Question

I have a problem in my codes. Obviously, I’m beginning to program in PHP and know nothing about its advanced concepts. So I’m asking of your help. I’d like to add 2 months to the end date the user input. I tried this code below:

protected function inputEndDate() {
    $value = $this->endDate;
    $html = "";
    $html .= '<label for="enddate">End Date:</label>' . PHP_EOL;
    $html .= '<input type="text" readonly name="enddate" id="enddate" value="'.$value.'">';
    $html .= '<input type="button" id="enddatebutton" onclick="getEndDate()">' . PHP_EOL;
    return $html;
}


protected function inputExpiryDate() {
    $value = $this->endDate;
    $date = date('Y/m/d', strtotime("$value +2 month"));
    $html = "";
    $html .= '<label for="expirydate">Expiry Date:</label>';
    $html .= '<input type="text" readonly name="expirydate" id="expirydate" value="'.$date.'">';
    $html .= '<input type="button" id="expirydatebutton" onclick="getExpiryDate()">' . PHP_EOL;
    return $html;
}

But when I run the program, it’s not displaying the correct value; however it’s displaying the added two months of its start date. Please help. Thanks.

Answer 1

I am not sure if i understand your question.

If i call the php function inputEndDate() it renders this html for me

<label for="enddate">End Date:</label>
<input type="text" readonly name="enddate" id="enddate" value="">
<input type="button"     id="enddatebutton" onclick="getEndDate()">

The value of the input-field enddate is empty because on my code $this->endDate is empty.
Where do you get or fill $this->endDate?

If all 3 input-fields are on the same page you need javascript to change the value of expireDate based of the input of endDate – see my updated jsfiddle-example.

Update after review of php code

I took a look into your code – i could not find the spot where you are filling the server-side php var this->endDate. Based on your other question how to use change event to add dates in javascript i am unsure where the problem lies.

• If you process your php code on the server the value of expireDate must already be filled before you render the html to the client (the browser). See public function setEditBallpark() and the line $this->endDate = $this->ballparkDetails->getBallparkDetailsEndDate();
• If the page is loaded inside the browser of the client you have only html+css+javascript available. To fill the this->endDate you have to post the value of the client to the server (normal post or ajax). In line 17 is a comment # $_POST["enddate"] but the only place that may be getting the post value is this line $this->endDate = $this->createBallparkController->getFormEndDate(); on line 75. But the method name function setErrorForm() lets me assume that this method is not relevant for the normal post case.