How to fix stripslashes() expects parameter 1 to be string when also using array

Question

I have a php form that passes values to an email. The form has both single values and arrays. I'm getting the following error and I can't fix it.

Warning: stripslashes() expects parameter 1 to be string, array given in /home/...... line 147

If tried to add

if(is_array$cleanvalue = stripslashes($value);

Line 147 is as follows:

#clean fields for repost or display
foreach ($_POST as $key=>$value) {
$cleanvalue = stripslashes($value);
$repostvalue = stripquotes($cleanvalue);
$hiddenhtml .= "<input type=\"hidden\" name=\"$key\" 
value=\"$repostvalue\">\n";
${$key} = $cleanvalue;
}

Upon submitting the form, I get the following error, but not until the entire form is filled out. Warning: stripslashes() expects parameter 1 to be string, array given in /home/...... line 147

Answer 1

You could try using is_array() and mapping stripslashes() on each value if it is:

foreach ($_POST as $key=>$value) {
    if (is_array($value)) {
        ${key} = array_map('stripslashes', $value);
    } else {
        $cleanvalue = stripslashes($value);
    } 

    $repostvalue = stripquotes($cleanvalue);
    $hiddenhtml .= "<input type=\"hidden\" name=\"$key\" value=\"$repostvalue\">\n";
    ${$key} = $cleanvalue;
}

It looks like stripquotes() may be a custom function? You'll need to modify it similarly. You will need to loop over your values differently if you want to output them in html again, maybe something like this:

foreach ($_POST as $key=>$value) {
    if (is_array($value)) {
        ${key} = array_map('stripslashes', $value);
    } else {
        $cleanvalue = stripslashes($value);
    } 

    $repostvalue = stripquotes($cleanvalue);

    if (is_array($value))
    {
        foreach($repostvalue as $repost) {
            $hiddenhtml .= "<input type=\"hidden\" name=\"$key[]\" value=\"$repost\">\n";
        }

    } else {
        $hiddenhtml .= "<input type=\"hidden\" name=\"$key\" value=\"$repostvalue\">\n";
    }

    ${$key} = $cleanvalue;
}