I am programming a page right now, and I am stuck with a problem.
The thing is that I am making a page, where you can answer all kind of question, but as it is possible to make new questions for that page, I am not able to keep a track of every input box, as it can't be something manual.
Let us say that i have the textboxes:
<input type="text" name="question_1" />
<input type="text" name="question_2" />
<input type="text" name="question_3" />
<input type="text" name="question_4" />
But as I add more questions from another page, with help from MySQL, there come new fields, for example:
<input type="text" name="question_5" />
<input type="text" name="question_6" />
<input type="text" name="question_7" />
As there can come unlimited questions, I cant really get their values by making PHP string like these:
$question1 = $_POST["question_1"];
$question2 = $_POST["question_2"];
$question3 = $_POST["question_3"];
and so on, because I can't know how many there are going to be made.
So my question is: Is it possible to get the value of every input box, which name is starting with "question_" and store them in a variable?
Thanks in advance, and sorry for my bad English :)
$i = 1;
$myarray = [];
while ($_POST["questions_".$i]) {
$i++;
array_push($myarray, $_POST["questions_".$i]);
}
Loop thru them until it's null. This pushes them to an array, but you could use them in the loop.
You can then generate a string from those too, for example a MySQL query:
$i = 1;
$firstpartofquery = "";
$secondpartofquery = "";
while ($_POST["questions_".$i]) {
$i++;
if ($firstpartofquery) { $firstpartofquery .= ", "; }
$firstpartofquery .= "question_" . $i;
if ($secondpartofquery) { $firstpartofquery .= ", "; }
$secondpartofquery .= "'" . $_POST["questions_".$i] . "'";
}
$myquery = "INSERT INTO question($firstpartofquery) VALUES($secondpartofquery)";
Just name you all of form's input elements as question[]
i.e
<input type="text" name="question[]" />
<input type="text" name="question[]" />
<input type="text" name="question[]" />
Then from your script you can loop through them, something like the following,:
$questions = $_POST['question'];
foreach ($questions as $question){
echo $question." <br /> \n";
}
This solution make life easier if you want to handle those fields on the client-side i.e via javascript or jquery for example, you will be able to handle them easily as:
<script>
questions = document.getElementsByName('question[]');
</script>
So by this way you have an array of all objects -fields- that contain your questions. As I think, that's the standard solution for handling multiple fields of the same entity in your forms.
Related
I'm working on a formular, but for the moment I just want to insert into an array my elements (I have books and authors).
I can display my books with author (name + surname) with the foreach, but I can't add more elements.
Here is the code with the form.
<H1>Exercice 2</H1>
<form method="POST">
<label for"code" >Number :</label>
<input id="code" name="code" type="number" />
<label for"title">Title :</label>
<input id="title" name="title" type="text" />
<label for"author" >Author :</label>
<input id="author" name="author" type="text" />
<button type="input" type="submit">Ok</button>
$title = $_POST['title'];
$code = $_POST['code'];
$author = $_POST['author'];
$book = array();
$book['code'] = 123;
$book['title'] = "Legendes";
$book['author'] = array("David", "Gemmel");
foreach($book as $value){
$book['key'] = $value;
var_dump($book);
if (is_array($value)) {
foreach($value as $otherValue) {
echo($otherValue);
}
} else {
echo($value);
}
}
I did some searcch, but I don't think it works, it's using the array_push() method with the POST, but I don't know where I can manipulate my form into the array.
If you want some details, I'll be happy to do that =) I'm working on it, if i have some news, you will know =)
Have a nice day =)
1) Assignments are in reverse. Correct way:
$myVar = $myValue
2) You need to set the name attribute in your inputs in order to be sent:
<input id="code" type="number" name="code" />
Then you can access them like:
$_POST['code']
3) To add an element by key in an array, use:
$array['key'] = $value;
Your Exercise 2 have some mistakes :
First, your HTML inputs must have the name attribute to be retrieved by post:
<h1>Exercice 2</h1>
<form method="post">
<label>
<input name="code" type="number" />
</label>
<button type="submit">Ok</button>
</form>
With PHP, you can access to any input value using the name:
$code = $_POST['code'];
Now, I think you want to "add" several books using this HTML form without a storage system. The problem is you can not do this if for every a new request since all the elements you have in your array will be deleted each time you run a new post request. To keep this information you need to use some persistent storage system as a database or others.
Since you seem to want to keep the information for each book together, you need to use a multidimensional array - hence, you'll need to redo the whole thing. Here's a suggestion:
Form:
<h2>Exercice 2</h2>
<form method="post">
<label for"code">Number :</label>
<input id="code" name="code" type="number">
<label for"title">Title :</label>
<input id="title" name="title" type="text">
<label for"author-firstname">Author First Name:</label>
<input id="author-firstname" name="author-firstname" type="text">
<label for "author-lastname">Author Last Name:</label>
<input id="author-lastname" name="author-lastname" type="text">
<input type="submit" name="submit_book" value="Ok">
</form>
Fixed the name-problems, changed the heading (you never, ever use H1 for a form, H1 is strictly used for the site-wide heading/logo/name of site). Also changed the button into a simple input type="submit".
$title = $_POST['title'];
$code = $_POST['code'];
$author = $_POST['author'];
$book = []; // changed this to modern PHP version array assignment
$book[0]['code'] = 123;
$book[0]['title'] = "Legendes";
$book[0]['author-firstname'] = "David";
$book[0]['author-lastname'] = "Gemmel"; // no reason to assign a separate array for first and last name, just use two array-keys
for ($c = 0; $c <= count($book); $c++) { //changed this to a for, counting the amount of entries in the $book array
echo 'Title: '.$book[$c]['title'];
echo 'Author: '.$book[$c]['author-firstname'].' '.$book[$c]['author-lastname'];
} // the content should probably be wrapped in a container of some sort, probably a <li> (and then a <ul>-list declared before the for-loop)
Now. None of this has anything to do with putting stuff INTO the array. That would be something like this (there isn't even a point of assigning the $_POST-variables for the code you posted. But, you can do something like this:
if (isset($_POST['submit_book'])) {
$title = $_POST['title'];
$code = $_POST['code'];
$author-firstname = $_POST['author-firstname'];
$author-lastname = $_POST['author-lastname'];
// however, if all you're doing is putting this into the array, no need to assigne the $_POST to variables, you can just do this:
$temp_array = ['code'=>$_POST['code'],'title'=>$_POST['title'],'author-firstname'=>$_POST['author-firstname'],'author-lastname'=>$_POST['author-lastname']];
$book[] = $temp_array;
}
So, that would replace the assigned variables at the beginning of your code.
Maybe this is a stupid question, but I was wondering if I could get information passed with a form into a for-loop.
The problem is as follows:
The passing of the information works, though he passes only for the last loop. For example if I click the submit button for loop 2 ($i = 2). The command $_POST['titel'] will only remember the information in last loop ($i = $numact-1) and not loop 2 ($i = 2).
for example if titel[0] = test0, titel[1] = test1, titel[2] = test2. and I click the submit button below titel[0] he passes the information from titel[2]. Is there an easy way to get around this?
I have the following code (For the sake of simplicity I shortened it);
<?php
for ($i = 0; $i <= $numact-1; $i++) {
echo "<tr><td width='150'>
<input type='text' name='titel' value='$titel[$i]' />
</td></tr>
<tr><td><input type='submit' name='submitreg' value='Toon activiteit'/>
</td></tr>";
}
?>
You're using the same parameter name over and over again (name=titel - you had a type and probably meant to write as 'title') so when the form submits - only one value will be passed.
You can easily fix that by passing the parameters as:
...
echo "<tr><td width='150'>
<input type='text' name='titel$i' value='$titel[$i]' />
</td></tr>
<tr><td><input type='submit' name='submitreg' value='Toon activiteit'/>
</td></tr>";
...
and reading it on the other side as title0, title1 etc.
As seen in this post, you can pass in an array simply by putting brackets around the index. PHP will reconstruct the array for you.
Also, you probably want your submit at the end of your table, not after each row. Your code should look something like this:
<?php
for ($i = 0; $i <= $numact-1; $i++) {
echo "<tr><td width='150'>
<input type='text' name='titel['.$i.']' value='$titel[$i]' />
</td></tr><tr><td><input type='submit' name='submitreg' value='Toon activiteit'/>
</td></tr>";
}
?>
The advantage of this approach is that it's more extensible, should you choose to use different values. However, Edson Junior's approach is slightly simpler.
You can change the name attribute to name=titel[] so PHP will automatically transform it to an array. It is not necessary to specify the index inside title[].
For example:
<input type="text" name="titel[]" value="x" />
<input type="text" name="titel[]" value="y" />
<input type="text" name="titel[]" value="z" />
When you submit the form, PHP will transform it to
"title" = array (
0 => "x",
1 => "y",
2 => "z"
);
In case you need to check what button was clicked, you could change the inputs type="submit" to <input type="button" name="submitreg" class="submitreg" id="whatever_you_want_but_has_to_be_unique" />.
Outside the loop, add another input wich will have the value of what button was pressed.
<input type="hidden" id="buttonPressed" name="buttonPressed" value="" />
Then add this code (you need to import jQuery library to the page so it understands the code below, wich is jQuery, here is the Docs.
<script type="text/javascript">
$(function(){
$("button.submitreg").live("click", function(){
var buttonPressed = $(this).attr("id");
("input#buttonPressed").val(buttonPressed);
});
}
</script>
All you need to do is get the buttonPressed value and you'll know what button was pressed.
I have created a PHP-site which basically is a site with some forms for MySQL-input.
This is how it looks right now. Pretty simple, fill it in and click submit to enter the data into the database.
http://i.imgur.com/ieMf39f.jpg
This is how I want it to look and work. I wan't it to be able to send multiple querys to the database with only one submit-button.
http://i.imgur.com/IdqcJjb.jpg
So the question is.. how do I solve this problem in the most simple and efficient way?
In the name of each field, use e.g. name="opb1[]", this way it will turn into an array (opb = array).
Then you could do like:
foreach($opt1 as $k => $_opt1)
if(isset($opb2[$k]) && isset($opb3[$k]) .....etc) {
// use each row e.g. $opb2[$k]...
}
}
Your HTML should look like:
<input name="name[]" />
<input name="obp1[]" />
<input name="obp2[]" />
<br />
<input name="name[]" />
<input name="obp1[]" />
<input name="obp2[]" />
and your PHP:
for($i = 0; $i < count($_POST['name']); $i++) {
// verify if all fields are completed
if(empty($_POST['name'][$i]) || empty($_POST['obp1'][$i])) { // all fields here
// add an error
} else {
$mysqli->query("INSERT INTO my_table VALUES ('" . $mysqli->real_escape_string($_POST['name'][$i]) . "', '" . $mysqli->real_escape_string($_POST['obp1'][$i]) . "')");
}
}
I am trying to add commenting like StackOverflow and Facebook uses to a site I'm building. Basically, each parent post will have its own child comments. I plan to implement the front-end with jQuery Ajax but I'm struggling with how to best tackle the PHP back-end.
Since having the same name and ID for each form field would cause validation errors (and then some, probably), I added the parent post's ID to each form field. Fields that will be passed are commentID, commentBody, commentAuthor - with the ID added they will be commentTitle-12, etc.
Since the $_POST array_key will be different each time a new post is processed, I need to trim off the -12 (or whatever the ID may be) from the $_POST key, leaving just commentTitle, commentBody, etc. and its associated value.
Example
$_POST['commentTitle-12']; //how it would be received after submission
$_POST['commentTitle']; //this is what I am aiming for
Many thanks
SOLUTION
Thanks to CFreak-
//Basic example, not actual script
<?php
if (array_key_exists("send", $_POST)) {
$title = $_POST['title'][0];
$body = $_POST['body'][0];
echo $title . ', ' . $body;
}
?>
<html>
<body>
<form name="test" id="test" method="post" action="">
<input type="text" name="title[]"/>
<input type="text" name="body[]"/>
<input type="submit" name="send" id="send"/>
</form>
</body>
</html>
Update 2
Oops, kind of forgot the whole point of it - unique names (although it's been established that 1) this isn't really necessary and 2) probably better, for this application, to do this using jQuery instead)
//Basic example, not actual script
<?php
if (array_key_exists("send", $_POST)) {
$id = $_POST['id'];
$title = $_POST['title'][$id];
$body = $_POST['body'][$id];
echo $title . ', ' . $body;
}
?>
<html>
<body>
<form name="test" id="test" method="post" action="">
<input type="text" name="title[<?php echo $row['id'];?>]"/>
<input type="text" name="body[<?php echo $row['id'];?>]"/>
<input type="hidden" name="id" value="<?php echo $row['id']; //the ID?>"/>
<input type="submit" name="send" id="send"/>
</form>
</body>
</html>
PHP has a little trick to get arrays or even multi-dimensional arrays out of an HTML form. In the HTML name your field like this:
<input type="text" name="commentTitle[12]" value="(whatever default value)" />
(you can use variables or whatever to put in the "12" if that's what you're doing, the key is the [ ] brackets.
Then in PHP you'll get:
$_POST['commentTitle'][12]
You could then just loop through the comments and grabbing each by the index ID.
You can also just leave it as empty square brackets in the HTML:
<input type="text" name="commentTitle[]" value="(whatever default value)" />
That will just make it an indexed array starting at 0, if you don't care what the actual ID value is.
Hope that helps.
You just have to iterate through $_POST and search for matching keys:
function extract_vars_from_post($arr) {
$result = array();
foreach ($arr as $key => $val) {
// $key looks like asdasd-12
if (preg_match('/([a-z]+)-\d+/', $key, $match)) {
$result[$match[1]] = $val;
} else {
$result[$key] = $val;
}
}
return $result;
}
Didn't test the code, though
I have created a form, with 5 textbox fields and I want to add those five entries in the database. I want to use the textbox "array", that way I can use a for-each when saving to the database. As anyone, any code on how to do this or can direct me in the right path?
input type="text" value="whateva" name= ?php text[0] ?>
input type="text" value="whateva" name= ?php text[1] ?>
input type="text" value="whateva" name= ?php text[2] ?>
if (isset($_POST['Submit']) {
//add to db
(for-each $text as $val) {
//add to db
}
}
Is this possible?
HTML
<input type="text" value="whateva" name="text[]" />
<input type="text" value="whateva" name="text[]" />
<input type="text" value="whateva" name="text[]" />
PHP
if (!empty($_POST['text'])) {
foreach ($_POST['text'] AS $value) {
// add to the database
$sql = 'INSERT INTO tableName SET fieldName = "' . mysql_real_escape_string($value) . '"';
}
}
Yes, HTML supports arrays. just name your textareas like this:
<textarea name="field[]"></textarea> /* Notice square brackets */
For this example, in PHP, your $_GET or $_POST will have array key with name 'field' and values from these textareas.
If 'Submit' is the name of the submit button. yeah that will work.
but few suggestions:
correct it as:
< input type="text" value="whateva" name= "" />
Use validation for the text submitted by user
IMPORTANT: "GET A BOOK ON PHP" and learn it. Seriously, if you learn this way, you wont become a good programmer. You are learning it the hardway. Book is must for you.