如何使用php遍历此json并将其中的项目添加到mysqli数据库？

Question

I am trying to allow an android user to replace a database table. My app reads in a excel spreadsheet from the phone, adds each row into a json, and then serializes the json to get a string:

[{"name":"catheter","alts":"cathater, cathiter, cath","num":"134"}, 
{"name":"cast","alts":"","num":"2212"}]

My app then sends the serializes json to a php file on my server where I

var_dump(json_decode($serializedString));

to get to the array in question:

array(2) {  [0]=>  object(stdClass)#2 (4) {    ["name"]=>    string(8) 
"catheter"    ["alts"]=>    string(24) "cathater, cathiter, cath"    
["num"]=>    string(3) "134"    }  [1]=>  object(stdClass)#3 (4) {    
["name"]=>    string(4) "cast"    ["alts"]=>    string(0) ""    
["number"]=>    string(0) ""    }}

I'm php stupid, but I have tried a BUNCH of stuff. This will tell me how many items there are in the array:

$count = 0;
$something = json_decode($serializedJsonString, true);
foreach($something as $obj){
    $count = $count+1;
}
echo $count;

I really need to be able to refer to each items key-value pairs so I can add them to a database which has columns for name, alt_names, and number. Thanks a bundle.

Answer 1

May be this can help you :

$serializedString= '[{"name":"catheter","alts":"cathater, cathiter, cath","num":"134"}, 
{"name":"cast","alts":"","num":"2212"}]';

$res = json_decode($serializedString, true);

function for isert data (call it while looping the array)

function insert($element , $mysqli){
    if(isset($element['name']) && isset($element['alts']) && isset($element['num'])){
     $stmt = $mysqli->prepare("INSERT INTO myTable (name, alt_names,number ) VALUES (?, ?, ?)");
     $stmt->bind_param($element['name'], $element['alts'],$element['num']);
     $stmt->execute();
     $stmt->close();
   }

}

your main script :

$host = 'insert here the host';
$db = 'name of your database';
$username= 'db username';
$password = 'password db';


 // create database connection
 $mysqli = new mysqli($host, $username, $password, $db);
 $mysqli->set_charset("utf8mb4");
 $mysqli->autocommit(FALSE); // manage transaction

foreach($res as $key => $value){
   insert($value,$mysqli);
}
$mysqli->commit();

Answer 2

$count = 0;
$something = json_decode($serializedJsonString, true);
foreach($arr as $item){
    $name = $item["name"];
    $alts = $item["alts"];
    $num = $item["num"];
//make insert query here.
}

Answer 3

You could do something like this:

$db = new MySQLi(HOST, USER, PASS, SCHEMA, PORT);

$count = 0;
$elems = json_decode($serializedJsonString, true);

$stmt = $db->prepare('INSERT INTO items (name, alt_names, number) VALUES (?,?,?)');

$db->begin_transaction();
foreach($elems as $elem){
    $stmt->bind_param("ssi", $elem['name'], $elem['alts'], $elem['num']);
    $stmt->execute();
    $count = $count+1;
}

$stmt->close();
$db->commit();
$db->close();
echo $count;

This is also safe against any SQL injection . And I've supposed that location and id are nullable and not available at the moment of this operation.