PHP code with oci - php

Question

For email validation, the condition for checking email exist or not is failed to function and I still able to register using same email. This is code for email validation
if ( !filter_var($bemail,FILTER_VALIDATE_EMAIL) ) {
$error = true;
$emailError = "Please enter valid email address.";
} else {
**// check email exist or not**
$result = oci_parse($connection,"SELECT BUSER_EMAIL FROM
POHSENG.BRONTE_USER WHERE BUSER_EMAIL= $bemail");
$count = oci_num_rows($result);
if($count!=0){
$error = true;
$emailError = "Provided Email is already in use.";
}
This is overall php code. I tried a lot of way to modify but it is not work at all, while in mysqli it is working.
<?php
require 'oci_connect_hugo.php';
$error = false;
$count="";
$bname="";
$bemail="";
$baddress="";
$bpass="";
$nameError = "";
$emailError ="";
$addError ="";
$passError = "";
if ( isset($_POST['signup']) ) {
// clean user inputs to prevent sql injections
$bname = trim($_POST['bname']);
$bname = strip_tags($bname);
$bname = htmlspecialchars($bname);
$bemail = trim($_POST['bemail']);
$bemail = strip_tags($bemail);
$bemail = htmlspecialchars($bemail);
$baddress =trim($_POST['baddress']);
$baddress = strip_tags($baddress);
$baddress = htmlspecialchars($baddress);
$bpass = trim($_POST['bpass']);
$bpass = strip_tags($bpass);
$bpass = htmlspecialchars($bpass);
// basic name validation
if (empty($bname)) {
$error = true;
$nameError = "Please enter your full name.";
} else if (strlen($bname) < 3) {
$error = true;
$nameError = "Name must have at least 3 characters.";
} else if (!preg_match("/^[a-zA-Z ]+$/",$bname)) {
$error = true;
$nameError = "Name must contain alphabets and space.";
}
//basic email validation
if ( !filter_var($bemail,FILTER_VALIDATE_EMAIL) ) {
$error = true;
$emailError = "Please enter valid email address.";
} else {
**// check email exist or not**
$result = oci_parse($connection,"SELECT BUSER_EMAIL FROM
POHSENG.BRONTE_USER WHERE BUSER_EMAIL= $bemail");
$count = oci_num_rows($result);
if($count!=0){
$error = true;
$emailError = "Provided Email is already in use.";
}
if (empty($baddress)) {
$error = true;
$addError = "Please enter your address.";
}
// password validation
if (empty($bpass)){
$error = true;
$passError = "Please enter password.";
} else if(strlen($bpass) < 6) {
$error = true;
$passError = "Password must have at least 6 characters.";
}
// password encrypt using SHA256();
$bpass = hash('sha256', $bpass);
// if there's no error, continue to signup
if( !$error ) {
$res = oci_parse($connection,"insert into
POHSENG.BRONTE_USER(BUSER_NAME, BUSER_EMAIL, BUSER_ADDRESS,
BUSER_PASSWORD) VALUES('$bname','$bemail','$baddress','$bpass')");
oci_execute($res);
if ($res) {
$errTyp = "success";
$errMSG = "Successfully registered, you may login now";
unset($bname);
unset($bemail);
unset($bpass);
} else {
$errTyp = "danger";
$errMSG = "Something went wrong, try again later...";
}
}
}
?>