multiple checkbox value in array in php

Question

I have one form which contain product information and one field which have two(2) check box for status(want to post advertise for that particular product or not.)and i have one field which is for "add more" it will clone whole div and also check boxes so i have more then one output but I don't have getting single value.

<div>
     <label>I want to Advertise This Item</label>
     <input type="checkbox" value="1" name="chkyes[]" id="chkyes[]"/>
     Yes
     <input type="checkbox" value="0" name="chkyes[]" id="chkyes[]"/>
     No 
</div>

Above code is for selecting checkbox, and below code which echo value in array but I don't get the value of checkbox.

if(count($_POST)){
    $len = count($_POST['producttitle']);
    for ($i=1; $i < $len; $i++){
        echo $_POST['chkyes'][$i];
    }
}

you can't give id's like chkyes[] give it as chkyes1, chkyes2 — Deepika Janiyani
– Deepika Janiyani, Commented Jan 6, 2014 at 9:27
Where exactly is the form element with name of producttitle? — George
– George, Commented Jan 6, 2014 at 9:28
Oops, right. I think HTML5 allows these characters in IDs, but the real problem is that he has duplicate IDs. IDs must be unique. — Barmar
– Barmar, Commented Jan 6, 2014 at 9:33

MaiKaY · Accepted Answer · 2014-01-06 09:28:17Z

2

why you dont use foreach?

for eg

if (isset($_POST['chkyes'])) {
    foreach ($_POST['chkyes'] as $value) {
        echo $value;
    }
}

answered Jan 6, 2014 at 9:28

MaiKaY

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Comments

Milind Anantwar · Accepted Answer · 2014-01-06 09:57:57Z

2

The first approach:

<input type='checkbox' name='chkyes[1]'>
<input type='checkbox' name='chkyes[2]'>
<input type='checkbox' name='chkyes[3]'>

This way you could access them in PHP with

foreach ($_POST['chkyes'] as $id=>$checked){
   if ($checked =='on')
    //process your id
 }

The second approach:Set value's attributes on checkboxes:

<input type='checkbox' name='chkyes[]' value='1'>
<input type='checkbox' name='chkyes[]' value='2'>
<input type='checkbox' name='chkyes[]' value='3'>

With this you'll receive only checked values:

foreach ($_POST['chkyes'] as $id){
    //process your id
 }

answered Jan 6, 2014 at 9:57

Milind Anantwar

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Comments

w3b · Accepted Answer · 2014-01-06 09:31:09Z

1

Try Below code

<?php
if($_POST['submit'] == 'submit'){
    $len = count($_POST['chkyes']);
    for ($i=0; $i < $len; $i++){
        echo $_POST['chkyes'][$i];
    }
}
?>


<form name="test" method="POST">
<div>
     <label>I want to Advertise This Item</label>
     <input type="checkbox" value="1" name="chkyes[]" id="chkyes[]"/>
     Yes
     <input type="checkbox" value="0" name="chkyes[]" id="chkyes[]"/>
     No 
</div>
<input type="submit" name="submit" value="submit">
</form>

answered Jan 6, 2014 at 9:31

w3b

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Comments

Deepika Janiyani · Accepted Answer · 2014-01-06 09:35:37Z

1

Array of input start from an index of 0, and use $_POST['chkyes'] instead of $_POST['producttitle']

 if(count($_POST)){
     $len = count($_POST['chkyes']);
     for ($i=0; $i < $len; $i++){
         echo $_POST['chkyes'][$i];
     }
 }

also you can't give id's like chkyes[] give it as chkyes1, chkyes2

edited Jan 6, 2014 at 9:35

answered Jan 6, 2014 at 9:29

Deepika Janiyani

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9 Comments

Milind Anantwar Over a year ago

using characters like [,] are valid. problem might be duplication of ids

Deepika Janiyani Over a year ago

yup i said for id only that it can be an array

Milind Anantwar Over a year ago

You mentioned about chkyes[] being invalid.

Deepika Janiyani Over a year ago

for id, 'you can't give id's like chkyes[]'

user3164797 Over a year ago

if i give id like chkyes1[] and chkyes2[] then also it gives error Undefined offset: 2 and returns 0 as value.

|

Barmar · Accepted Answer · 2014-01-06 09:37:59Z

1

Only checkboxes that are checked are submitted in the form. They'll be collected in an array $_POST['chkyes'], but the indexes won't be the same as corresponding text inputs. You need to process them with their own foreach loop, not the same loop as for other inputs.

For what you're doing, why aren't you using radio buttons or a single checkbox? What if the user checks both Yes and No?

answered Jan 6, 2014 at 9:37

Barmar

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