I'm new to PHP but I'm working on an email script for an order form.
I have all the values and what not in a form, with a text element that is span-ned for javascript access client side.
What I need to do is also access these span values when I POST.
HTML:
<form name="myform" action="submit.php" method="post">
<strong>Price:</strong> $<span id="SMP">11.99</span>
<strong>Price:</strong> $<span id="SDP">11.99</span>
<strong>Price:</strong> $<span id="YTP">11.99</span>
<strong>Price:</strong> $<span id="SDP">11.99</span>
//bunch of input form code i truncated for readabilty
</form>
You can't do that. The POST array will only contain what you post via input fields. Easiest thing for you to do would be to have some hidden inputs with your values in them
<input type="hidden" name="prices[0]" value ="11.99">
<input type="hidden" name="prices[1]" value ="11.99">
<input type="hidden" name="prices[2]" value ="11.99">
This will be available in your $_POST array. You can access it like
$value1 = $_POST['prices'][0];
Or just iterate it through as an array
You can't. You'll have to add some hidden inputs, and modify them from Javascript, to get them server-side. PHP can't access to the HTML, and only inputs elements are posted.
Related
I have a form, getting values by $_POSTaccording to name that's okay. But how can I get value of not input. For example;
<b name="name1" value="1001">Phones</b>
How can I get 1001 by $_POST according to name="name1". Trying $_POST['name1'] but can't get.
What you have isn't a form input:
<b name="name1" value="1001">Phones</b>
The entire HTML isn't sent to the server in a form post, only form values are. So you need to have that in a form input. For example:
<input type="hidden" name="name1" value="1001" />
Then you don't need that information in your <b> element:
<b>Phones</b>
I have the following code snippet of my fields I have in my form:
<input id="username" type="text" placeholder="E-mail Address" value="" name="username"></input>
This is what I have in my input field. Is there anybody who will tell me how to get input values to the field using a url? e.g https://mysite?username=ken and it will show "ken" in the input field?
In your HTML, add the input field like this:
<input type="text" name="username" value="<?php echo htmlspecialchars($_GET['username']); ?>" />
Basically, the value attribute of the text field needs to be set to:
<?php echo $_GET['username']; ?>
The code right above this is how you would output a get variable in php whether you are putting it in a text field or not.
To access get variables, always use:
$_GET['variable_name'];
Then you can assign it to variables or pass it as a function parameter.
**However, I strongly do not recommend passing sensitive information like usernames and passwords through GET variables. **
First off, users could change the URL hence changing the variable. They could also accidentally share the URL with someone and that could give someone else access to their account. I would recommend that you create a cookie on their machine that is set to a random ID, and then in a MySQL database, associate that ID with a username so that you know the user can't accidentally share their account or change their username through the URL.
You can do it like this, make an isset in your php form input that can catch your ken variable from GET post, never forget the method="get" inside the form tag and if you are planning on submitting on the same page you can use action="<?php echo $_SERVER['PHP_SELF']; ?>" inside your form tag.. hope this helps, here is your code.. ^_^
<form id="form" name="form" method="get" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<fieldset>
<p>Input</p>
<div>
<input type="text" name="nameoffield" id="nameoffield" value="<?php if(isset($_GET['ken'])){echo $_GET['ken'];} ?>"> <br />
</div>
</fieldset>
<div>
<button type="submit" value="Submit" name="submit">
Submit
</button>
</div>
</form>
The <input> tag and other fields of form must be in a <form>tag.
<form action = "https://mysite" method = "get">
<input id = "username" type = "text" placeholder = "E-mail Address" name = "username" value = "<?php echo $_GET['username']; ?>" />
</form>
In the above code, form tag specifies that the method of submission is 'GET' and the action that will be taken on submission is URL to which your form data will be submitted and processed.
Now assuming that your form is in the same URL to which you are submitting your form, you will get the GET value in the same page (or URL), so in the input text field set the value which is obtained by GET method and use it.
All the GET key-value pairs are stored in an associative array $_GET from which you can access the value of a given key by using that as the index of the array.
e.g. Key is username in this case, so to get the value of the username, $_GET['username'] was used.
I'm trying to add a value to $_POST data while it gets submitted to the target page as follows:
post.php
<?php $_POST['field1'] = "Value1";?>
<html>
<head>
</head>
<body>
<form method="post" action="catch.php">
<input name="field2" type="text"/>
<input type="submit" value="Submit" />
</form>
</body>
</html>
catch.php
<?php
foreach ($_POST as $key => $value) {
echo $key . " : ". $value;
echo "<br/>";
}
?>
but I cannot catch 'field1' on the other end. I don't want to use a hidden input field. How can I achieve that?
Thanks!
When you send the form, the $_POST data is reset and assumes only the inputs inside the form and a possible query string you may have appended to form action.
The best way to accomplish what you want is using hidden field but since you dont want it, you can append a query string to your form action:
<form method="post" action="catch.php?field1=Value1">
You're not submitting field1 anywhere. What happens is this:
post.php generates a HTML page (one that doesn't contain any reference to field1)
the user's browser renders the page
on submit, only the elements inside the form are submitted
catch.php receives the elements submitted above.
In other words, you need to get that value into your form:
<form method="post" action="catch.php">
<input name="field2" type="text"/>
<input name="field1" type="hidden" value="<?php echo htmlspecialchars($_POST['field1']) ?>"/>
<input type="submit" value="Submit" />
</form>
There is no other way to get the value into your POST data, if it's not present in the form. What you could do as a workaround is store the data in GET (size limit), session (concurrency issues - what happens when the user has two tabs open, each with different session data?), or cookies (size limit AND concurrency issues).
You can't do it this way. If you want to send the data you're trying to add to the POST there only through the users form, you are forced to also store it somewhere client side (e.g. a hidden field or a cookie). What you're doing right now is setting some value into the POST variable, but it gets overridden by the users form post (or rather the $_POST variable you're using after the form post is another instance).
What you could do instead to keep it serverside is save the value in the variable to the session of the user, then in the form post action server side get the value again (given the fact that you're using sessions). Lastly you could just store it in some table in a database, though I wouldn't do this.
Since $_POST are data sent by post method to script, you can not use it for another request directly. You need to compose and send another post request. The easiest way for you will be to use hidden input field/s.
Or you can choose another approach to make http post request, for example curl methods.
If you don't need data to be given by post method, you can save it in session, for example.
try this:
in post.php
<?php $_SESSION['field1'] = "Value1";?>
<html>
<head>
</head>
<body>
<form method="post" action="catch.php">
<input name="field2" type="text"/>
<input type="submit" value="Submit" />
</form>
</body>
</html>
in catch.php
<?php
if(isset($_SESSION['field1']))
{
$_POST['field1'] = $_SESSION['field1'];
unset($_SESSION['field1']);
}
foreach ($_POST as $key => $value) {
echo $key . " : ". $value;
echo "<br/>";
}
?>
Make sure you have started the session.
Note: you must use hidden elements or query string as other user suggested.
I am try to get the value of the input field with a custom attribute I have created using PHP. This is my code:
<form action="uploadform.php" method="post">
<input type="text" name="email" id="email" mynewattribute="myemail">
<input type="submit" name="submit">
</form>
//uploadform.php
<?php
//I know $name = $_POST['email']; will give me the value but I would like to get the value of the input field with "mynewattribute" and not name. Is it possible?
?>
The web browser doesn't know what to do with your custom attribute, so will simply ignore it. The only data sent when you submit the form is the values of "successful" elements. So your custom data will never be sent, and can never be read by the receiving script.
The best place to put such data is into hidden input fields. One possibility is to use names with square brackets in, which PHP automatically converts into arrays. e.g.
<input type="text" name="email[value]">
<input type="hidden" name="email[magic]" value="true">
Populates an array like this:
$_POST['email']['value'] = '';
$_POST['email']['magic'] = 'true';
When I create i form - I do something like this:
<form name="form-name" method="post" action="?<?=$_SERVER['QUERY_STRING']?>">
[...some elements...]
<input type="submit" name="form-name" value="button">
</form>
Now I need to get the value of the name="" of the submit button, and not the actual value="".
In this case : "form-name".
And here's why:
When I submit a form; I write the action to database - and therefor need the name of the form submitted.
I know I can just have a hidden field with the form name. But I would like to make it simpler by just extracting the name from the submit button because I have a couple of other hidden form elements that I need to add on every single form I create to make my template system work.
And no javascript...
So, let's say your HTML form is this:
<form name="form-name" method="post" action="">
<input type="submit" name="form-name" value="button">
</form>
And you want to get what is inside name="form-name" in this case the form-name
Well, then in the PHP side you can, treat the $_POST global as associative array, and extract the key from it like this:
<?php
if(isset($_POST)){
foreach($_POST as $key=>$each){
echo $key; // this will output "form-name"
}
}
I might have come up with a solution to my question...
Here's a example form:
<form name="vehicle-vinNr" method="post" action="?<?=$_SERVER['QUERY_STRING']?>">
<input type="hidden" name="hello" value="world" readonly>
<input type="text" name="element">
<input type="submit" name="vehicle-vinNr" value="send">
</form>
First I need to extract and place the element-names into a new array:
<?php
if ($_POST){
foreach($_POST as $_FORM_ELEMENT_name => $_FORM_ELEMENT_value){
$_FORM_ELEMENT_names[] = $_FORM_ELEMENT_name;
}
}
?>
In this case the array now contains:
hello
element
vehicle-vinNr
If the submit-button is, and always is, the last element in the form - this would work:
$_FORM_name = end($_FORM_ELEMENT_names); // vehicle-vinNr
But sometimes the submit-button is not the last element, so I needed to make a change:
If I always start the name of the submit-button with submit_ - e.g. submit__vehicle-vinNr or with multiple submit buttons for different actions like submit_update__vehicle-vinNr/submit_delete_vehicle-vinNr I can just do this:
if ($_POST){
foreach($_POST as $_FORM_ELEMENT_name => $_FORM_ELEMENT_value){
if(strstr($_FORM_ELEMENT_name,'submit_')){
$_FORM_ELEMENT_submit_name = explode('__',$_FORM_ELEMENT_name);
$_FORM_name = $_FORM_ELEMENT_submit_name[1]; // vehicle-vinNr
}
}
}
This is the solution I came up with - any thoughts?