how to use conditional operator in php - php

Question

$sql = "INSERT INTO `employee_master` ( em_first_name, em_middle_name, em_last_name, em_gender, em_DOB, em_DOJ, em_mobile_no, em_alternate_mobile_no, em_landline_no, em_permanent_address, em_corresponding_address, em_email_id ) VALUES(
'" . $params["txtFirstName"] . "',
'" . $params["txtMiddleName"] . "',
'" . $params["txtLastName"] . "',
'" . $params["selGender"] . "',
'" . $params["txtDOB"] . "',
'" . $params["txtDOJ"] . "',
'" . $params["txtMobileNo"] . "',
'" . $params["txtAlternateMobileNo"] . "',
'" . $params["txtLandlineNo"] . "',
'" . $params["txtPermanentAddressTextarea"] . "',
'" . $params["txtCorrespondingAddressTextarea"] . "',
'" . $params["txtEmailID"] . "'); ";
//echo $sql;
echo $result = mysqli_query($this->conn, $sql) or die("Error to insert User.");
}
($('#selReligion').val() == -1 ) ? " " : $('#selReligion').val(),
Here I want to use Conditional operator.
Right Now..if selGender is null that It inserts -1
but i want to insert 0 or null

Answer 1

Use the ternary operator. It will insert the 0 instead of -1, as you require.
if $params["selGender"] will not be null then it will insert the value otherwise 0. and you can change the condition in that according to your need.
'" . (!empty($params["selGender"])) ? $params["selGender"] : 0 . "',
EDITED:
Other way to achieve this is:
Take a variable:
$selGender = '0';
if(!empty($params["selGender"]))
$selGender = $params["selGender"];
And then use this variable:
'" . $selGender . "',