BMI calculator online free. Generate a report online.

<?php

require_once '[path to Docxpresso]/CreateDocument.inc';
$doc = new Docxpresso\createDocument(array('template' => './ideal-weight.odt'));
$format = '.'.$_POST["file"];//.pdf, .doc, .docx, .odt, .rtf
//replace single variable
$imc = calcIMC($_POST["height"],$_POST["weight"]);
$arr_XY = calcXYIcon($_POST["height"],$_POST["weight"]);
$doc->replace(array(
        'name' => array('value' => $_POST["name"]),
        'height' => array('value' => $_POST["height"]),
        'weight' => array('value' => $_POST["weight"]),
        'BMI' => array('value' => number_format($imc,2))
    ));
$doc->replace(array('img_person' => array('value' => nameImgBody($imc,$_POST["sex"]), 
                                          'image' => true)));

$doc->replace(array('head' => array('value' => ''.nameImgHead($imc,$_POST["sex"]), 
                                    'offsetX' => ''.$arr_XY['x'].'px',
				    'offsetY' => ''.$arr_XY['y'].'px', 
				    'image' => true)));

$rnd = rand(1,999999);
$str_file = 'tmp/imc' . $rnd . $format;
$doc->render('./'.$str_file); 

sleep(1);
while(!file_exists('./'.$str_file)) sleep(1);

echo "{url: '".$_SERVER['HTTP_REFERER'].$str_file."'}";

/* Auxiliary functions to compute the BMI and pick the right image to render */

function getYCuadratic($x)
{
    $x -=22;
    $y = ($x*$x)/450;
    return $y;
}
function calcIMC($h,$w)
{
    $h = intval($h)/100;
    $h2=$h*$h;
    $imc=intval($w)/$h2;
    return $imc;
}
function calcXYIcon($h,$w)
{
	$arr['x'] = 0;
	$arr['y'] = 0;
	$x = 160 - 40;
	$x = intval((intval($w)-40)*490/$x);
	$arr['x']=$x+10;
	$y = 200 - 150;
	$y = intval((200-intval($h))*380/$y);
	$arr['y'] = $y+35;
	return $arr;
}
function idImgBody($imc)
{
    $n=1;
    if($imc<18.5) $n=2;
    else if($imc<18.5) $n=3;
    else if($imc<25) $n=4;
    else if($imc<30) $n=5;
    else if($imc<35) $n=6;
    else if($imc<40) $n=6;
    else if($imc>=40) $n=6;
    return $n;
}
function nameImgBody($imc,$woman)
{
    $n = idImgBody($imc);
    $src = './img/dibu0'.$n.''.($woman=='woman'?'w':'').'.png';
    return $src;    
}
function nameImgHead($imc,$woman)
{
    $n = idImgBody($imc);
    $src = './img/cabeza0'.$n.''.($woman=='woman'?'w':'').'.png';
    return $src;
}