PHP $_POST empty -- not working for local server using MAMP - php

Question

So currently, this is the code I have
index.php:
<form action="insert.php" method="post">
Comments:
<input type="text" name="comment">
<input type="submit">
</form>
insert.php:
<?php
include ('index.php');
$user = 'x';
$password = '';
$db = 'comment_schema';
$host = 'localhost';
$port = 3306;
/* Attempt MySQL server connection. Assuming you are running MySQL
server with default setting (user 'root' with no password) */
$link = mysqli_connect("localhost", "x", "", "comment_schema");
// Check connection
if($link === false){
die("ERROR: Could not connect. " . mysqli_connect_error());
}
// Escape user inputs for security
$comment = mysqli_real_escape_string($link, $_POST["comment"]);
$sql = "INSERT INTO parentComment(ID, Comment) VALUES('','$comment')";
// attempt insert query execution
if(mysqli_query($link, $sql)){
echo $comment;
} else{
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}
// close connection
mysqli_close($link);
When I do echo $comment, nothing gets printed out. However, if I do something like echo "hi" it works. I think for some reason the $_POST is not being recognized. Any suggestions to make this work or if I'm doing it wrong.
My goal is to take a user input and insert into a database on phpmyadmin. Currently, it is able to insert, however it inserts an empty value. I only have two columns in my database. An ID and a Comment column. The ID is auto incremented. The comment is what I get from the user.

Answer 1

Check Once what is your data type of comment in database.(I prefer Varchar()).
Try this as it is:-
<form action="insert.php" method="POST">
Comments:
<input type="text" name="comment"/>
<input type="submit" name="submit" value="submit">
</form>
<?php
include ('index.php');
$user = 'x';
$password = '';
$db = 'comment_schema';
$host = 'localhost';
$port = 3306;
$link = mysqli_connect("localhost", "x", "", "comment_schema");
if($link === false){
die("ERROR: Could not connect. " . mysqli_connect_error());
}
$comment = mysqli_real_escape_string($link, $_POST["comment"]);
$sql = "INSERT INTO parentComment(ID, Comment) VALUES('','$comment')";
if(mysqli_query($link, $sql)){
echo $comment;
} else{
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}
// close connection
mysqli_close($link);

Answer 2

try this
<?php
$user = 'x';
$password = '';
$db = 'comment_schema';
$host = 'localhost';
$link = mysqli_connect($host, $user, $password, $db);
if($link === false){
die("ERROR: Could not connect. " . mysqli_connect_error());
}
// Escape user inputs for security
$comment = mysqli_real_escape_string($link, $_POST["comment"]);
$sql = "INSERT INTO parentComment(ID, Comment) VALUES(NULL,'$comment')";
// attempt insert query execution
if(mysqli_query($link, $sql)){
echo $comment;
} else{
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}
// close connection
mysqli_close($link);

Answer 3

Use below code:-
include ('index.php');
$user = 'x';
$password = '';
$db = 'comment_schema';
$host = 'localhost';
$port = 3306;
$link = mysqli_connect("localhost", "x", "", "comment_schema");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
if(!empty($_POST["comment"])){
$comment = mysqli_real_escape_string($link, $_POST["comment"]);
// Escape user inputs for security
$sql = "INSERT INTO parentComment(ID, Comment) VALUES('','$comment')";
$result = mysqli_query($link, $sql);
// attempt insert query execution
if($result){
echo $comment;
} else{
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}
// close connection
mysqli_close($link);
}else{
die('comment is not set or not containing valid value');
}
Hope it will help you :-)

Answer 4

Some debugging suggestions:
var_dump($_POST); // before mysqli_real_escape_string
var_dump($comment); // after mysqli_real_escape_string
mysqli api may not work well! Fix the query like
$sql = "INSERT INTO parentComment(ID, Comment) VALUES('','".$comment."')";
echo $sql; // check your sql syntax
echo mysqli_error($link); // do you have error
Look at your .htaccess file see if you have <Limit POST> tag
Remove this line include ('index.php');. Supposedly, these two files are in one folder. So just run index.php . Tried your code without that line and it worked for me.