check multiple values from checkbox in PHP

Question

I have this form :

<form action="" method="post">
<input type="checkbox" name="check_list[]" value="0" id="check_list">- 0<br>
<input type="checkbox" name="check_list[]" value="1" id="check_list">- 1<br>
<input type="checkbox" name="check_list[]" value="2" id="check_list">- 2<br>
<input type="checkbox" name="check_list[]" value="3" id="check_list">- 3<br>
<input type="checkbox" name="check_list[]" value="4" id="check_list">- 4<br>
<input type="checkbox" name="check_list[]" value="5" id="check_list">- 5<br>
<input type="checkbox" name="check_list[]" value="6" id="check_list">- 6<br>
<input type="checkbox" name="check_list[]" value="7" id="check_list">- 7<br><br>
<input type="submit" name="submit" Value="Submit"/>
</form>

Now I wont to check the result from this form ,, if result have (2,3,6) we need to do something, and if result have value (2,3) we need to do something, and if result have value (2) we need to do something, and if result have value (3) we need to do something,and if result have value (6) we need to do something,

How can do that in php ?

I try this but not work good with me

if(!empty($_POST['check_list'])) {

    foreach($_POST['check_list'] as $check) {
    if ($check =='2' && $check =='3' && $check =='6'){
        // do something
    } elseif ($check =='2' && $check =='3'){
        // do something
    } elseif ($check =='6'){
        // do something
    } elseif ($check =='3'){
        // do something
    } elseif ($check =='2'){
        // do something
    }
}
}

Also i try this and not do any thing

if(in_array(array(2,3,6),$_POST['check_list'])){ 
// not work
} elseif(in_array(array(2,3),$_POST['check_list'])){ 
// not work
} elseif(in_array(array(2),$_POST['check_list'])){ 
// work
} elseif(in_array(array(3),$_POST['check_list'])){ 
// work
} elseif(in_array(array(7),$_POST['check_list'])){ 
// work
}

Have you tried using a switch statement http://php.net/manual/en/control-structures.switch.php — Eliot K, May 29 '18 at 20:59
`if ($check =='2' && $check =='3' && $check =='6'){` how can $check be more than one thing at a time? — , May 29 '18 at 21:10
@smith i try `if(in_array(array(2,3,6),$_POST['check_list'])){ ...} `but not work — abukotsh, May 29 '18 at 21:14

score 1 · Answer 1 · answered May 29 '18 at 21:02

1

In short, when you submit the form you'll have an array $_POST['check_list'] that contains the elements you've checked. So, if you check 2, 3 and 6, $_POST['check_list'] = [2, 3, 6]. Note that if you don't check any options, $_POST['check_list'] will not exist.

Then you can use if (in_array(2, $_POST['check_list'])) {...} to do what you want if 2 is checked, for example.

answered May 29 '18 at 21:02

Gutierrez PS

227
2
10

what about if i have 2,3,6 ? how can use it in in_array ?? – abukotsh May 29 '18 at 21:12
You can check [this answer](https://stackoverflow.com/a/11040612/2014507) – Gutierrez PS May 29 '18 at 21:15
@GutierrezPS comparing $_POST['check_list'] will not work as intended if other options are checked. use the empty function to check if $_POST['check_list'] has been set. – Plixxer May 29 '18 at 21:16
@abukotsh `in_array(2, $array) && in_array(3, $array) && in_array(6, $array)` – Barmar May 29 '18 at 21:35

Plixxer · Accepted Answer · 2018-05-29T21:19:10.627

    <?php

if(!empty($_POST['check_list'])){
    if(
        has_values(Array(2,3,6), $_POST['check_list'])
    ){
        //Do what you need to do

    }else if(
        has_values(Array(2,3), $_POST['check_list'])
    ){
        //Do what you need to do

    }else if(
        has_values(Array(2), $_POST['check_list'])
    ){
        //Do what you need to do

    }
}else{
    //no checkboxes have been set
}

function has_values($testValues, $arrValues){
/*
    testValues is a 1 dimensional array (needles)
    arrValues is a 1 dimensional array that takes the array of set checkboxs ( haystack )
*/
    foreach ($testValues as $key => $value) {
        if(!in_array($value, $arrValues)){
            return false;
        }
    }
    return true;
}

Developer notes in_array is not type dependent.

if a checkbox is not checked the $_POST['check_list'] index will changes

i think `array_diff` or `array_intersect` is probably better, but this will work so you can have my vote. — , May 29 '18 at 21:30

check multiple values from checkbox in PHP

2 Answers2