cant update my DB in php mysql - php

Question

Hello I can't get my DB to update. If I run it in mySQL querybox the query works but not in my php code...
I don't get any errors but it just will not update.
Can someone help me?
php
if(isset($_POST['btnSignup']))
{
$con=mysqli_connect('test', 'test', 'test', 'test');
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
if (isset($name)) {
mysqli_query($con,
"UPDATE `tbl_klant` \n"
. " SET `kl_aanspreek`= \'$aansp\',\n"
. " `kl_voornaam`= \'$voornaam\',\n"
. " `kl_achternaam`= \'$achternaam\',\n"
. " `kl_email`= \'$email\',\n"
. " `kl_gsm`= $gsm ,\n"
. " `kl_fax`= $fax ,\n"
. " `kl_telefoon`= $telefoon,\n"
. " `kl_straat`= \'$straat\',\n"
. " `kl_postcode`= $post,\n"
. " `kl_gemeente`= \'$gemeente\',\n"
. " `kl_huisnr`= $huisnr,\n"
. " `kl_firmanaam`= \'$firma\',\n"
. " `kl_btwnr`= \'$btwnr\'\n"
. "WHERE `klant_id`= $name");
}else {
echo "werkt niet";
}
echo "voorbij query";
mysqli_close($con);
}
html
<form name="regForm" method="post" action="<?php $_PHP_SELF ?>" onsubmit="return(validateRegistreer());">
<table width="400" border="0" cellspacing="1" cellpadding="2">
<tr>
<td >Aanspreek titel</td>
<td><select name="kl_aanspreek" id="kl_aanspreek">
<option value="Dhr.">Dhr.</option>
<option value="Mevr.">Mevr.</option>
</select>
</td>
</tr>
<tr>
<td >Voornaam *</td>
<td><input name="kl_voornaam" type="text" id="kl_voornaam" required value="<?php echo $voornaam ?>"></td>
</tr>
<tr>
<td >Achternaam *</td>
<td><input name="kl_achternaam" type="text" id="kl_achternaam" required value="<?php echo $achternaam ?>"></td>
</tr>
the code of the table repeat itself
<tr>
<td width="100"> </td>
<td>
<input name="btnSignup" type="submit" id="btnSignup" value="Wijzig" >
</td>
</tr>
</table>

Answer 1

try next
$query = "UPDATE tbl_klant SET kl_aanspreek= '$aansp',
kl_voornaam= '$voornaam'
kl_achternaam= '$achternaam',
kl_email= '$email',
kl_gsm= '$gsm' ,
kl_fax= '$fax' ,
kl_telefoon= '$telefoon',
kl_straat= '$straat',
kl_postcode= '$post',
kl_gemeente= '$gemeente',
kl_huisnr= '$huisnr',
kl_firmanaam= '$firma',
kl_btwnr= '$btwnr'
WHERE klant_id= '$name'";
mysqli_query($con,$query);

Answer 2

Try :
if(isset($_POST['btnSignup']))
{
$con=mysqli_connect('test', 'test', 'test', 'test');
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
if (isset($name)) {
if(!mysqli_query($con,
"UPDATE `tbl_klant` "
. " SET `kl_aanspreek`= '$aansp',"
. " `kl_voornaam`= '$voornaam',"
. " `kl_achternaam`= '$achternaam',"
. " `kl_email`= '$email',"
. " `kl_gsm`= $gsm ,"
. " `kl_fax`= $fax ,"
. " `kl_telefoon`= $telefoon,"
. " `kl_straat`= '$straat',"
. " `kl_postcode`= $post,"
. " `kl_gemeente`= '$gemeente',"
. " `kl_huisnr`= $huisnr,"
. " `kl_firmanaam`= '$firma',"
. " `kl_btwnr`= '$btwnr'"
. " WHERE `klant_id`= $name")){
echo("Error description: " . mysqli_error($con));
}
}else {
echo "werkt niet";
}
echo "voorbij query";
mysqli_close($con);
}