how to send by mail values of multiple checkboxes with php

Question

I do not succeed in sending the values of multiple checkboxes from a form with PHP mail.

This is piece of my form with the checkboxes:

<input type="checkbox" name="registercheckbox[]" value="saturday-16:00">
<input type="checkbox" name="registercheckbox[]" value="saturday-17:00">
<input type="checkbox" name="registercheckbox[]" value="saturday-18:00">

In my php file i use this to settle the values form the multiple checkboxes:

$selected_checkbox = $_POST['registercheckbox'];

  if(empty($selected_checkbox)) {
    echo("you have to chose at least 1 checkbox!");
  }
  else {

    $N = count($selected_checkbox);
    echo('Your preferences are: ');
    for($i=0; $i < $N; $i++) {
        $preferences = $selected_checkbox[$i];
      echo($selected_checkbox[$i] . " ");

    }

  }

In the body preparing for the email i use this:

  $body .= "Preferences: ";
  $body .= $preferences;
  $body .= "\n";

and to send the mail:

mail($to, $subject, $body, $headers)

The echoes are working fine: it echoes every selected value of the checkboxes But sending the email: it only sends the last checked checkbox value

What am I doing wrong?

You overwrite it each time, try: `$preferences .= $selected_checkbox[$i];` — AbraCadaver, Mar 08 '18 at 18:31
Side note: You shouldn't be concatenating `$body` like that; it's quite problemsome. — Funk Forty Niner, Mar 08 '18 at 18:35
[This Q&A](https://stackoverflow.com/questions/18421988/getting-checkbox-values-on-submit) will help you. A `foreach` would work best for this. It's probably also a possible duplicate. — Funk Forty Niner, Mar 08 '18 at 18:39

score 2 · Answer 1 · answered Mar 08 '18 at 18:31

Why not use a foreach loop?

if(empty($selected_checkbox)) {
  echo("you have to chose at least 1 checkbox!");
} else {
  $preferences = ''; // avoid php info messages.

  foreach($selected_checkbox as $value){
    $preferences .= $value . PHP_EOL;
  }
}

And the change to your code is to append the next line of text, you're currently overwriting it with $preferences = 'new value' each loop cycle.

The short hand is: $preferences .= 'new value', otherwise interpreted as $preferences = $preferences . 'new value';

score 1 · Accepted Answer · answered Mar 08 '18 at 18:34

1

The problem is you just store on $preferences the last value, so you could useimplode on $selected_checkbox and get a list comma-separated so:

$body .= "Preferences: ";
$body .= implode(', ', $selected_checkbox);
$body .= "\n";

answered Mar 08 '18 at 18:34

Averias

931
1
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20

works perfect now! – Jack Maessen Mar 08 '18 at 18:40

how to send by mail values of multiple checkboxes with php

2 Answers2