我是一个试图在世界上找到自己的方式的新手程序员。我已经掌握了JSON数据，我试图解析为SQL语句以填充多个数据库表。我想循环遍历数组的每个维度并提取它的特定部分以创建一个INSERT语句，我可以传递给MySQL。我不确定这是否是使用一个JSON文件中的数据填充单独表格的最佳方法，但这是我唯一能想到的。 MySQL表是分开的，因此有一个人的表，一个地址类型的表，一个地址表，一个电话表，一个电子邮件表等。这是为了记录有多个电话号码的人员记录，电子邮件地址等
我已经能够从外部URL解码JSON。以下是使用print_r的输出代码和示例。
$json_string = 'http://....';
$jsondata = file_get_contents($json_string);
$data = json_decode($jsondata, TRUE);
1记录样本：
Array ( [objects] => Array ( [0] => Array ( [first_name] => Anthony [last_name] => Perruzza [name] => Anthony Perruzza [elected_office] => City councillor [url] => http://www.toronto.ca/councillors/perruzza1.htm [gender] => [extra] => Array ( ) [related] => Array ( [boundary_url] => /boundaries/toronto-wards/york-west-8/ [representative_set_url] => /representative-sets/toronto-city-council/ ) [source_url] => http://www.toronto.ca/councillors/perruzza1.htm [offices] => Array ( [0] => Array ( [tel] => 416-338-5335 ) ) [representative_set_name] => Toronto City Council [party_name] => [district_name] => York West (8) [email] => councillor_perruzza@toronto.ca [personal_url] => [photo_url] => ) ) [meta] => Array ( [next] => /representatives/?limit=1&offset=1 [total_count] => 1059 [previous] => [limit] => 1 [offset] => 0 ) )
JSON代码示例：
{"objects": [
{"first_name": "Keith",
"last_name": "Ashfield",
"name": "Keith Ashfield",
"elected_office": "MP",
"url": "http://www.parl.gc.ca/MembersOfParliament/ProfileMP.aspx?Key=170143&Language=E",
"gender": "",
"extra": {},
"related": {
"boundary_url": "/boundaries/federal-electoral-districts/13003/",
"representative_set_url": "/representative-sets/house-of-commons/"
},
"source_url": "http://www.parl.gc.ca/MembersOfParliament/MainMPsCompleteList.aspx?TimePeriod=Current&Language=E",
"offices": [
{ "type": "legislature",
"fax": "613-996-9955",
"postal": "House of Commons\nOttawa, Ontario\nK1A 0A6",
"tel": "613-992-1067"
},
{ "type": "constituency",
"fax": "506-452-4076",
"postal": "23 Alison Blvd (Main Office)\nFredericton, New Brunswick\nE3C 2N5",
"tel": "506-452-4110"
}
],
"representative_set_name": "House of Commons",
"party_name": "Conservative",
"district_name": "Fredericton",
"email": "keith.ashfield@parl.gc.ca",
"personal_url": "",
"photo_url": "http://www.parl.gc.ca/MembersOfParliament/Images/OfficialMPPhotos/41/AshfieldKeith_CPC.jpg"
}
],
"meta": {
"next": "/representatives/house-of-commons/?limit=1&offset=1",
"total_count": 307,
"previous": null,
"limit": 1,
"offset": 0
}
}
非常感谢您提供的任何帮助。在过去的几天里，我一直想把头发拉出去试图找出来。
我已尝试自定义以下代码以使其正常工作，但我还没有能够达到最佳效果。请注意，此代码不会引用我的数据或变量。我删除了对我不起作用的内容。我只想把它包括在内，让你知道我尝试过的东西。
foreach ($data as $item) {
echo $item->{'first_name'} . "<br/>";
echo $item->{'last_name'};
}
如果你能指出我能够从阵列的任何级别解析数据的方向，我们将不胜感激。
最佳，
取值
答案 0 :(得分：3)
AFAIK，无法插入带有一个插入的多个表格。此外，您需要保持数据完整性，因此相关表将具有正确的外键。
一般的想法是迭代数据，插入记录并记住插入的id，然后将它们写为相应的外键。
您通过对象进行迭代，将所有基本属性作为字段插入，然后使用id获取mysql_last_insert_id，然后在保存办公室（或其详细信息）时将id作为相关内容对象id。
E.g。我们有以下JSON。
{"authors": [
{"first_name": "John",
"last_name": "Doe",
"books": [{
"title": "Capture the flag",
"ISBN": "123-456789-12345",
},{
"title": "Deathmatch",
"ISBN": "123-456789-12346",
}]
]}
然后我们使用以下代码插入该数据：
foreach ($data as $author) {
mysql_query("INSERT INTO `authors` (`first_name`, `last_name`), VALUES('{$author->first_name}', '{$author->last_name}') ");
$author_id = mysql_last_insert_id();
foreach ($author->books as $book) {
mysql_query("INSERT INTO `books` (`title`, `isbn`, `author_id`), VALUES('{$book->title}', '{$book->isbn}', '{$author_id}') ");
}
}
这适用于表格中id的自动递增。
当然，您需要在插入之前验证和转义数据等。
答案 1 :(得分：1)
您可以使用以下内容来获取json响应的结构。它以递归方式工作，以便为每个对象创建一个条目，并为每个对象的每个属性创建一个单独表中的条目。我希望得到其他人对此的反馈/增强，并将其转换为创建sql语句。
class DataDriller {
var $ext_obj_to_parse;
var $ext_type_name;
var $data;
var $recurse;
var $ext_type_id;
var $ext_related_id;
var $type_id;
var $auto_create;
var $sql;
var $error;
var $controller;
var $ExtType;
var $ExtStructure;
var $link;
var $ext_source_id;
function init($ExtType, $ExtStructure) {
$this->ExtType = $ExtType;
$this->ExtStructure = $ExtStructure;
}
function setup($ext_obj_to_parse, $ext_type_name, $ext_type_id = false, $ext_related_id = false, $auto_create = true, $ext_source_id) {
$this->ext_obj_to_parse = $ext_obj_to_parse;
$this->ext_type_name = $ext_type_name;
$this->ext_type_id = $ext_type_id;
$this->auto_create = $auto_create;
$this->error = false;
$this->ext_related_id = $ext_related_id;
$this->ext_source_id = $ext_source_id;
if ($this->get_ext_type_data() === false) {
if ($this->type_handling() === false) {
$this->error_data();
}
}
if (gettype($this->ext_obj_to_parse) == "object" || gettype($this->ext_obj_to_parse) == "array") {
$this->to_struct();
} else {
//single variable and data
$this->data[$this->ext_type_name] = gettype($this->ext_obj_to_parse);
$this->sql = "replace into ext_structures (name, data_type, ext_type_id) values ('$this->ext_type_name', '" . gettype($this->ext_obj_to_parse) . "', " . $this->ext_type_id . ")";
$this->sql_it();
}
}
function get_ext_type_data() {
if (is_numeric($this->ext_type_id)) {
return true;
} else if (strlen($this->ext_type_name) > 0) {
$this->sql = "select id From ext_types where name = '" . $this->ext_type_name . "' limit 1";
$this->ext_type_id = $this->sql_it('id');
return $this->ext_type_id;
} else {
return false;
}
}
function type_handling() {
if ($this->auto_create == true && gettype($this->ext_type_name) === "string") {
//$this->sql = "replace into types (name) values ('$this->ext_type_name')";
//
//$this->type_id = $this->sql_it();
//if ($this->type_id !== 0) {
//if ($this->ext_related_id) {
$this->sql = "insert into ext_types (name, ext_source_id, parent_id) values ( '$this->ext_type_name', $this->ext_source_id, '$this->ext_related_id')";
$this->ext_type_id = $this->sql_it();
$this->sql = "replace into ext_type_rel (ext_type_id_1, ext_type_id_2) values ($this->ext_type_id, $this->ext_related_id)";
$this->sql_it();
/*} else {
$this->error = "Unable to obtain typeid from insert";
$this->error_data();
return false;
}*/
}
//}
}
function to_struct() {
//keys are not objects but values can be
//always display keys, when value object - increase spacer - call self - reiterate
// if value is not object complete
foreach ($this->ext_obj_to_parse as $key => $value) {
if (gettype($value) == "object" || gettype($value) == "array") {
//check to see if object exists within the database with the data definitions and methods
//there are no existing data structure insert
//recurse into the drill-down again if it does not exist
if (is_numeric($key) || $key == "data" || $key == "statuses") {
$this->recurse = new DataDriller();
if (!$this->ext_related_id > 0){ $this->ext_related_it = $this->ext_type_id; }
$this->recurse->setup($value, $this->ext_type_name, $this->ext_type_id, $this->ext_related_id, true, $this->ext_source_id);
} else {
$this->recurse = new DataDriller();
$this->recurse->setup($value, $key, false, $this->ext_type_id, true, $this->ext_source_id);
}
$this->data[$key] = $this->recurse->data;
unset($this->recurse);
//this is where we insert the relationship between objects here
} else {
//not an ojbect just a field of the existing object
$this->data[$key] = gettype($value);
$this->sql = "replace into ext_structures (name, data_type, ext_type_id) values ('$key', '" . gettype($value) . "', " . $this->ext_type_id . ")";
$this->sql_it();
}
}
}
function sql_it($field_name = false) {
$VARDB_server = '192.168.10....';
$VARDB_port = '3306';
$VARDB_user = 'user';
$VARDB_pass = 'pass';
$VARDB_database = 'db_name';
$this->link = mysql_connect("$VARDB_server:$VARDB_port", "$VARDB_user", "$VARDB_pass");
if (!$this->link) {
echo 'MySQL connect ERROR: ' . mysql_error();
die();
}
$res = mysql_select_db("$VARDB_database");
if (!$res) {
echo mysql_error();
}
$res = mysql_query($this->sql, $this->link);
if (mysql_error()) {
$this->error = mysql_error() . " MYSQL reported an error " . $this->sql;
CakeLog::write('datadriller', $this->sql . " error? " . mysql_error());
die();
}
if ($field_name === false) {
if (strpos($this->sql, 'insert') !== false || strpos($this->sql, 'replace') !== false) {
$id = mysql_insert_id();
return $id;
} else {
$this->error = "field name is requeired for getting results";
$this->error_data();
return false;
}
} else {
if (mysql_num_rows($res) > 0) {
$r = mysql_fetch_array($res);
mysql_free_result($res);
if (array_key_exists($field_name, $r)) {
return $r[$field_name];
} else {
$this->error = "field name does not exist in result set";
$this->error_data();
return false;
}
} else {
$this->error = "select statement returned no data ";
return false;
}
}
}
function error_data() {
echo "<B> $this->error MySQL error? <font color=red>" . mysql_error() . " </font> SQL: $this->sql </b><BR><BR>\n";
echo "DUMP DATA\n";
echo "<pre>";
var_dump($this->data);
echo "RECURSED OBJECT \n\n";
var_dump($this->recurse);
echo "</pre>";
}
答案 2 :(得分：0)
function JSONTOInsertSQL($table,$obj){
$keys = implode('`,`', array_map('addslashes', array_keys($obj)));
$values = implode("','", array_map('addslashes', array_values($obj)));
return "INSERT INTO `$table` (`$keys`) VALUES ('$values')";
}