php - PHP POST表单验证错误

Question

我有一个 HTML 表单：

  <div id="registration">
  <p> SGU is for youth who have completed 6th through 12th grades. Please complete this entire form for EACH CAMPER. (<a href="PDFs/SGU_Registration_Form_2013.pdf">Download Form to Print</a>)<br />
  <br />
  * Denotes required field</p>
  <form action="form-to-email.php" method="post" name="camper_registration" id="camper registration">

  <label>Last Name*: </label>
  <input name="lastname" type="text" id="lastname" required="required"/>
  <br />
  <label>First Name*: </label><input name="firstname" type="text" id="firstname" required="required"/><br />
  <label>Middle Initial: </label><input type="text" name="initial" size=1 maxlength=1 /><br /><br />

  <label>Street Address*: </label><input name="streetaddress" type="text" id="streetaddress" required="required"/><br />
  <label>Address Line 2: </label><input type="text" name="addressline2" /><br />
  <label>City*: </label><input name="city" type="text" id="city" required="required"/><br />
  <label>State/Province/Region*: </label><input name="state" type="text" id="state" required="required"/><br />
  <label>Zipcode*: </label>
  <INPUT NAME="zip" input type="tel" SIZE=5 MAXLENGTH=5
     onKeyPress="return numbersonly(this, event)" required="required"><br /><br />
  <label>Youth's Email*: </label><input type="email" name="email" id="email" required="required"/><br /><br />
  <label>Youth's Cell*: </label>(<input type="tel" name="youth_area" size="3" maxlength="3" onKeyPress="return numbersonly(this, event)" required="required" />) <input type="tel" name="youth_phone" size="7" maxlength="7" onKeyPress="return numbersonly(this, event)" required="required" /><SCRIPT TYPE="text/javascript">
  <!--
  autojump("youth_area", "youth_phone", 3);
  //-->
  </SCRIPT><br /><br />
  <label>Date of Birth*: </label><INPUT NAME="month" input type="tel" SIZE=2 MAXLENGTH=2
     onKeyPress="return numbersonly(this, event)" required="required">/
     <INPUT NAME="day" input type="tel" SIZE=2 MAXLENGTH=2
     onKeyPress="return numbersonly(this, event)" required="required">/
     <INPUT NAME="year" input type="tel" SIZE=4 MAXLENGTH=4
     onKeyPress="return numbersonly(this, event)" required="required">
      <SCRIPT TYPE="text/javascript">
      autojump("month", "day", 2); autojump("day", "year", 2);
      </SCRIPT><br /><br />
  <label>Grade completed in<br /> Spring 2013*: </label><input type="tel" name="grade" size=2 maxlength=2 required="required"/><br /><br />
  <label>Gender*:</label><input type="radio" name="gender" value="Male" required="required"> Male
  <input type="radio" name="gender" value="Female" required="required"> Female
  <br /> <br />
  <label>Parent/Guardian(s) First Name*: </label><input name="guardian_first" type="text" id="guardian_first" required="required"/><br /><br />
  <label>Parent/Guardian(s) Last Name*: </label><input name="guardian_last" type="text" id="guardian_last" required="required"/> <br /><br />
  <label>Parent Phone*: </label>(<INPUT NAME="areacode" input type="tel" SIZE=3 MAXLENGTH=3
     onKeyPress="return numbersonly(this, event)" required="required">)<INPUT NAME="cellphone" input type="tel"SIZE=7 MAXLENGTH=7
     onKeyPress="return numbersonly(this, event)" required="required"><br />
     <SCRIPT TYPE="text/javascript">
  <!--
  autojump("areacode", "cellphone", 3);
  //-->
  </SCRIPT>
  <label>Parent/Guardian Email*: </label><input name="parent_email" type="email" id="parent_email" required="required"/><br />
  <b>This email will be used for confirmation of <br />
  registration and all future contact</b><br /><br />
  <label>1st Emergency Contact*: </label><input name="emergency_contact_1" type="text" id="emergency_contact_1" required="required"/><br />
  <label>Contact Number*: </label>(<INPUT NAME="emergency_contact_1_areacode" input type="tel" SIZE=3 MAXLENGTH=3
     onKeyPress="return numbersonly(this, event)" required="required">)<INPUT NAME="emergency_contact_1_phone" input type="tel"SIZE=7 MAXLENGTH=7
     onKeyPress="return numbersonly(this, event)" required="required"><br /><br />
     <SCRIPT TYPE="text/javascript">
  <!--
  autojump("emergency_contact_1_areacode", "emergency_contact_1_phone", 3);
  //-->
  </SCRIPT>
  <label>2nd Emergency Contact*: </label><input name="emergency_contact_2" type="text" id="emergency_contact_2" required="required"/><br />
  <label>Contact Number*: </label>(<INPUT NAME="emergency_contact_2_areacode" input type="tel" SIZE=3 MAXLENGTH=3
     onKeyPress="return numbersonly(this, event)" required="required">)<INPUT NAME="emergency_contact_2_phone" input type="tel"SIZE=7 MAXLENGTH=7
     onKeyPress="return numbersonly(this, event)" required="required"><br /><br />
        <SCRIPT TYPE="text/javascript">
  <!--
  autojump("emergency_contact_2_areacode", "emergency_contact_2_phone", 3);
  //-->
  </SCRIPT>
  <label>Name of Home Church: </label><input type="text" name="home_church" /><br />
  <label>Phone Number: </label>(<INPUT NAME="church_areacode" input type="tel" SIZE=3 MAXLENGTH=3
     onKeyPress="return numbersonly(this, event)">)<INPUT NAME="church_phone" input type="tel"SIZE=7 MAXLENGTH=7
     onKeyPress="return numbersonly(this, event)"><br />
        <SCRIPT TYPE="text/javascript">
  autojump("church_areacode", "church_phone", 3);
  </SCRIPT>
  <label>Contact Person: </label><input type="text" name="contact_person" /><br /><br /> 
  <b>Special Needs</b><br />
  Some campers may have needs that might require special attention from our staff; accessibility, health concerns, diet, allergies, etc. <br /><br />
  <label>Please list any special needs: </label>
  <textarea rows="10" cols="20" name="special_needs">
  </textarea> <br /><br />
  <label>T-Shirt Size*: </label><input type="radio" name="shirt size" value="Small" required="required"> Small
  <input type="radio" name="shirt size" value="Medium" required="required"> Medium
  <input type="radio" name="shirt size" value="Large" required="required"> Large
  <input type="radio" name="shirt size" value="XL" required="required"> XL
  <input type="radio" name="shirt size" value="2XL" required="required"> 2XL<br /><br />
  <b>Roommate</b><br />
  There are double and many single occupancy dorm rooms at Grinnell college campus - if possible we will honor your request for ONE preferred roommate.<br /><br />
  <label>Roommate Preference: </label>
  <input type="text" name="roommate" /><br /><br />
  <div id="satellites">
        <p><b>Satellite Choices</b>
          List your first, second, and third choices.  You will be given your first choice if it is not full.  ALL events have limited capacity. If you do not choose a satellite, one will be assigned for you.<br /><br />
          <label>First Choice*: </label>
          <select name="satellite1" id="satellite1" required="required" onchange="clearOthers()">
            <option value="" disabled>Select</option>
            <option value="art">Art</option>
            <option value="basketball">Basketball</option>
            <option value="dance">Dance</option>
            <option value="drama">Drama</option>
            <option value="football">Football</option>
            <option value="missions">Missions</option>
            <option value="photo1">Landscape & Still Life Photography</option>
            <option value="photo2">People Photography</option>
            <option value="scrap-booking">Scrap-Booking</option>
            <option value="sgjr">Summer Games Jr. Training</option>
            <option value="soccer">Soccer</option>
            <option value="ultimate">Ultimate Frisbee</option>
            <option value="video_games">Video Games</option>
            <option value="volleyball">Volleyball</option>
            <option value="water_park">Water Park</option>
          </select><br />


          <label>Second Choice*: </label>
          <select name="satellite2" id="satellite2" required="required">
            <option value="" disabled>Select</option>
            <option value="art">Art</option>
            <option value="basketball">Basketball</option>
            <option value="dance">Dance</option>
            <option value="drama">Drama</option>
            <option value="football">Football</option>
            <option value="missions">Missions</option>
            <option value="photo1">Landscape & Still Life Photography</option>
            <option value="photo2">People Photography</option>
            <option value="scrap-booking">Scrap-Booking</option>
            <option value="sgjr">Summer Games Jr. Training</option>
            <option value="soccer">Soccer</option>
            <option value="ultimate">Ultimate Frisbee</option>
            <option value="video_games">Video Games</option>
            <option value="volleyball">Volleyball</option>
            <option value="water_park">Water Park</option>
          </select><br />



          <label>Third Choice*: </label>
          <select name="satellite3" id="satellite3" required="required">
            <option value="" disabled>Select</option>
            <option value="art">Art</option>
            <option value="basketball">Basketball</option>
            <option value="dance">Dance</option>
            <option value="drama">Drama</option>
            <option value="football">Football</option>
            <option value="missions">Missions</option>
            <option value="photo1">Landscape & Still Life Photography</option>
            <option value="photo2">People Photography</option>
            <option value="scrap-booking">Scrap-Booking</option>
            <option value="sgjr">Summer Games Jr. Training</option>
            <option value="soccer">Soccer</option>
            <option value="ultimate">Ultimate Frisbee</option>
            <option value="video_games">Video Games</option>
            <option value="volleyball">Volleyball</option>
            <option value="water_park">Water Park</option>
        </select>
  <script type="text/javascript">
  function clearOthers() {
    document.getElementById("secondchoice").options.selectedIndex=0;
    document.getElementById("thirdchoice").options.selectedIndex=0;
  }
  </script>    
    </div>

然后用这个 PHP 处理它：

     <?php
    if($_SERVER['REQUEST_METHOD'] !== 'POST')
    {
        //This page should not be accessed directly. Need to submit the form.
        echo "error; you need to submit the form!";
        die;
    }


    $firstname = $_POST['firstname']; $lastname = $_POST['lastname']; $initial = $_POST['initial']; $streetaddress = $_POST['streetaddress']; $addressline2 = $_POST['addressline2']; $city = $_POST['city']; $state = $_POST['state']; $zip = $_POST['zip']; $email = $_POST['email']; $month = $_POST['month']; $day = $_POST['day']; $year = $_POST['year']; $grade = $_POST['grade']; $gender = $_POST['gender']; $guardian_first = $_POST['guardian_first']; $guardian_last = $_POST['guardian_last']; $areacode = $_POST['areacode']; $cellphone = $_POST['cellphone']; $contact1 = $_POST['emergency_contact_1']; $contact1areacode = $_POST['emergency_contact_1_areacode']; $contact1phone = $_POST['emergency_contact_1_phone']; $contact2 = $_POST['emergency_contact_2']; $contact2areacode = $_POST['emergency_contact_2_areacode']; $contact2phone = $_POST['emergency_contact_2_phone']; $homechurch = $_POST['home_church']; $churchareacode = $_POST['church_areacode']; $churchphone = $_POST['church_phone']; $contactperson = $_POST['contact_person']; $specialneeds = $_POST['special_needs']; $shirtsize = $_POST['shirt size']; $roommate = $_POST['roommate']; $firstchoice = $_POST['satellite1']; $secondchoice = $_POST['satellite2']; $thirdchoice = $_POST['satellite3']; $youth_area = $_POST['youth_area']; $youth_phone = $_POST['youth_phone']; 

    //Validate first


    /*
    Simple form validation
    check to see if required fields were entered
    */
    if ($_POST['firstname'] == "" || $_POST['lastname'] == "" || $_POST['streetaddress'] == "" || $_POST['city'] == "" || $_POST['state'] == "" || $_POST['zip'] == "" || $_POST['email'] == "" || $_POST['month'] == "" || $_POST['day'] == "" || $_POST['year'] == "" || $_POST['grade'] == "" || $_POST['gender'] == "" || $_POST['guardian_first'] == "" || $_POST['guardian_last'] == "" || $_POST['areacode'] == "" || $_POST['cellphone'] == "" || $_POST['emergency_contact_1'] == ""  || $_POST['emergency_contact_1_areacode'] == ""  || $_POST['emergency_contact_1_phone'] == ""  || $_POST['emergency_contact_2'] == ""  || $_POST['emergency_contact_2_areacode'] == ""  || $_POST['emergency_contact_2_phone'] == ""  || $_POST['shirt size'] == ""  || $_POST['satellite1'] == ""  || $_POST['satellite2'] == ""  || $_POST['satellite3'] == "" || $_POST['youth_area'] == "" || $_POST['youth_phone'] == "" ) {
            echo "Please fill in all required boxes. \n";
            var_dump($_POST);}
      else {


    $email_from = 'chris569x@gmail.com';//<== update the email address
    $email_subject = "New Registration"; 
    $email_body = "You have received a new registration.\n". 
    "Camper: $firstname $initial $lastname \n".
    "Address: $streetaddress \n".
    "$addressline2 \n".
    "$city, $state $zip \n".
    "Email: $email \n".
    "Date of Birth: $month/$day/$year \n".
    "Grade Completed: $grade \n".
    "Gender: $gender \n".
    "Youth Cell Phone: ($youth_area) $youth_phone \n".
    "Guardian: $guardian_first $guardian_last \n".
    "Guardian Cell Phone: ($areacode) $cellphone \n".
    "First Emergency Contact: $contact1  Contact Number: ($contact1areacode) $contact1phone \n".
    "Second Emergency Contact: $contact2  Contact Number: ($contact2areacode) $contact2phone \n".
    "Home Church: $homechurch Contact Number: ($churchareacode) $churchphone Contact Person: $contactperson \n".
    "Special Needs: $specialneeds \n".
    "T-Shirt Size: $shirtsize \n".
    "Roommate Preference: $roommate \n".
    "Satellite Preferences: 1.$firstchoice 2.$secondchoice 3.$thirdchoice \n".
    " \n";
    $to = "elaineknudtson@gmail.com,chris569x@gmail.com";//<== update the email address
    $headers = "From: $email_from \r\n";
    //Send the email!
    mail($to,$email_subject,$email_body,$headers);
    //done. redirect to thank-you page.
    header("Location: thanks2.htm",303);
    echo "<meta http-equiv='refresh' content='0; url=thanks2.htm'>";
    }
    ?> 

我包括了 var_dump，因为我不断收到“请填写所有必需的框”。错误。当我查看转储时，没有没有值的字符串。我很困惑，断开连接在哪里？

var_dump：

请填写所有必需的方框。array(38) { ["lastname"]=> string(4) "test" ["firstname"]=> string(4) "test" ["initial"]=> string(1) "t" ["streetaddress "]=> string(8) "123 test" ["addressline2"]=> string(4) "test" ["city"]=> string(9) "testville" ["state"]=> string(10 ) "测试状态" ["zip"]=> string(5) "12345" ["email"]=> string(13) "test@test.com" ["youth_area"]=> string(3) "123 " ["youth_phone"]=> string(7) "1234566" ["month"]=> string(2) "21" ["day"]=> string(2) "21" ["year"]=>字符串（4）“2121”[“等级”]=>

Answer 1

你错过了 if 中的下划线：

 if ($_POST['firstname'] == "" ||

$_POST['shirt size']应该是 shirt_size 。
                                                                         ^

---

这发生在你身上是因为你的方法不优雅，那个巨大If是讨厌的讨厌讨厌的 xD。

你应该看看foreach()学习循环遍历数组。还可以查看php 文档empty()并isset() 在其中查看，这些是您进行验证的第一批朋友。

---

它是如何制作的：

基本上为了搜索你的错误，我复制粘贴了你的 if 子句和 var_dumped 数组，对它们使用了一些正则表达式魔法，因此它们成为有效的 php 数组：

$arr = array("lastname"=>"test", "firstname"=>"test", "initial"=>"t", "streetaddress"=>"123 test", "addressline2"=>"test", "city"=>"testville", "state"=>"test state", "zip"=>"12345", "email"=>"test@test.com", "youth_area"=>"123", "youth_phone"=>"1234566", "month"=>"21", "day"=>"21", "year"=>"2121", "grade"=>"12", "gender"=>"Male", "guardian_first"=>"test test", "guardian_last"=>"test test", "areacode"=>"123", "cellphone"=>"1231231", "parent_email"=>"test@test.com", "emergency_contact_1"=>"test test", "emergency_contact_1_areacode"=>"123", "emergency_contact_1_phone"=>"1231231", "emergency_contact_2"=>"test testy", "emergency_contact_2_areacode"=>"123", "emergency_contact_2_phone"=>"1232132", "home_church"=>"church test", "church_areacode"=>"321", "church_phone"=>"6548976", "contact_person"=>"tester tests", "special_needs"=>"none. testing", "shirt_size"=>"XL", "roommate"=>"none", "satellite1"=>"drama", "satellite2"=>"photo1", "satellite3"=>"volleyball", "submit"=>"Submit");
$arr2 = array('firstname', 'lastname', 'streetaddress', 'city', 'state', 'zip', 'email', 'month', 'day', 'year', 'grade', 'gender', 'guardian_first', 'guardian_last', 'areacode', 'cellphone', 'emergency_contact_1', 'emergency_contact_1_areacode', 'emergency_contact_1_phone', 'emergency_contact_2', 'emergency_contact_2_areacode', 'emergency_contact_2_phone', 'shirt size', 'satellite1', 'satellite2', 'satellite3', 'youth_area', 'youth_phone');

下次请使用 var_export() 输出一个有效的 php 数组，人们可以复制粘贴它！！

然后我使用这个循环来确定它们是否匹配：

foreach($arr2 as $k=>$v){
    if(!array_key_exists($v, $arr)){
        echo "$v not in array 1 <br/>";
    }
}

输出：衬衫尺寸不在数组 1 中

享受！

Answer 2

<?php 
    if (isset($_POST['submit'])) {
         $firstname = $_POST['firstname'];
         $lastname  = $_POST['lastname'];

         if (empty($firstname == '' || $lastname == '')) {
             echo "empty";
         }
    }

?>

或类似的东西：

// Required field names
$required = array('login', 'password', 'confirm', 'name', 'phone', 'email');

// Loop over field names, make sure each one exists and is not empty
$error = false;
foreach($required as $field) {
  if (empty($_POST[$field])) {
    $error = true;
  }
}

if ($error) {
  echo "All fields are required.";
} else {
  echo "Proceed...";
}

Answer 3

请用

  if(empty($_POST['firstname']) && $_POST['firstname'])

代替 ：

  if($_POST['firstname']=="")

对于每个字段。您的数组非常大，您可能错过了任何字段，empty() 将检查它是否已设置，下一条语句将检查它是否为非零。更多关于空（）

希望它会有所帮助！