警告：fopen无法打开流：HTTP请求失败！ HTTP / 1.1 406在/XAMPP/xamppfiles/htdocs/search.php中不可接受 [英] Warning: fopen failed to open stream: HTTP request failed! HTTP/1.1 406 Not Acceptable in /XAMPP/xamppfiles/htdocs/search.php

问题描述

我正在尝试从pubmed获取搜索结果。

I am trying to fetch search results from pubmed.

$query=(BRCA1[tiab]) OR (Breast cancer 1 gene[tiab])AND (Cancer[tiab])
$esearch = 'http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=$query&retmax=10&usehistory=y';
$handle = fopen($esearch, "r");
$rettype = "abstract"; //retreives abstract of the record, rather than full record
$retmode = "xml";

我收到此HTTP访问失败错误。

I get this HTTP Access Failure error.

错误：

警告：fopen（ http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=(BRCA1 [tiab]）或（乳腺癌1基因[tiab]）AND （Cancer [tiab]）& retmax = 10& usehistory = y）：无法打开流：HTTP请求失败！第60行/Applications/XAMPP/xamppfiles/htdocs/search.php中不能接受HTTP / 1.1 406

Warning: fopen(http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=(BRCA1[tiab]) OR (Breast cancer 1 gene[tiab]) AND (Cancer[tiab])&retmax=10&usehistory=y): failed to open stream: HTTP request failed! HTTP/1.1 406 Not Acceptable in /Applications/XAMPP/xamppfiles/htdocs/search.php on line 60

当我直接粘贴url， http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=(BRCA1[tiab]）或（乳腺癌1基因[tiab]）AND（癌症[tiab]）& retmax = 10& usehistory = y我在页面中获得搜索结果，但在通过php脚本访问时没有。

When I directly paste the url, http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=(BRCA1[tiab]) OR (Breast cancer 1 gene[tiab]) AND (Cancer[tiab])&retmax=10&usehistory=y I get search results in the page but not when accessing through the php script.

推荐答案

这里有一些问题。首先，您在第一行有一个语法错误，其中您有没有引号的纯文本。我们可以通过替换这一行来解决这个问题：

There are a few issues here. First, you have a syntax error on the first line, where you have plain text without quotes. We can fix that by replacing this line:

$query=(BRCA1[tiab]) OR (Breast cancer 1 gene[tiab])AND (Cancer[tiab]) 

这一行：

$query = "(BRCA1[tiab]) OR (Breast cancer 1 gene[tiab])AND (Cancer[tiab])";

现在修复了语法错误。

This now fixes that syntax error.

其次，你的第二行有一个无声字符串连接错误。如果要内联连接变量（不使用。运算符），则必须使用双引号，而不是单引号。让我们通过替换这一行来解决这个问题：

Secondly, you have a silent string concat error in your second line. If you want to concatenate variables inline (without using the . operator) you have to use double quotes, not single quotes. Let's fix that by replacing this line:

$esearch = 'http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=$query&retmax=10&usehistory=y'; 

此行：

$esearch = "http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=$query&retmax=10&usehistory=y"; 

最后，你没有对查询进行urlencoding，因此你的URL中有空格没有编码，并搞乱了fopen的URL。让我们将查询字符串包装在 urlencode（）中：

Lastly, you're not urlencoding the query, thus you're getting spaces in your URL that are not encoded and are messing up the URL for fopen. Let's wrap the query string in urlencode():

$query = urlencode("(BRCA1[tiab]) OR (Breast cancer 1 gene[tiab])AND (Cancer[tiab])");
$esearch = "http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=$query&retmax=10&usehistory=y"; 
$handle = fopen($esearch, "r"); 
$rettype = "abstract"; //retreives abstract of the record, rather than full record 
$retmode = "xml"; 

我在CLI上测试了这段代码，它似乎工作正常。

I tested this code on CLI and it seems to work correctly.

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