PHPmailer: Exclude input field from foreach loop - forms

Question

I am happily running a contact form using https://github.com/PHPMailer/PHPMailer and recently added https://friendlycaptcha.com to minimize the amount of spam sent by bots through that form. I love the sleek implementation with no user interaction. The captcha is activated once you click the first input field in the form and auto-solves.
Unfortunately the captcha's solution (hidden input field) adds an enormous string to the e-mail that I would like to exclude.
How do I tell the foreach loop not to include the frc-captcha-solution in the mail that's composed?
private function compose_mail($post)
{
$content = "The following message has been received via contact form:\n\n";
foreach($post as $name=>$value)
{
$content .= ucwords($name).": \t";
$content .= "$value\n\n";
}
$this->mailer->Body = $content;
}
This is the input field in the form that is generated and yields the long string.
<input name="frc-captcha-solution" class="frc-captcha-solution" type="hidden" value=".UNSTARTED">
An example of what I get is:
name: Joe
e-mail: joe#miller.com
address: 100 street
ZIP: 10100
place: City
phone: [phone]
msg: This is a test message
Frc-captcha-solution: f5e6874becd6758f456b78f6f1726e1d.YadsJVSp+/j0pyBNAQwtjQAAAAAAAAAA+eFoDacaj3c=.AAAAAJZoAQABAAAAQ5YAAAIAAADCJAUAAwAAAF9IAQAEAAAAj5cEAAUAAACwkQMABgAAAFcaAAAHAAAAfvIEAAgAAADvUwIACQAAAK/MAQAKAAAAm+MBAAsAAACU6AAADAAAAJZUAAANAAAA/dAEAA4AAABrSwEADwAAAC7mAAAQAAAAXFoDABEAAAD4UAEAEgAAACMEAAATAAAA3xcCABQAAABBHwMAFQAAAE6LAQAWAAAA1mwAABcAAAAmwwAAGAAAACIZBwAZAAAA6p4AABoAAADovwIAGwAAAFE/AAAcAAAA+d8BAB0AAACQ8gAAHgAAAO1fAgAfAAAAbtwCACAAAAA7EgEAIQAAABmWAQAiAAAA/ysAACMAAAAx0wIAJAAAAJsyBAAlAAAA6acBACYAAACATwAAJwAAAM/wBQAoAAAATLYJACkAAABT1AIAKgAAAMWWAwArAAAAzIAGACwAAAA3fwAA.AgAA

Answer 1

There are many ways to do that, but one is to skip that name when it appears in your loop:
private function compose_mail($post)
{
$content = "The following message has been received via contact form:\n\n";
foreach($post as $name => $value) {
if ($name !== 'frc-captcha-solution') {
$content .= ucwords($name).": \t";
$content .= "$value\n\n";
}
}
$this->mailer->Body = $content;
}