我有以下回应：
[
{
"id":128412,
"date":"2019-02-20T09:20:26",
"date_gmt":"2019-02-20T09:20:26",
"guid":{
"rendered":"https:\/\/www.example.it\/francesca\/"
},
"modified":"2019-02-20T09:20:26",
"modified_gmt":"2019-02-20T09:20:26",
"slug":"francesca",
"status":"publish",
"type":"post",
"link":"https:\/\/www.example.it\/francesca\/",
"title":{
"rendered":"Francesca"
},
"content":{
"rendered":"<p>Ero uscito per una passeggiata con il mio cane,<br \/>e ho incontrato Francesca e Machete.<br \/>Oggi siamo una famiglia \ud83d\ude42<\/p>\n",
"protected":false
},
"excerpt":{
"rendered":"<p class=\"card-text dark\">Ero uscito per una passeggiata con il mio cane,e ho incontrato Francesca […]<\/p>\n",
"protected":false
},
"author":55,
"featured_media":128413,
"comment_status":"closed",
"ping_status":"open",
"sticky":false,
"template":"",
"format":"standard",
"meta":[
],
"categories":[
139,
749,
506
],
"tags":[
750,
745,
643
],
"usp-custom-90":"45.5013777661607,9.21768474999999",
"_links":{
"self":[
{
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/posts\/128412"
}
],
"collection":[
{
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/posts"
}
],
"about":[
{
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/types\/post"
}
],
"author":[
{
"embeddable":true,
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/users\/55"
}
],
"replies":[
{
"embeddable":true,
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/comments?post=128412"
}
],
"version-history":[
{
"count":0,
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/posts\/128412\/revisions"
}
],
"wp:featuredmedia":[
{
"embeddable":true,
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/media\/128413"
}
],
"wp:attachment":[
{
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/media?parent=128412"
}
],
"wp:term":[
{
"taxonomy":"category",
"embeddable":true,
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/categories?post=128412"
},
{
"taxonomy":"post_tag",
"embeddable":true,
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/tags?post=128412"
}
],
"curies":[
{
"name":"wp",
"href":"https:\/\/api.w.org\/{rel}",
"templated":true
}
]
},
"_embedded":{
"author":[
{
"id":55,
"name":"Antonio Forina",
"url":"",
"description":"",
"link":"https:\/\/www.example.it\/author\/antonio\/",
"slug":"antonio",
"avatar_urls":{
"24":"https:\/\/secure.gravatar.com\/avatar\/7cab78abf9b71cd25f5660d4dbbe9d25?s=24&d=mm&r=g",
"48":"https:\/\/secure.gravatar.com\/avatar\/7cab78abf9b71cd25f5660d4dbbe9d25?s=48&d=mm&r=g",
"96":"https:\/\/secure.gravatar.com\/avatar\/7cab78abf9b71cd25f5660d4dbbe9d25?s=96&d=mm&r=g"
},
"_links":{
"self":[
{
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/users\/55"
}
],
"collection":[
{
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/users"
}
]
}
}
],
"wp:featuredmedia":[
{
"id":128413,
"date":"2019-02-20T09:20:26",
"slug":"2019-02-20_5c6d1bdabff9a_tanzballerina-1281",
"type":"attachment",
"link":"https:\/\/www.example.it\/francesca\/2019-02-20_5c6d1bdabff9a_tanzballerina-1281\/",
"title":{
"rendered":"2019-02-20_5c6d1bdabff9a_tanzballerina-1281"
},
"author":55,
"caption":{
"rendered":"<p class=\"card-text dark\">\n"
},
"alt_text":"",
"media_type":"image",
"mime_type":"image\/jpeg",
"media_details":{
"width":640,
"height":427,
"file":"2019\/02\/2019-02-20_5c6d1bdabff9a_tanzballerina-1281.jpeg",
"sizes":{
"thumbnail":{
"file":"2019-02-20_5c6d1bdabff9a_tanzballerina-1281-150x150.jpeg",
"width":"150",
"height":"150",
"mime_type":"image\/jpeg",
"source_url":"https:\/\/www.example.it\/wp-content\/uploads\/2019\/02\/2019-02-20_5c6d1bdabff9a_tanzballerina-1281-150x150.jpeg"
},
"medium":{
"file":"2019-02-20_5c6d1bdabff9a_tanzballerina-1281-280x187.jpeg",
"width":"280",
"height":"187",
"mime_type":"image\/jpeg",
"source_url":"https:\/\/www.example.it\/wp-content\/uploads\/2019\/02\/2019-02-20_5c6d1bdabff9a_tanzballerina-1281-280x187.jpeg"
},
"alm-thumbnail":{
"file":"2019-02-20_5c6d1bdabff9a_tanzballerina-1281-150x150.jpeg",
"width":"150",
"height":"150",
"mime_type":"image\/jpeg",
"source_url":"https:\/\/www.example.it\/wp-content\/uploads\/2019\/02\/2019-02-20_5c6d1bdabff9a_tanzballerina-1281-150x150.jpeg"
},
"full":{
"file":"2019-02-20_5c6d1bdabff9a_tanzballerina-1281.jpeg",
"width":640,
"height":427,
"mime_type":"image\/jpeg",
"source_url":"https:\/\/www.example.it\/wp-content\/uploads\/2019\/02\/2019-02-20_5c6d1bdabff9a_tanzballerina-1281.jpeg"
}
},
"image_meta":{
"aperture":"7.1",
"credit":"",
"camera":"NIKON D5200",
"caption":"",
"created_timestamp":"1480250162",
"copyright":"",
"focal_length":"52",
"iso":"200",
"shutter_speed":"0.00625",
"title":"",
"orientation":"0"
}
},
"source_url":"https:\/\/www.example.it\/wp-content\/uploads\/2019\/02\/2019-02-20_5c6d1bdabff9a_tanzballerina-1281.jpeg",
"_links":{
"self":[
{
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/media\/128413"
}
],
"collection":[
{
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/media"
}
],
"about":[
{
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/types\/attachment"
}
],
"author":[
{
"embeddable":true,
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/users\/55"
}
],
"replies":[
{
"embeddable":true,
"href":"https:\/\/www.example.it\/wp-json\/wp\/v2\/comments?post=128413"
}
]
}
}
],
答案 0 :(得分：4)
代替
$content->{"_embedded"}->{"wp:featuredmedia"}->sizes->thumbnail->{"source_url"}
尝试
$content['_embedded']['wp:featuredmedia'][0]['media_details']['sizes']['thumbnail']['source_url'];
答案 1 :(得分：1)
为json_decode（）的第二个参数提供true会使该函数返回一个关联数组，因此您尝试的第一个代码将不起作用，第二个是正确的。
根据您的数据，应该是$content['_embedded']['wp:featuredmedia'][0]['media_details']['sizes']['thumbnail']['source_url']之类的东西。
在任何情况下，您都可以对$ contents变量执行var_dump（）以确保对象的结构符合您的期望。