I have a input field as follows:
<input type="text" name="subject" id="subject" value="Car Loan">
I would like to get the input fields value Car Loan and assign it to a session. How do I do this using PHP or jQuery?
Use PHP's $_POST or $_GET superglobals to retrieve the value of the input tag via the name of the HTML tag.
For Example, change the method in your form and then echo out the value by the name of the input:
Using $_GET method:
<form name="form" action="" method="get">
<input type="text" name="subject" id="subject" value="Car Loan">
</form>
To show the value:
<?php echo $_GET['subject']; ?>
Using $_POST method:
<form name="form" action="" method="post">
<input type="text" name="subject" id="subject" value="Car Loan">
</form>
To show the value:
<?php echo $_POST['subject']; ?>
Example of using PHP to get a value from a form:
Put this in foobar.php:
<html>
<body>
<form action="foobar_submit.php" method="post">
<input name="my_html_input_tag" value="PILLS HERE"/>
<input type="submit" name="my_form_submit_button"
value="Click here for penguins"/>
</form>
</body>
</html>
Read the above code so you understand what it is doing:
"foobar.php is an HTML document containing an HTML form. When the user presses the submit button inside the form, the form's action property is run: foobar_submit.php. The form will be submitted as a POST request. Inside the form is an input tag with the name "my_html_input_tag". It's default value is "PILLS HERE". That causes a text box to appear with text: 'PILLS HERE' on the browser. To the right is a submit button, when you click it, the browser url changes to foobar_submit.php and the below code is run.
Put this code in foobar_submit.php in the same directory as foobar.php:
<?php
echo $_POST['my_html_input_tag'];
echo "<br><br>";
print_r($_POST);
?>
Read the above code so you know what its doing:
The HTML form from above populated the $_POST superglobal with key/value pairs representing the html elements inside the form. The echo prints out the value by key: 'my_html_input_tag'. If the key is found, which it is, its value is returned: "PILLS HERE".
Then print_r prints out all the keys and values from $_POST so you can peek as to what else is in there.
The value of the input tag with name=my_html_input_tag was put into the $_POST and you retrieved it inside another PHP file.
You can get the value $value as :
$value = $_POST['subject'];
or:
$value = $_GET['subject']; ,depending upon the form method used.
session_start();
$_SESSION['subject'] = $value;
the value is assigned to session variable subject.
For global use, you may use:
$val = $_REQUEST['subject'];
and to add yo your session, simply
session_start();
$_SESSION['subject'] = $val;
And you dont need jQuery in this case.
function get_input_tags($html)
{
$post_data = array();
// a new dom object
$dom = new DomDocument;
//load the html into the object
$dom->loadHTML($html);
//discard white space
$dom->preserveWhiteSpace = false;
//all input tags as a list
$input_tags = $dom->getElementsByTagName('input');
//get all rows from the table
for ($i = 0; $i < $input_tags->length; $i++)
{
if( is_object($input_tags->item($i)) )
{
$name = $value = '';
$name_o = $input_tags->item($i)->attributes->getNamedItem('name');
if(is_object($name_o))
{
$name = $name_o->value;
$value_o = $input_tags->item($i)->attributes->getNamedItem('value');
if(is_object($value_o))
{
$value = $input_tags->item($i)->attributes->getNamedItem('value')->value;
}
$post_data[$name] = $value;
}
}
}
return $post_data;
}
error_reporting(~E_WARNING);
$html = file_get_contents("https://accounts.google.com/ServiceLoginAuth");
print_r(get_input_tags($html));
If its a get request use, $_GET['subject'] or if its a post request use, $_POST['subject']
<form action="" method="post">
<input type="text" name="subject" id="subject" value="Car Loan">
<button type="submit" name="ok">OK</button>
</form>
<?php
if(isset($_POST['ok'])){
echo $_POST['subject'];
}
?>
Related
I pretty newbie to php and javascript but more i am curious about PHP. I want to add elements into a empty array every time i add a new element trough a input form, and after that i want those elements to be displayed in to the browser .The code i use is this
<form action="index.php" method="POST">
<input type="text" name="name" placeholder="name"><br><br>
<input type="submit" name="submit" value="enter"><br><br>
</form>
<?php
if (isset($_POST['submit'])) {
$_SESSION['names']=array();
$names=$_SESSION['names'];
$name=$_POST['name'];
array_push($names,$name);
for($i=0;$i<count($names);$i++){
echo $names[$i];
}
};
How could i achieve to display every element inside the array that i add trough the input field in php?
You overwrite the value every time because you wipe out the array on every page load: $_SESSION['names']=array();. Instead check to see if that session variable exists (and is an array) first and, if it doesn't, then create it. Otherwise just append to that array.
<form action="index.php" method="POST">
<input type="text" name="name" placeholder="name"><br><br>
<input type="submit" name="submit" value="enter"><br><br>
</form>
<?php
session_start();
if (isset($_POST['submit'])) {
if (!isset($_SESSION['names']) || !is_array($_SESSION['names'])) {
$_SESSION['names'] = array();
}
$name = $_POST['name'];
$_SESSION['names'][] = $name;
$num_names = count($_SESSION['names']);
for($i=0;$i<$num_names;$i++){
echo $_SESSION['names'][$i];
}
};
I am making a form in html. When a person clicks on submit, it checks if certain fields are filled correctly, so pretty simple form so far.
However, i want to save the text which is typed into the fields, if a person refreshes the page. So if the page is refreshed, the text is still in the fields.
I am trying to achieve this using php and a cookie.
// Cookie
$saved_info = array();
$saved_infos = isset($_COOKIE['offer_saved_info']) ? explode('][',
$_COOKIE['offer_saved_info']) : array();
foreach($saved_infos as $info)
{
$info_ = trim($info, '[]');
$parts = explode('|', $info_);
$saved_info[$parts[0]] = $parts[1];
}
if(isset($_SESSION['webhipster_ask']['headline']))
$saved_info['headline'] = $_SESSION['webhipster_ask']['headline'];
// End Cookie
and now for the form input field:
<div id="headlineinput"><input type="text" id="headline"
value="<?php echo isset($_SESSION['webhipster_ask']['headline']) ?
$_SESSION['webhipster_ask'] ['headline'] : ''; ?>"
tabindex="1" size="20" name="headline" /></div>
I am new at using SESSION within php, so my quesiton is:
Is there a simpler way of achieving this without using a cookie like above?
Or what have i done wrong in the above mentioned code?
First thing is I'm pretty sure you're echo should have round brackets around it like:
echo (isset($_SESSION['webhipster_ask']['headline']) ? value : value)
That's not really the only question your asking though I think.
If you're submitting the data via a form, why not validate using the form values, and use the form values in your html input value. I would only store them to my session once I had validated the data and moved on.
For example:
<?php
session_start();
$errors=array();
if($_POST['doSubmit']=='yes')
{
//validate all $_POST values
if(!empty($_POST['headline']))
{
$errors[]="Your headline is empty";
}
if(!empty($_POST['something_else']))
{
$errors[]="Your other field is empty";
}
if(empty($errors))
{
//everything is validated
$_SESSION['form_values']=$_POST; //put your entire validated post array into a session, you could do this another way, just for simplicity sake here
header("Location: wherever.php");
}
}
if(!empty($errors))
{
foreach($errors as $val)
{
echo "<div style='color: red;'>".$val."</div>";
}
}
?>
<!-- This form submits to its own page //-->
<form name="whatever" id="whatever" method="post">
<input type="hidden" name="doSubmit" id="doSubmit" value="yes" />
<div id="headlineinput">
<input type="text" id="headline" value="<?php echo $_POST['headline'];?>" tabindex="1" size="20" name="headline" />
<!-- the line above does not need an isset, because if it is not set, it will simply not have anything in it //-->
</div>
<input type="submit" value="submit" />
</form>
I managed to get my API lyrics code working. All I'm facing is a small problem: When a user enters a song name in a textbox and clicks the submit button, I catch the value via getElementById, and then how do I append it with the URL below?
Here's my code:
<?php
//Catches the value of the Submit button:
$submit = isset($_POST['submit']);
if($submit) {
?>
<script type="text/javascript">
var val1 = document.getElementById('val').value;
</script>
<?php
/* The below $res contains the URL where I wanna append the caught value.
Eg: http://webservices.lyrdb.com/lookup.php?q=Nothing Else Matters(Or
what the user searches for)&for=trackname&agent=agent
*/
$res = file_get_contents("http://webservices.lyrdb.com/lookup.php?q='+val1+' &for=trackname&agent=agent");
?>
<html>
<form method="post" action="">
Enter value: <input type="text" name="value" id="val" /><br/>
<input type="submit" value="Submit" name="submit" />
</form>
</html>
Could you please correct me as to where I'm making a mistake in this piece of code, highly appreciate all help in this forum! :)
As far as I understand your question, what you need to do is:
<?php
//Catches the value of the Submit button:
$submit = isset($_POST['submit']);
if($submit) {
$val1 = $_POST['val']; // TO store form passed value in "PHP" variable.
/* The below $res contains the URL where I wanna append the caught value.
Eg: http://webservices.lyrdb.com/lookup.php?q=Nothing Else Matters(Or
what the user searches for)&for=trackname&agent=agent
*/
$res = file_get_contents("http://webservices.lyrdb.com/lookup.php?q=' . urlencode($val1) . ' &for=trackname&agent=agent");
} // This is to end the "if" statement
?>
and then change the form input field to:
Enter value: <input type="text" name="val" id="val" /><br/>
I am not sure if POST accepts id values too!
Remove the javascript it's unnecessary. PHP runs at the server. Javascript at the client.
Then change your PHP code to this:
if(isset($_POST['value'])) {
$res = file_get_contents("http://webservices.lyrdb.com/lookup.php?q=". $_POST['value'] ." &for=trackname&agent=agent");
}
How would I send information from a form to a block of PHP code and then back to a text area? I can not find this answer.
To print out the text you entered in the textfield on the next request would look like this assuming you render the same page (i.e. myform.php):
<?php
$fieldValue = htmlentities($_POST['myfield']);
?>
<form action="myform.php" method="post">
<label for="myfield">Your textfield:</label>
<input type="text" name="myfield" id="myfield" value="<?php echo $fieldValue; ?>" />
</form>
A very basic example.
Assuming you have a PHP file named index.php
<?php
$val = 'Nothing in POST';
if (!empty($_POST)) { //$_POST is where stuff posted from the FORM is saved
$val = isset($_POST['text']) ? $_POST['text'] : '';//you're looking for the data with key text which is the name of your textarea element
$val = 'Got something from POST : ' . $val;
}
?>
<form action='index.php' method='post'>
<textarea name='text'><?php echo $val ?></textarea>
</form>
Have a look at this tutorial for the basics : http://net.tutsplus.com/articles/news/diving-into-php/
use ajax!(and use jquery for that ajax!)
suppose you have this html :
<input type="text" id="input">
<textarea id="result"></textarea>
than the script should be:
$('#input').keypress(function(e){
if(e.wich != 13)//not enter
return;
$.get(your_php_file.php,{param1:val1,param2:val2},function(result){
$('#result').val(result);
});
});
when you hit enter on the input field,the ajax function is being called that requests the file your_php_file.php?param1=val1¶m2=val2. With the php's result, the callback function is being called which updates your textarea
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