How to submit the values of checkbox? [duplicate] - php

Question

This question already has answers here:
How to pass an array of checked/unchecked checkbox values to PHP email generator?
(5 answers)
Closed 9 years ago.
On my form I have this part :
<input type="checkbox" name="city" value="Nicosia" class="choosecity">Nicosia<br>
<input type="checkbox" name="city" value="Limassol" class="choosecity">Limassol<br>
<input type="checkbox" name="city" value="Larnaca" class="choosecity">Larnaca<br>
and on the results page where I use the mail function, I want to get thechecked cities.
I used this without result:
foreach($_POST['city'] as $checkbox){
echo $checkbox . ' ';
}
What am I missing here?

Answer 1

Use name="city[]". Otherwise you will only be able to submit one city. You may also want to use
$cities = isset($_POST['city']) ? $_POST['city'] : array();
foreach ($cities as $city)

Answer 2

You need to name your inputs as an array name="city[]"

Answer 3

PHP uses the square bracket syntax to convert form inputs into an array, so when you use name="education[]" you will get an array when you do this:
$educationValues = $_POST['education']; // Returns an array
print_r($educationValues); // Shows you all the values in the array
So for example:
<p><label>Please enter your most recent education<br>
<input type="text" name="education[]"></p>
<p><label>Please enter any previous education<br>
<input type="text" name="education[]"></p>
<p><label>Please enter any previous education<br>
<input type="text" name="education[]"></p>
Will give you all entered values inside of the $_POST['education'] array.
In JavaScript, it is more efficient to get the element by id...
document.getElementById("education1");
The id doesn't have to match the name:
<p><label>Please enter your most recent education<br>
<input type="text" name="education[]" id="education1"></p>

Answer 4

You just just have to add this [] to input name this will create an array starting with [0]. The result will look so:
array(
[0] => 'Nicosia',
[1] => 'Limassol',
[2] => 'Larnaca',
)
The HTML:
<input type="checkbox" name="city[]" value="Nicosia" class="choosecity" />Nicosia<br>
<input type="checkbox" name="city[]" value="Limassol" class="choosecity" />Limassol<br>
<input type="checkbox" name="city[]" value="Larnaca" class="choosecity" />Larnaca<br>
The PHP:
if( isset($_POST[city]) && is_array($_POST[city]) ){
foreach($_POST[city] as $checkbox){
echo $checkbox . ' ';
}
}