PHP implode(): Invalid arguments passed

Question

I have a php form which has a checkbox option in which if the user selects 'Other', a text input appears. This is working well but the data is not submitting. Im gettting the error message PHP implode(): Invalid arguments passed

Here is:

PHP validation

if(!isset($_POST['competitor_model'])){   
echo '<p><font color="red" size="+1">• Please select at least one competitor model</font></p>';
} else {
$compmodel = implode(',', $_POST['competitor_model']); 
}

Here is the JS/HTML form

        <script type="text/javascript">
        var temp = '';
        function disableTxt() {
        var field = document.getElementById("other");
        if(field.value != '') {
        temp = field.value;
        }
        field.style.display = "none";
        field.value = '';
        }
        function enableTxt() {
        document.getElementById("other").style.display = "inline";
        document.getElementById("other").value = temp;
        }
        </script>         


        <input type="checkbox" value="BMW 3-series" onchange="disableTxt()"  name='competitor_model[]'>BMW 3-series<br>
        <input type="checkbox" value="Mercedes Benz C-class" onchange="disableTxt()"  name='competitor_model[]'>Mercedes Benz C-class<br>
        <input type="checkbox" value="Lexus IS" onchange="disableTxt()"  name='competitor_model[]'>Lexus IS<br>
        <input type="checkbox" value="Audi A4" onchange="disableTxt()" name='competitor_model[]'>Audi A4<br>
        <input type="checkbox" value="Other"  onchange="enableTxt(Number)" name='competitor_model[]'>Other <em>If yes please submit model</em>
        <input type="text" name="competitor_model[]" id="other" style="display:none;" value="<?php if (isset($_POST['competitor_model'])) echo $_POST['competitor_model']; ?>"/>

You shouldn't use competitor_model[] on input text. Also, <font> tag has deprecated for many years. Use CSS instead. Last, you should at least check is_array() in PHP before you use implode() — Raptor
– Raptor, Commented Nov 9, 2015 at 3:09
$_POST['competitor_model'] must be an array. Try var_dump($_POST['competitor_model']) and confirm? — camelCase
– camelCase, Commented Nov 9, 2015 at 3:09

Sanjuktha · Accepted Answer · 2015-11-09 03:14:18Z

10

$_POST['competitor_model'] is an array.Try this :

if (is_array($_POST['competitor_model']))
        {
        $compmodel = implode(",", $_POST['competitor_model']);
        }

or try so-

echo implode(', ', (array)$_POST['competitor_model']);

PHP implode()

edited Nov 9, 2015 at 3:14

answered Nov 9, 2015 at 3:11

Sanjuktha

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4 Comments

Raptor Over a year ago

The problem is elsewhere.

Sanjuktha Over a year ago

can you just var_dump and see whether the values are got?

Sanjuktha Over a year ago

may be because $_POST['competitor_model'] is not resulting as an array

Sanjuktha Over a year ago

@ Raptor-yea i didn't notice that it is text,you are right for text we don't initialize it as an array.

Axel · Accepted Answer · 2017-10-11 00:54:31Z

4

I faced the same problem and this is what worked for me in Laravel:

$contributes = $request->your_contribute;
$each_contribute = implode(',', (array)$contributes);

edited Oct 11, 2017 at 0:54

Axel

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answered Oct 11, 2017 at 0:18

Zymawy

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Comments

nazrul islam · Accepted Answer · 2018-05-14 17:36:44Z

0

Error Message :implode(): Invalid arguments passed in C:\xampp\htdocs\test_01\index.php on line 70

Answer : This type of error message occur when implode function do not get any array with string to implode.

answered May 14, 2018 at 17:36

nazrul islam

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