我有一个动态定义的下拉列表，定义如下:
$sql = "SELECT cat_id, disease_main FROM lists ORDER BY cat_id ASC";
foreach ($db->query($sql) as $row){//Array or records stored in $row
if($row['cat_id']==0.01){ // 0.01 = "---- Please Select ----" (empty value)
$dis_cat_main = "<option value='" . $row['cat_id'] . "'>" .
}else{
$dis_cat_main = "<option value='" . $row['cat_id'] . "'>" .
/* Option values are added by looping through the array */
}
}
我已将此代码放入 home.php 文件中:如下所示:
require('../../includes/config.inc.php');
require('../../includes/db_connection.php');
require('../../includes/functions.php');
// Second --> Let's 'Check whether user has the rights to see current page or not
if(!isLoggedIn()) //"isLoggedIn" is a pre-specified function in functions.php file
{
header('Location: ../index.php');
die();
}
// Define Page Title:
$page_title = 'Kardia: Add New Patient';
// $base_url= '';
include('../elements/layouts/header.html');
/*
Setup some variables/arrays: First we are creating a blank array called action and then setting an array value of result.
Result is going to hold a value of either success or error. Next we create another blank array called text.
This is going to hold any text we want to show the user during the signup.
*/
$action = array();
$action['result'] = null;
$text = array();
// Check if the form has been submitted:
if (($_SERVER['REQUEST_METHOD'] == 'POST') && isset($_POST['enroll'])) {
//let's define the variables involved, starting with the fields coming from the Demographics form
$pid = null; // this can be anything (MySQL will overwrite this value in any case)
$addmod_ts = date('Y-m-d H:i:s');
$address = $_POST['address'];
$age = isset($_POST['age']) ? $_POST['age'] : "999"; // ternary operator, in case Age has not been defined, default value will be 999
$censor_d = $_POST['censor_d'];
$city = $_POST['city'];
$clinic = $_POST['clinic'];
$death = isset($_POST['death']) ? $_POST['death'] : "0"; // ternary operator, assign deafult value of 0 ("No") to $death
$dis_cat_main = $_POST['dis_cat_main'];
$dis_cat_spec = $_POST['dis_cat_spec'];
$disease_1 = $_POST['disease_1'];
$disease_2 = $_POST['disease_2'];
$disease_3 = $_POST['disease_3'];
$disease_4 = $_POST['disease_4'];
$dob = $_POST['dob'];
$email_1 = $_POST['email_1'];
$email_2 = $_POST['email_2'];
$firstname = $_POST['firstname'];
$fup_months = isset($_POST['fup_months']) ? $_POST['fup_months'] : "999"; // ternary operator (deafult value: 999)
$fup_years = isset($_POST['fup_years']) ? $_POST['fup_years'] : "999"; // ternary operator (deafult value: 999)
$institution = $_POST['institution'];
$lastname = $_POST['lastname'];
$locked = $_POST['locked'];
$notes = $_POST['notes'];
$phone_1 = $_POST['phone_1'];
$phone_2 = $_POST['phone_2'];
$phone_3 = $_POST['phone_3'];
$physician = $_POST['physician'];
$province = $_POST['province'];
$pt_department = $_POST['pt_department'];
$pt_location = $_POST['pt_location'];
$recruit_ts = date('Y-m-d H:i:s');
$region = $_POST['region'];
$research = isset($_POST['research']) ? $_POST['research'] : "0"; // ternary Operator, defualt value: 0 ("No")
$saved = $_POST['saved'];
$sex = $_POST['sex'];
$specdis_1a = $_POST['specdis_1a'];
$specdis_1b = $_POST['specdis_1b'];
$ssn = $_POST['ssn'];
$study = $_POST['study'];
$zip = $_POST['zip'];
// In this case, let us start some basic, server-side, validation:
//Let us start basic validation: make sure everything required has been inserted
if (empty($lastname)){
$action['result'] = 'error'; array_push($text,'Please insert patient last name');
}
if (empty($firstname)){
$action['result'] = 'error'; array_push($text,'Please insert patient first name ');
}
if (!is_numeric ($sex)) {
$action['result'] = 'error'; array_push($text,'Please insert patient gender'); // SEX is a Number so must be treated accordingly (if empty does not work here)
}
if (empty($disease_1)){
$action['result'] = 'error'; array_push($text,'Please insert at least the first medical issue'); // Disease_1 is a Number so must be treated accordingly (if empty does not work here)
}
if (empty($address)){
$action['result'] = 'error'; array_push($text,'Please insert patient Address');
}
if (empty($city)){
$action['result'] = 'error'; array_push($text,'Please insert city name');
}
if (empty ($phone_1)){
$action['result'] = 'error'; array_push($text,'Please insert at least one valid phone number ');
}
if (empty($email_1)){
$action['result'] = 'error'; array_push($text,'Please insert at least one valid e-mail address');
}
// then let us define and validate DOB and put the date in SQL format
// Validate the Date of Birth (DOB)
if (empty($dob)){
$action['result'] = 'error'; array_push($text,'Please insert date of birth for patient');
}
// If all required data are present , in the correct format, and there are no errors, we can go ahead and enroll the patient:
if($action['result'] != 'error'){
// let's start a try/catch loop and submit the query via PDO prepared statement, using named placeholders
try {
// Finally, we can go ahead with the SQL INSERT query
$sql = 'INSERT INTO `demographics` ( PID,
ADDMOD_TS,
ADDRESS,
AGE,
CENSOR_D,
CITY,
CLINIC,
DEATH,
DIS_CAT_MAIN,
DIS_CAT_SPEC,
DISEASE_1,
DISEASE_2,
DISEASE_3,
DISEASE_4,
DOB,
EMAIL_1,
EMAIL_2,
FIRSTNAME,
FUP_MONTHS,
FUP_YEARS,
INSTITUTION,
LASTNAME,
LOCKED,
NOTES,
PHONE_1,
PHONE_2,
PHONE_3,
PHYSICIAN,
PROVINCE,
PT_DEPARTMENT,
PT_LOCATION,
RECRUIT_TS,
REGION,
RESEARCH,
SAVED,
SEX,
SPECDIS_1A,
SPECDIS_1B,
SSN,
STUDY,
ZIP
)
VALUES ( :pid,
NOW(),
:address,
:age,
:censor_d,
:city,
:clinic,
:death,
:dis_cat_main,
:dis_cat_spec,
:disease_1,
:disease_2,
:disease_3,
:disease_4,
:dob,
:email_1,
:email_2,
:firstname,
:fup_months,
:fup_years,
:institution,
:lastname,
:locked,
:notes,
:phone_1,
:phone_2,
:phone_3,
:physician,
:province,
:pt_department,
:pt_location,
NOW(),
:region,
:research,
:saved,
:sex,
:specdis_1a,
:specdis_1b,
:ssn,
:study,
:zip
)';
// a. Prepare the statement
$stmt = $db->prepare($sql);
// b. Bind values and variables
$stmt->bindParam(':pid' , $pid, PDO::PARAM_INT);
// ADDMOD_TS here, not to be bound (it is the NOW() MySQL function)
$stmt->bindParam(':address' , $address, PDO::PARAM_STR);
$stmt->bindParam(':age' , $age, PDO::PARAM_INT);
$stmt->bindParam(':censor_d' , $censor_d, PDO::PARAM_STR);
$stmt->bindParam(':city' , $city, PDO::PARAM_STR);
$stmt->bindParam(':clinic' , $clinic, PDO::PARAM_STR);
$stmt->bindParam(':death' , $death, PDO::PARAM_INT);
$stmt->bindParam(':dis_cat_main' , $dis_cat_main, PDO::PARAM_STR);
$stmt->bindParam(':dis_cat_spec' , $dis_cat_spec, PDO::PARAM_STR);
$stmt->bindParam(':disease_1' , $disease_1, PDO::PARAM_STR);
$stmt->bindParam(':disease_2' , $disease_2, PDO::PARAM_STR);
$stmt->bindParam(':disease_3' , $disease_3, PDO::PARAM_STR);
$stmt->bindParam(':disease_4' , $disease_4, PDO::PARAM_STR);
$stmt->bindParam(':dob' , $dob, PDO::PARAM_STR);
$stmt->bindParam(':email_1' , $email_1, PDO::PARAM_STR);
$stmt->bindParam(':email_2' , $email_2, PDO::PARAM_STR);
$stmt->bindParam(':firstname' , $firstname, PDO::PARAM_STR);
$stmt->bindParam(':fup_months' , $fup_months, PDO::PARAM_INT);
$stmt->bindParam(':fup_years' , $fup_years, PDO::PARAM_INT);
$stmt->bindParam(':institution' , $institution, PDO::PARAM_STR);
$stmt->bindParam(':lastname' , $lastname, PDO::PARAM_STR);
$stmt->bindParam(':locked' , $locked, PDO::PARAM_INT);
$stmt->bindParam(':notes' , $notes, PDO::PARAM_STR);
$stmt->bindParam(':phone_1' , $phone_1, PDO::PARAM_STR);
$stmt->bindParam(':phone_2' , $phone_2, PDO::PARAM_STR);
$stmt->bindParam(':phone_3' , $phone_3, PDO::PARAM_STR);
$stmt->bindParam(':physician' , $physician, PDO::PARAM_STR);
$stmt->bindParam(':province' , $province, PDO::PARAM_STR);
$stmt->bindParam(':pt_department' , $pt_department, PDO::PARAM_STR);
$stmt->bindParam(':pt_location' , $pt_location, PDO::PARAM_STR);
// RECRUIT_TS parameter here, not to be bound (it is the NOW() MySQL function
$stmt->bindParam(':region' , $region, PDO::PARAM_INT); // Numbered DropDown List
$stmt->bindParam(':research' , $research, PDO::PARAM_INT);
$stmt->bindParam(':saved' , $saved, PDO::PARAM_INT);
$stmt->bindParam(':sex' , $sex, PDO::PARAM_INT);
$stmt->bindParam(':specdis_1a' , $specdis_1a, PDO::PARAM_STR);
$stmt->bindParam(':specdis_1b' , $specdis_1b, PDO::PARAM_STR);
$stmt->bindParam(':ssn' , $ssn, PDO::PARAM_STR);
$stmt->bindParam(':study' , $study, PDO::PARAM_STR);
$stmt->bindParam(':zip' , $zip, PDO::PARAM_STR);
// Kick in the prepared statement
$stmt->execute();
} catch (PDOException $e) {
echo '<p class="error"> An Error Occurred: ' . $e->getMessage() . '</p>'; // Report the Error
}
// Tell the user we have done successfully
$action['result'] = 'success';
array_push($text,'Patient is on Kardia now');
}
但是当我尝试在 home.html 中定义以下字段(下拉列表)时:
<label for="dis_cat_main" </label>
<select name="dis_cat_main" id="dis_cat_main" title="disease Category">
<?php echo $disease_cat_main; ?>
</select>
我收到“ undefined variable dis_cat_main”错误消息。
任何人都可以帮助我了解如何解决这个问题吗？
非常感谢
最佳答案
将脚本放在此行的下方:<?php echo $disease_cat_main; ?>
sql = "SELECT cat_id, disease_main FROM lists ORDER BY cat_id ASC";
foreach($db - > query($sql) as $row) { //Array or records stored in $row
if ($row['cat_id'] == 0.01) { // 0.01 = "---- Please Select ----" (empty value)
echo "<option value='".$row['cat_id']."'>";
} else {
echo "<option value='".$row['cat_id']."'>";
/* Option values are added by looping through the array */
}
}
您的评论的解决方案:
sql = "SELECT cat_id, disease_main FROM lists ORDER BY cat_id ASC";
$dis_cat_main = "";
foreach($db - > query($sql) as $row) { //Array or records stored in $row
if ($row['cat_id'] == 0.01) { // 0.01 = "---- Please Select ----" (empty value)
$dis_cat_main .= "<option value='".$row['cat_id']."'>";
} else {
$dis_cat_main .= "<option value='".$row['cat_id']."'>";
/* Option values are added by looping through the array */
}
}
然后在您的 HTML 中:
<?php echo $dis_cat_main; ?>
只要两个 PHP 脚本位于同一页面上，就应该可以工作。
关于php - 带有 PDO 下拉列表的 undefined variable ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27656662/