username"]); $addy = mysql_real_escape_string($_POST["address"]); $post = mysql_real_escape_string($_POST["postcode"]); $sta = mysql_real_escape_string($_POST["state"]); $telephone = mysql_real_escape_string($_POST["tel"]); $pass = mysql_real_escape_string($_POST["password"]); $systemuser= mysql_real_escape_string($_POST["susername"]); } } $sql = "INSERT INTO users(gname, mname, surname, username, address, postcode, state, tel, password) VALUES('$firstname', '$middlename', '$lastname', '$user', '$addy', '$post', '$sta', '$telephone', '$pass')"; $rs = mysql_query($sql, $conn); if (!$rs) { die('Problem with query' . mysql_error()); } echo "1 record added"; mysql_close($conn); ?> </body> </html>请注意：我知道正在删除mysql或类似的东西。 但我目前正在大学学习它，别无选择，只能去做。 我在一周内完成了这个主题，所以如果你能跟我一起去，那就太好了。 谢谢！
I am trying to insert user input into a database on submit. I am required to use POSTBACK method but i am having problems. When open the registration page under al the text boxes it is saying Notice: Undefined variable: firstname in I:\twa\twa291\assignment1\rego.php on line 147
Notice: Undefined variable: middlename in I:\twa\twa291\assignment1\rego.php on line 147
Notice: Undefined variable: lastname in I:\twa\twa291\assignment1\rego.php on line 147
Notice: Undefined variable: user in I:\twa\twa291\assignment1\rego.php on line 147
ETC ETC ETC....
Doesnt it have to wait for the user to input? Why is this happening? Here is my code:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <link rel="stylesheet" type="text/css" href="stylesheet.css" /> <title>Registration</title> <script> function validateForm() { var x=document.forms["rego"]["gname"].value; if (x==null || x=="") { alert("Given name must be filled out"); return false; } var x=document.forms["rego"]["mname"].value; if (x==null || x=="") { alert("Middle name must be filled out"); return false; } var x=document.forms["rego"]["surname"].value; if (x==null || x=="") { alert("Surname must be filled out"); return false; } var x=document.forms["rego"]["username"].value; if (x==null || x=="") { alert("Username must be filled out"); return false; } var x=document.forms["rego"]["address"].value; if (x==null || x=="") { alert("Address must be filled out"); return false; } var x=document.forms["rego"]["postcode"].value; if (x==null || x=="") { alert("Postcode must be filled out"); return false; } var x=document.forms["rego"]["state"].value; if (x==null || x=="") { alert("State must be filled out"); return false; } var x=document.forms["rego"]["tel"].value; if (x==null || x=="") { alert("Telephone must be filled out"); return false; } var x=document.forms["rego"]["password"].value; if (x==null || x=="") { alert("Password must be filled out"); return false; } var x=document.forms["rego"]["passconfirm"].value; if (x==null || x=="") { alert("Confirmation of password must be filled out"); return false; } } </script> </head> <body> <div id="container"> <div id="header"> <h1>Registration</h1></div> <div id="menu"> <a href="home.php"><h2>Homepage</h2></a><br /> <a href="rego.php"><h2>Registration</h2></a><br /> <a href="userlogin.php"><h2>User Login</h2></a><br /> <a href="adminlogin.php"><h2>Administrator Login</h2></a><br /> <a href="tipping.php"><h2>Tipping</h2></a><br /> <a href="termsnconditions.php"><h2>Terms & Conditions</h2></a><br /> </div> <form id="rego" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="post" onSubmit="return validateForm()"> <label>Given Name:</label> <input type="text" name="gname"><br /> <br /> <label>Middle Name: </label><input type="text" name="mname"><br /> <br /> <label>Family Name:</label> <input type="text" name="surname"><br /> <br /> <label>Chosen Username:</label> <input type="text" name="username"><br /> <br /> <label>Address:</label> <input type="text" name="address"><br /> <br /> <label>Postcode: </label><input type="text" name="postcode"><br /> <br /> <label>State:</label> <input type="text" name="state"><br /> <br /> <label>Tel number: </label><input type="text" name="tel"><br /> <br /> <label>Password:</label> <input type="password" name="password"><br /> <br /> <label>Password confirmation:</label> <input type="password" name="passconfirm"><br /> <br />
<input type="submit" value="submit" name="submit"> </div> </form> <?php require_once("conn.php"); if (isset($_REQUEST["submit"])) { if (isset($_POST["submit"])) { $firstname = mysql_real_escape_string($_POST["gname"]); $middlename = mysql_real_escape_string($_POST["mname"]); $lastname = mysql_real_escape_string($_POST["surname"]); $user = mysql_real_escape_string($_POST["username"]); $addy = mysql_real_escape_string($_POST["address"]); $post = mysql_real_escape_string($_POST["postcode"]); $sta = mysql_real_escape_string($_POST["state"]); $telephone = mysql_real_escape_string($_POST["tel"]); $pass = mysql_real_escape_string($_POST["password"]); $systemuser= mysql_real_escape_string($_POST["susername"]); } } $sql = "INSERT INTO users(gname, mname, surname, username, address, postcode, state, tel, password) VALUES('$firstname', '$middlename', '$lastname', '$user', '$addy', '$post', '$sta', '$telephone', '$pass')"; $rs = mysql_query($sql, $conn); if (!$rs) { die('Problem with query' . mysql_error()); } echo "1 record added"; mysql_close($conn); ?> </body> </html>PLEASE NOTE: i understand that mysql is being removed or something like that. But i am currently studying it in University and have no choice but to do it. I finish the subject in a week so if you could please bear with me itll be great. Thank you!
原文：
更新时间：2022-02-14 18:02
最满意答案
数组（和所有其他javascript对象）的引用不是通过它们的值传递的。 因此在第一次调用时，数组被清空，因此下一个调用将接收一个空数组！ 因此，在这些函数中，您不应该更改作为参数传递的数组。 试试这个选择：
function reverseArray(theArray){ let tempArray = []; if(theArray){ let n = theArray.length; // use a local variable to tell which item from the array to move while(n){ // while there is still items in theArray to move tempArray.push(theArray[--n]); // decrement n and add its corresponding value to tempArray (here theArray is not altered at all) } } return tempArray; }Arrays (and all other javascript objects) are passed by their references not by their values. So in the first call the array is emptied so the next call will recieve an empty array! Thus in those function you should not alter the array passed as parametter. Try this alternative:
function reverseArray(theArray){ let tempArray = []; if(theArray){ let n = theArray.length; // use a local variable to tell which item from the array to move while(n){ // while there is still items in theArray to move tempArray.push(theArray[--n]); // decrement n and add its corresponding value to tempArray (here theArray is not altered at all) } } return tempArray; }
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