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How can I get the value of the checkbox in PHP? [closed]

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I am trying to make a registration page for my website but when I run it; it gives error. What am I doing wrong?
<?php
//Form values
$name_value=$_POST['Name_input'];
$Username_value=$_POST['Username_input'];
$DOB_value=$_POST['DOB_input'];
$Password_value=$_POST['Password_input'];
$Phone_number_value=$_POST['Phone_number_input'];
$Python_checkbox_value=$_POST['Python_checkbox'];
$Java_checkbox_value=$_POST['Java_checkbox'];
$C_sharp_checkbox_value=$_POST['C#_checkbox'];
$HTML_checkbox_value=$_POST['HTML_checkbox'];
$Cpp_checkbox_value=$_POST['C++_checkbox'];
$R_checkbox_value=$_POST['R_checkbox'];
$swift_checkbox_value=$_POST['swift_checkbox'];
$kotlin_checkbox_value=$_POST['kotlin_checkbox'];
$JS_checkbox_value=$_POST['JS_checkbox'];

Take a look at this code :
<form method="GET">
<input type="checkbox" value="value" name="name">checkbox label</input>
<input type="submit">
</form>
<?php
if (isset($_GET["name"]))
{
echo $_GET["name"];
}
?>
As you can see when I submit the form without checking, the parameter in URI is empty because the checkbox isn't defined (I used GET method)
But when I check it, you can see the parameter is name=value

required input fields on a html form [closed]

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I am trying to create a html form with required input fields. but its not responding. below is the code
<div class="col-sm-6">
<label for="city" class="form-control">city
<input name="city" type="text" id="city" class="form-control" required>
</label>
<div class="invalid-feedback">
valid city is required
</div>
</div>

If by "not responding" you mean that a user can submit the form without entering a "City" value, it may be because you need a <form> element around form controls in order to allow browsers' default behavior for required inputs to work correctly.

How to create 'add quantity' input box and embed it inside PHP scripts? [closed]

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Closed 6 years ago.
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Thanks for those who helped! I have figured it out!
How can I create a input field like the one in the image? And I want to embed it inside $_POST. Thanks for your time :)

This is an HTML5 input of type number. You use it this way:
<form method="POST" action="yourPHPfile.php">
<input type="number" name="number_input">
<input type="submit">
</form>
When this form is submitted, it will send the selected number to yourPHPfile.php and you can retrieve the number from $_POST['number_input']

You can use input for the number selecotr and post using a form like so:
<form method="post">
<input type="number" name="intNumber"/>
<input type="submit" />
</form>
Then in PHP you can do this
<?PHP
if(isset($_POST['intNumber'])){
$myNumber = $_POST['intNumber']; // intNumber is the name of of your input
}
?>
When the submit button the PHP will be fired.
Hope this helps!

Php form submit alert if less than 1min passed [closed]

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I need some help with my php code
<?php
date_default_timezone_set('America/Los_Angeles');
$now = date("H:i:s");
?>
<form method="post" name="update" action="update.php" />
<input type='text' name='fname' value=''>
<input type='text' name='lname' value=''>
<input type='text' name='email' value=''>
...
<button type="submit" value="Submit"/> Submit </button>
</form>
What i need:
If someone clicks on button submit but it passed less than 1 min since start($now)
then it must appear an Alert "Check Info"(not another page or popup),
an alert like "Do you really want to leave the page?"

I should not work for free... but I won't give you the full answer!!! Make an effort and fill in the right code <<< FILL >>> to get it to work!!!
<script src="<<<FILL>>>"></script>
<script>
submitAllowed = false
$("form").submit(function(e){
e.preventDefault();
if (<<<FILL>>>||confirm("Do you really want to leave")) {
this.submit()
}
});
function submitAttempt(){
submitAllowed = true;
}
setTimeout(<<<FILL>>>, 60000);
</script>

Send an email from HTML / Java script [closed]

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I have a simple html page which should take the input from text box and send that as an email.
function getData()
{ var txt=document.getElementById("result").value; }
<body>
<form>
<input type="text" id="result" size="20">
<input type="button" onclick="getData()">
</form>
</body>
Now i need to send the value of txt as email. Whats the easiest way to achieve that? I am familiar with Java/ Java script. I have no hands on PHP.

You cannot send an email using client-side JavaScript.
You will need to submit the form to a server side script which can send the mail for you.
This is not too difficult using PHP, so I urge you to read up on it. Here's a good link: http://code.tutsplus.com/tutorials/sanitize-and-validate-data-with-php-filters--net-2595
<form action="myscript.php">
<input type="text" name="message" size="20">
<input type="submit" value="Send mail"">
</form>
Then in myscript.php:
<?
$message = filter_var($_POST['message'], FILTER_SANITIZE_STRING);
mail("someone#example.com","My subject",$message);
?>