Error coming when table is empty in mysql, How to solve? - php

Question

I have query in php
select
c.*,
CONCAT(c.first_name, ' ' ,c.middle_name, ' ' ,c.last_name) as name,
r.paid_amount as total_amount_paid,
r.emi_date as emi_date_from_reciept,
ltc.loan_amount as total_remaining_loan_amount ,
ltc.emi_date as emi_loan_date,
ltc.no_of_month as num_of_months_from_ltc
FROM loan_to_customer ltc
LEFT JOIN customer c ON ltc.customer_id = c.customer_id
LEFT JOIN receipt r ON r.customer_id = c.customer_id
WHERE c.cust_mobile = '$cust_mobile' OR c.unique_no = '$unique_no'
I am getting this error
You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1`
I am getting this error while my table is empty.
If I execute this on phpmyadmin it simply run and success.
My php code is like this
<?php
include "connection.php";
extract($_REQUEST);
$data = array();
$resArr = array();
$query = customSelectQuery("select c.*, CONCAT(c.first_name, ' ' ,c.middle_name, ' ' ,c.last_name) as name,r.paid_amount as total_amount_paid,
r.emi_date as emi_date_from_reciept, ltc.loan_amount as total_remaining_loan_amount ,
ltc.emi_date as emi_loan_date, ltc.no_of_month as num_of_months_from_ltc FROM loan_to_customer ltc
LEFT JOIN customer c ON ltc.customer_id = c.customer_id
LEFT JOIN receipt r ON r.customer_id = c.customer_id
WHERE c.cust_mobile = '$cust_mobile' OR c.unique_no = '$unique_no'");
if (isset($query)) {
$ltc_data = array();
foreach ($query as $row) {
$ltc_data = array(
'loan_amount' => $row['loan_amount'],
'total_remaining_loan_amount' => $row['total_remaining_loan_amount'],
'no_of_month' => $row['no_of_month'],
"num_of_months_from_ltc"=>$row['num_of_months_from_ltc'],
"emi_date_from_reciept" => $row['emi_date_from_reciept'],
"customer_id"=>$row['customer_id'],
);
}
}
$customer_id = $ltc_data['customer_id'];
$query1 = customSelectQuery("SELECT * FROM receipt WHERE customer_id = $customer_id");
$penalty_amoount = '100';
$paid_emi_date = array();
foreach ($query1 as $row1) {
$paid_emi_date[] = array('date'=>$row1['emi_date'],'amount'=>$row1['paid_amount'], 'penalty_amoount'=>$penalty_amoount);
}
$loan_amount = $ltc_data['loan_amount'];
$total_remaining_loan_amount = $ltc_data['total_remaining_loan_amount'];
$total_amount_paid = $loan_amount - $total_remaining_loan_amount;
$no_of_month = $ltc_data['no_of_month'];
$num_of_months_from_ltc = $ltc_data['num_of_months_from_ltc'];
$total_paid_emi_month = $no_of_month - $num_of_months_from_ltc;
$penalty_amoount1 = '20';
if (sizeOf($query) > 0) {
$d = array();
foreach ($query as $row) {
// $output = [];
foreach ( explode(',', $row['emi_loan_date']) as $date ) {
$output[] = ['date' => $date, 'emi_amount' => $row['emi_amount'], 'penalty_amoount'=>$penalty_amoount1];
}
$emi_date1 = $output[0]['date'];
$emi_a = $output[0]['emi_amount'];
$p_amo = $output[0]['penalty_amoount'];
$f_a = $emi_a + $p_amo;
$d[] = array(
"name" => $row['name'],
"Loan_Account_No" => $row['unique_no'],
"product_amount"=> $row['product_amount'],
"num_of_months" => $row['num_of_months'],
"no_of_month" => $no_of_month,
"loan_amount" => $row['loan_amount'],
"total_paid_emi_month" =>$total_paid_emi_month,
'total_amount_paid' => $total_amount_paid,
'total_remaining_loan_amount' => $row['total_remaining_loan_amount'],
"pending_emi_amount"=>$f_a,
"pending_emi_date"=>$emi_date1,
// "emi_date1" => explode(',', $row['emi_loan_date']),
"emi_date1" =>$output,
"paid_emi_date"=> $paid_emi_date,
"start_emi_date"=> $row['loan_date'],
"emi_amount"=> $row['emi_amount'],
// "emi_pending_amount"=>
);
}
}
if($d === null){
$d = " ";
$message = "not found loan data.";
}
$resArr = array("success" => 1, "data" => $d, "message" => $message);
header('Content-Type: application/json');
echo str_replace("\/", "/", json_encode($resArr, JSON_UNESCAPED_UNICODE));
?>

Answer 1

replace '$cust_mobile' by '\''.$cust_mobile.'\'' and '$unique_no' by '\''.$unique_no.'\''. Because $cust_mobile and $unique_no are variables
select c.*, CONCAT(c.first_name, ' ' ,c.middle_name, ' ' ,c.last_name) as name,r.paid_amount as total_amount_paid,
r.emi_date as emi_date_from_reciept, ltc.loan_amount as total_remaining_loan_amount ,
ltc.emi_date as emi_loan_date, ltc.no_of_month as num_of_months_from_ltc FROM loan_to_customer ltc
LEFT JOIN customer c ON ltc.customer_id = c.customer_id
LEFT JOIN receipt r ON r.customer_id = c.customer_id
WHERE c.cust_mobile = '\''.$cust_mobile.'\'' OR c.unique_no = '\''.$unique_no.'\''