我正在通过php使用Google自定义搜索API，它为我提供了json搜索结果。
如何以 json 格式获取每个结果的发布日期？我看到有"publisheddate":"......"，但我无法输入这个参数，这是我的代码：
<?php
foreach ($result['items'] as $item) {
$link = rawurldecode($item['link']);
?>
<li>
<p class="result-object">
<a href="<?php echo $link; ?>"><img alt="<?php echo htmlentities($item['title']); ?>"
src="<?php $thumbnail = isset($item['pagemap']['metatags'][0]['thumbnailurl']) ? $item['pagemap']['metatags'][0]['thumbnailurl'] : (isset($item['pagemap']['cse_thumbnail'][0]['src']) ? $item['pagemap']['cse_thumbnail'][0]['src'] : (isset($item['pagemap']['cse_image'][0]['src']) ? $item['pagemap']['cse_image'][0]['src'] : './meta/img/thumbnail-default.png'));
echo rawurldecode($thumbnail);?>" /></a>
</p>
<p class="result-description">
<a href="<?php echo $link; ?>"><?php echo $item['htmlTitle']; ?></a>
<br />
<?php echo $item['htmlFormattedUrl']; ?>
<br />
<?php echo $item['htmlSnippet']; ?>
<br />
<?php
echo $item['pagemap']['metatags'][0]['thumbnailurl']; //didn't work
?>
<br />
<?php //echo 'id: '.$sr['cacheId']; ?>
<a class="expand" href="<?php echo $link; ?>">more</a>
<br />
<br />
</p>
</li>
<?php
}
?>
</ul>
<?php
这是 json 结果的示例：
{
"kind": "customsearch#search",
"url": {
"type": "application/json",
"template": "https://www.googleapis.com/customsearch/v1?q={searchTerms}&num={count?}&start={startIndex?}&lr={language?}&safe={safe?}&cx={cx?}&cref={cref?}&sort={sort?}&filter={filter?}&gl={gl?}&cr={cr?}&googlehost={googleHost?}&c2coff={disableCnTwTranslation?}&hq={hq?}&hl={hl?}&siteSearch={siteSearch?}&siteSearchFilter={siteSearchFilter?}&exactTerms={exactTerms?}&excludeTerms={excludeTerms?}&linkSite={linkSite?}&orTerms={orTerms?}&relatedSite={relatedSite?}&dateRestrict={dateRestrict?}&lowRange={lowRange?}&highRange={highRange?}&searchType={searchType}&fileType={fileType?}&rights={rights?}&imgSize={imgSize?}&imgType={imgType?}&imgColorType={imgColorType?}&imgDominantColor={imgDominantColor?}&alt=json"
},
"queries": {
"nextPage": [
{
"title": "Google Custom Search - tramway",
"totalResults": "656000",
"searchTerms": "tramway",
"count": 10,
"startIndex": 11,
"inputEncoding": "utf8",
"outputEncoding": "utf8",
"safe": "off",95794
"cx": "rf:mfcvcqr1viw"
}
],
"request": [
{
"title": "Google Custom Search - tramway",
"totalResults": "656000",
"searchTerms": "tramway",
"count": 10,
"startIndex": 1,
"inputEncoding": "utf8",
"outputEncoding": "utf8",
"safe": "off",
"cx": "...."
}
]
},
"context": {
"title": "api"
},
"searchInformation": {
"searchTime": 0.299961,
"formattedSearchTime": "0.30",
"totalResults": "656000",
"formattedTotalResults": "656,000"
},
"items": [
{
"kind": "customsearch#result",
"title": "Cheap hotels near Palm Springs Aerial Tramway - Hotels.com",
"htmlTitle": "Cheap hotels near Palm Springs Aerial 'u003cb'u003eTramway'u003c/b'u003e - Hotels.com",
"link": "http://www.hotels.com/de1710382/hotels-near-palm-springs-aerial-tramway-palm-springs-united-states-of-america/",
"displayLink": "www.hotels.com",
"snippet": "Compare all hotels based up on average nightly rate and book the cheapest 'nhotels near Palm Springs Aerial Tramway, Palm Springs. Book and save on hotel'n ...",
"htmlSnippet": "Compare all hotels based up on average nightly rate and book the cheapest 'u003cbr'u003e'nhotels near Palm Springs Aerial 'u003cb'u003eTramway'u003c/b'u003e, Palm Springs. Book and save on hotel'u003cbr'u003e'n ...",
"cacheId": "DAhkC4jjOLUJ",
"formattedUrl": "www.hotels.com/.../hotels-near-palm-springs-aerial-tramway-palm-springs- united-states-of-america/",
"htmlFormattedUrl": "www.hotels.com/.../hotels-near-palm-springs-aerial-'u003cb'u003etramway'u003c/b'u003e-palm-springs- united-states-of-america/",
"pagemap": {
"cse_image": [
{
"src": "http://exp.cdn-hotels.com/hotels/8000000/7810000/7808200/7808113/7808113_1_e.jpg"
}
],
"cse_thumbnail": [
{
"width": "128",
"height": "72",
"src": "https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcSfzrwon7PFVDPKZ4zHkwCig3q2psBZyWI3fcx8mK27AQF1myh9qknoJQc"
}
],
"article": [
{
"name": "Palm Springs Aerial Tramway hotels, Palm Springs",
"articlebody": "Palm Springs Aerial Tramway in the Palm Springs area, California Are you looking for a cheap Palm Springs Aerial Tramway hotel, a 5 star Palm Springs Aerial Tramway hotel or a family friendly..."
}
],
"webpage": [
{
"breadcrumb": "HotelsUnited States of America HotelsCalifornia hotelsHotels in Palm SpringsHotels near Palm Springs Aerial Tramway",
"name": "Hotels",
"url": "Hotels"
}
],
"Breadcrumb": [
{
"title": "Hotels",
"url": "Hotels"
},
{
"title": "United States of America Hotels",
"url": "United States of America Hotels"
},
{
"title": "California hotels",
"url": "California hotels"
},
{
"title": "Hotels in Palm Springs",
"url": "Hotels in Palm Springs"
}
],
"hotel": [
{
"url": "The New Palm Springs Inn",
"name": "The New Palm Springs Inn"
},
{
"url": "Days Inn Palm Springs",
"name": "Days Inn Palm Springs"
},
{
"url": "The Monroe Palm Springs",
"name": "The Monroe Palm Springs"
},
{
"url": "Ivy Palm Resort & Spa",
"name": "Ivy Palm Resort & Spa"
},
{
"url": "The Mediterraneo Resort",
"name": "The Mediterraneo Resort"
},
{
"url": "The Palm Springs Hotel",
"name": "The Palm Springs Hotel"
},
{
"url": "The D Resort",
"name": "The D Resort"
},
{
"url": "Tuscany Manor Resort",
"name": "Tuscany Manor Resort"
},
{
"url": "Garden Vista Hotel",
"name": "Garden Vista Hotel"
},
{
"url": "Desert Vacation Villas",
"name": "Desert Vacation Villas"
}
],
"metatags": [
{
"title": "Cheap hotels near Palm Springs Aerial Tramway - Hotels.com",
"fb:app_id": "105208249622845",
"og:type": "website",
"og:title": "Cheap hotels near Palm Springs Aerial Tramway - Hotels.com",
"og:description": "Compare all hotels based up on average nightly rate and book the cheapest hotels near Palm Springs Aerial Tramway, Palm Springs. Book and save on hotel rooms near to Palm Springs Aerial Tramway in California with our last minute Palm Springs Aerial Tramway deals & offers.",
"og:image": "http://a1.cdn-hotels.com/static/common/64.0/images/common/logos/h_onebrand_119x100.png",
"og:url": "http://www.hotels.com/de1710382/hotels-near-palm-springs-aerial-tramway-palm-springs-united-states-of-america/",
"skype_toolbar": "SKYPE_TOOLBAR_PARSER_COMPATIBLE"
}
],
"place": [
{
"name": "Popular with travelers from US"
}
]
}
},
{
"kind": "customsearch#result",
"title": "Tramway V -- Encyclopedia Britannica",
"htmlTitle": "'u003cb'u003eTramway'u003c/b'u003e V -- Encyclopedia Britannica",
"link": "http://www.britannica.com/EBchecked/topic/1782196/Tramway-V",
"displayLink": "www.britannica.com",
"snippet": "Tramway V. ... are finished and click submit, your modifications will be sent to our 'neditors for review. The topic Tramway V is discussed in the following articles: ...",
"htmlSnippet": "'u003cb'u003eTramway'u003c/b'u003e V. ... are finished and click submit, your modifications will be sent to our 'u003cbr'u003e'neditors for review. The topic 'u003cb'u003eTramway'u003c/b'u003e V is discussed in the following articles: ...",
"cacheId": "5iMaVHaHoxoJ",
"formattedUrl": "www.britannica.com/EBchecked/topic/1782196/Tramway-V",
"htmlFormattedUrl": "www.britannica.com/EBchecked/topic/1782196/'u003cb'u003eTramway'u003c/b'u003e-V",
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"metatags": [
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"viewport": "width=device-width, initial-scale=1.0",
"recommendable": "no",
"canonical": "http://www.britannica.com/EBchecked/topic/1782196/Tramway-V",
"og:type": "article",
"og:title": "Tramway V",
"og:description": "Tramway V",
"og:site_name": "Encyclopedia Britannica",
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"Article": [
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"name": "Tramway V",
"about": "Ivan Albertovich Puni"
}
]
}
},
{
"kind": "customsearch#result",
"title": "Palm Springs Aerial Tramway",
"htmlTitle": "Palm Springs Aerial 'u003cb'u003eTramway'u003c/b'u003e",
"link": "http://www.desertsun.com/story/travel/2014/10/07/palm-springs-aerial-tramway/16884547/",
"displayLink": "www.desertsun.com",
"snippet": "Oct 7, 2014 ... Constructed in rugged Chino Canyon on the north edge of Palm Springs, more 'nthan 12 million people have been safely transported by the ...",
"htmlSnippet": "Oct 7, 2014 'u003cb'u003e...'u003c/b'u003e Constructed in rugged Chino Canyon on the north edge of Palm Springs, more 'u003cbr'u003e'nthan 12 million people have been safely transported by the ...",
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"title": "Muralist transforms 'drab' Palm Springs tramway station",
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"description": "While waiting for the next tram car heading down to the valley floor, settle up next to a fire, take a view of the morning sun rising over the Little San Bernardino Mountains.",
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这里有三个问题：
- 您的代码未演示对
datepublished成员的任何尝试访问 - 查看示例响应，我们可以看到它是
datepublished，而不是publisheddate thumbnailurl成员不在metatags，但在newsarticle
我怀疑，如果您只是花更多时间来小心您正在正确访问对象，您的代码确实抢占了各种可能的响应，那么您在这方面的所有问题都将得到解决。