PHP Checkbox Validation before Submit

Question

I have one last piece before finishing this form, but I think the functions in the template I'm basing it off of are making things a little complicated. Basically I want to have an "agree" checkbox be required before the submit button executes its command.

$tbl->addRow();

$tbl->addCell( $frm->addInput('checkbox', 'checkbox', 'check'),
            'submit', 'data', array('colspan'=>4) );

$tbl->addRow();

$tbl->addCell( $frm->addInput('submit', 'submit', 'Submit'),
            'submit', 'data', array('colspan'=>4, 'onclick'=>'if(!this.form.checkbox.checked)return false};',) );

$frmStr = $frm->startForm('result.php', 'post', '', array('onsubmit'=>'return checkSubmit(this);') ) .
    $tbl->display() . $frm->endForm();




return $frmStr;
}

Here is my php for the submit/checkbox. Below are the functions being called to create rows/cells/inputs. Using this format I can't simply put in tags and I think that's what's holding me back.

 function addCell($data = '', $klass = '', $type = 'data', $attr_ar = array() ) {
    $cell = array(
        'data' => $data,
        'klass' => $klass,
        'type' => $type,
        'atts' => $attr_ar
    );

    if ( empty($this->cur_section['rows']) ) {
        try {
            throw new Exception('You need to addRow before you can addCell');
        } catch(Exception $ex) {
            $msg = $ex->getMessage();
            echo "<p>Error: $msg</p>";
        }
    }

    // add to current section's current row's list of cells
    $count = count( $this->cur_section['rows'] );
    $curRow = &$this->cur_section['rows'][$count-1];
    $curRow['cells'][] = &$cell;
}

function addInput($type, $name, $value, $attr_ar = array() ) {
    $str = "<input type=\"$type\" name=\"$name\" value=\"$value\"";
    if ($attr_ar) {
        $str .= $this->addAttributes( $attr_ar );
    }
    $str .= $this->xhtml? ' />': '>';
    return $str;
}

Happy to share more of the code if that will help. Can anyone help me with formatting the code properly to fit inside of the "array" argument inside of the addInput function?

sorry, what do you mean by framework? just a php template i sourced with some js functions this is what I'm building off of if that's what you mean: dyn-web.com/php/order_form/example2.php — sixfiveoh
– sixfiveoh, Commented Jun 17, 2016 at 1:17
@sixfiveoh PHP can't do anything before the form is submitted. PHP runs on the server, not the client. — Barmar
– Barmar, Commented Jun 17, 2016 at 1:40

keupsonite · Accepted Answer · 2016-06-17 01:00:43Z

2

Replace

$tbl->addCell( $frm->addInput('checkbox', 'checkbox', 'check'),
            'submit', 'data', array('colspan'=>4) );

by

$tbl->addCell( $frm->addInput('checkbox', 'checkbox', 'check'),
            'submit', 'data', array('colspan'=>4, 'required' => 'required'));

But, that is can easily bypassed, i suggest you to add a script of verifications after the form was submitted, if this is not already the case.

answered Jun 17, 2016 at 1:00

keupsonite

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4 Comments

sixfiveoh Over a year ago

i used this for some of the radio switches in the form and it worked fine, but it doesn't seem to work for the checkbox? $tbl->addCell( $frm->addInput('checkbox', 'checkbox', 'check'), 'submit', 'data', array('colspan'=>4, 'required'=>true) ); doesn't seem to work. FWIW, i used 'required' => true for the radio switches, not 'required'=>'required'

Barmar Over a year ago

The required attribute needs to be in the checkbox, not the cell.

keupsonite Over a year ago

@Barmar Yes, I agree. The parameter array('required' => 'required') must be placed in 3rd position of the addInput method. My bad.

keupsonite Over a year ago

@sixfiveoh In HTML5 you can required a form element using: <input type="text" name="firstname" required> or <input type="text" name="firstname" required="required">. Because you don't have put the method addAttributes in you first post, we can't see what is expected by the method and this is why I have suggested you to add array('required' => 'required'), in this case. If it works with true, this is better for the conformity with the W3C.

Barmar · Accepted Answer · 2016-06-17 01:43:00Z

1

You need to add the required attribute to the checkbox.

$tbl->addCell($frm->addInput('checkbox', 'checkbox', 'check', array('required' => 'required')),
            'submit', 'data', array('colspan'=>4) );

answered Jun 17, 2016 at 1:43

Barmar

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2 Comments

sixfiveoh Over a year ago

a bit of an add-on question, is there no way using this function to add a text label to the left of the input? Right now I'm stuck putting any supporting text in a cell bordering the input box to add a description for the user.

Barmar Over a year ago

It depends on the way the rest of your class works. Can you create a span containing the text and the checkbox, and use that as the contents of the cell?

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