forms - PHP Return text field data only if box is checked -

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i'm creating simple email order form, php skills lacking. have 4 text fields, , want them returned if checkbox selected

    <input type="checkbox" class="checks" name="cards" id="cards" value="yes" /> business cards <label for="cardname1">name (exactly should appear on card): </label><input type="text" name="cardname1" id="cardname1"> <label for="title1">title: </label><input type="text" name="title1" id="title1"> <label for="phone1">phone: </label><input type="text" name="phone1" id="phone1"> <label for="fax1">fax: </label><input type="text" name="fax1" id="fax1">

i'm returning

$body = "from: $name\n e-mail: $email\n phone:\n $phone";

from part of form. simplest way include additional data if box checked? ideally, i'd combine data 1 variable

$carddata = $cardname1, $title1, $phone1, $fax1

just check see if checkbox checked. if so, append values $body. used little "trick" implode() simplifies bit:

if ($cards === 'yes') { // make sure checkbox ichecked. need put real value here.     $body .= "\n " . implode("\n ", array($cardname1, $title1, $phone1, $fax1)); }

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