PHP数组没有使用json_encode转换为JSON [duplicate]

Question

This question already has an answer here:

• How to solve JSON_ERROR_UTF8 error in php json_decode? 4 answers

I am trying to convert my $response array to JSON but it is not converting. I tried to echo the values in the array to be sure that it is not null.

    if($row['count(*)']>0)
    {
        $sql="select * from guide_city_detail where CITY='$place'";
        $result = $conn->query($sql);
        $row = $result1->fetch_assoc();
        $row = array_map('utf8_encode', $row);
        $response['status']=1;
        $response['city']=$row['CITY'];
        $response['state']=$row['STATE'];
        $response['country']=$row['COUNTRY'];
        $response['heads']=$row['HEADS'];
        $response['col1']=$row['COL1'];
        $response['col2']=$row['COL2'];
        $response['col3']=$row['COL3'];
        $response['col4']=$row['COL4'];
        $response['col5']=$row['COL5'];
        $response['col6']=$row['COL6'];
        $response['col7']=$row['COL7'];
        $response['col8']=$row['COL8'];
        $response['col9']=$row['COL9'];
        //echo $response['country'];
    }
    else
    {
        $response['status']=0;// save the entry for future references
        $output = shell_exec("java -cp \".;D:/letsgo/mysql.jar;D:/letsgo/jsoup.jar;\" GeneralPopulate $place 2>&1");
        //echo "$output";
    }
    $res=json_encode($response);
    echo $res;
}

</div>

Answer 1

If json_last_error gives you the JSON_ERROR_UTF8 error code (5), then you will have to encode your datas in UTF-8 :

Need to convert final array to utf-8.

<?php

$response = array_map('utf8_encode', $response);