我是程序员的初学者，我正在学习。如果我的问题太糟糕，我很抱歉。
我想从 api 内容在 php 中创建变量，例如：
此内容来自此 URL：http://example.com/api
{"name"："John"，"age"："20"，"genre"："male"，"language"：[{"id"："22"，"name"："english"}，{"id"："23"，"name"："French"}]}
<?php
$content = file_get_contents("http://example.com/api");
$content = str_replace('"', "", $content);
$content = str_replace(":", "=", $content);
$content = str_replace(",", "&", $content);
parse_str($content);
echo $name; //John
echo $age; //20
echo $genre; //male
echo $language //[{id <======== here is my problem
?>
我的问题是当我得到一个像"语言"这样的数组时，如何解决它？
感谢您的帮助。
您可以通过两种方式使用该 http://www.php.net/json_decode：
这是面向对象的：
$str = '{"name":"John","age":"20","genre":"male","language":[{"id":"22","name":"english"},{"id":"23","name":"french"}]}';
$json = json_decode($str);
echo 'name: ' . $json->{'name'} .'<br>';
echo 'age: ' . $json->{'age'} .'<br>';
echo 'genre: ' . $json->{'genre'} . '<br>';
foreach($json->{'language'} as $data){
echo 'id: ' . $data->{'id'} . '<br>';
echo 'name: ' . $data->{'name'} . '<br>';
}
作为关联数组：
$json = json_decode($str, true);
echo 'name: ' . $json['name'] .'<br>';
echo 'age: ' . $json['age'] .'<br>';
echo 'genre: ' . $json['genre'] . '<br>';
foreach($json['language'] as $data){
echo 'id: ' . $data['id'] . '<br>';
echo 'name: ' . $data['name'] . '<br>';
}
json_decode()将帮助您将字符串数据转换为更易于访问的内容：
<?php
// Instead of your fetched data we use static example data in this script
//$content = file_get_contents("http://example.com/api");
$content = '{"name":"John","age":"20","genre":"male","language":[{"id":"22","name":"english"},{"id":"23","name":"french"}]}';
// Convert json data to object
$data = json_decode($content);
// access object properties by using "->" operator
echo $data->name;
echo $data->age;
echo $data->genre;
// language is an array of objects, so let's look at each language object...
foreach($data->language as $lang) {
// ... and extract data using "->" again
echo $lang->id;
echo $lang->name;
}
可以在 http://sandbox.onlinephpfunctions.com/code/6df679c3faa8fff43308a34fb80b2eeb0ccfe47c
正如@fusionK所指出的，来自 api 请求的响应是一个 json 字符串，因此使用 json_decode 转换为对象（或数组，如果首选）（数组json_decode( $data,true )）
解码后，可以直接访问对象的属性。
<?php
/* capture and decode response from api - creates an object */
$content = json_decode( file_get_contents("http://example.com/api") );
/* using object notation to access properties */
echo $content->name.' '.$content->age.' '.$content->genre;
/* for the language which is an array of objects */
$lang=$content->language;
foreach( $lang as $language ){
$obj=(object)$language;
echo $obj->id.' '.$obj->name;
}
?>