解析tei domxpath获取评估循环内的文本子标记
[英]parse tei domxpath get text child tag inside evaluate loop
问题描述
From a string that contain a tei file, I generate an index to navigate to their blocks, I retrieve all the div tags, I also want to get, if present, the content of a tag (the tag <head> ) inside current div. 
从包含tei文件的字符串中，我生成一个索引以导航到它们的块，检索所有div标签，我还想获取当前div中标签的内容（标签<head> ）（如果存在） 。
Example tei file: tei文件示例：
<div type="lib" n="1"><head>LIBER I</head>...
<div type="pr">...</div>
<div type="cap" n="1"><head>CAP EX</head><p><milestone unit="par" n="1" />...<milestone unit="par" n="2" />...</div>
<div type="cap" n="2"><head>CAP EX</head><milestone unit="par" n="1" />...<milestone unit="par" n="2" />...</div>
</div>
I tried this but don't work: 我尝试了这个，但是不起作用：
//source file:
$fulltext = '<div type="lib" n="1"><head>LIBER I</head>...<div type="pr">...</div><div type="cap" n="1"><head>CAP EX</head><p><milestone unit="par" n="1" />...<milestone unit="par" n="2" />...</div><div type="cap" n="2"><head>CAP EX</head><milestone unit="par" n="1" />...<milestone unit="par" n="2" />...</div></div>';
$dom = new DOMDocument();
@$dom->loadHTML($fulltext);
$domx = new DOMXPath($dom);
$entries = $domx->evaluate("//div");
echo '<ul>';
foreach ($entries as $entry){
$title = '';
type = $entry->getAttribute( 'type' );
$n = $entry->getAttribute( 'n' );
$head = $domx->evaluate("string(./head[1])",$entry);
if( $head != '' ) $title = $head; else $title = $n;
echo '<li><a href="#'.$type.'-'.$n.'">'.$title.'</li>';
}
echo '</ul>';
The line don't work: 该行不起作用：
$head = $domx->evaluate("string(./head[1])",$entry);
Error returned: 返回错误：
DOMDocument::loadHTML(): htmlParseStartTag: misplaced <head> tag in Entity, line: 3
The purpose of this line is to get the text of the child tag head inside the loop (in this example "LIBER I") 该行的目的是在循环内获取子标签头的文本（在此示例中为“ LIBER I”）
2 个解决方案
解决方案1
0 2017-07-31 09:11:11
Using the @ symbol on the load can hide all sorts of issues. 在负载上使用@符号可以隐藏各种问题。 So if you take it out you get errors with your document. 因此，如果将其取出，则文档会出错。
If however you change the line to 但是，如果您将行更改为
$dom->loadXML($fulltext);
The output gives you what your after. 输出将为您提供服务。
解决方案2
0 已采纳 2017-08-04 09:32:58
Resolved using XMLReader: 使用XMLReader解决：
$level = 0;
$indici_bc = array();
$indici_head = array();
$passed_milestone = false;
$xml = new XMLReader();
$xml->open($pathTei);
//$xml->xml($testo);
while ($xml->read()){
if($xml->nodeType == XMLReader::END_ELEMENT && $xml->name == 'div'){
$level--;
$last_blocco = $xml->name;
if($passed_milestone){ $level--; $passed_milestone = false; }
}
if($xml->nodeType == XMLReader::ELEMENT && ($xml->name == 'div' || $xml->name == 'milestone' )){
$blocco = $xml->name;
$type = $xml->getAttribute('type');
$n = $xml->getAttribute('n');
$unit = isset($xml->getAttribute('unit')) ? $xml->getAttribute('unit') : '';
//here I get the child node
$node = new SimpleXMLElement($xml->readOuterXML());
$head = $node->head ? (string)$node->head : '';
$indici_head[] = $head;
if($last_blocco != 'milestone') $level++;
if($blocco == 'div') $bc[$level] = $n; else $bc[($level+1)] = $n;
$bc_str = '';
for($j=1;$j<$level;$j++){
if( $bc_str != '' ) $bc_str.='.';
$bc_str.=$bc[$j];
}
if( $bc_str != '' ) $bc_str.='.';
$bc_str.=$n;
$last_blocco = $xml->name;
if( $blocco == 'milestone' ) $passed_milestone = true;
$indici_bc[]=$bc_str;
}
}
$xml->close();
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