parse the html data to array data in php

问题

I am trying to parse the html format data into arrays using the a tag classes but i was not able to get the desired format . Below is my data

$text ='<div class="result results_links results_links_deep web-result ">
  <div class="links_main links_deep result__body">
    <h2 class="result__title">
      <a rel="nofollow" class="result__a" href="">Text1</a> 
    </h2>
    <a class="result__snippet" href="">Text1</a> 
    <a class="result__url" href="">
    example.com
    </a>
  </div>
</div>

<div class="result results_links results_links_deep web-result ">
  <div class="links_main links_deep result__body">
    <h2 class="result__title">
      <a rel="nofollow" class="result__a" href="">text3</a> 
    </h2>
    <a class="result__snippet" href="">text23</a> 
    <a class="result__url" href="">
    text.com
    </a>
  </div>
</div>';

I am trying to get the result using below code

$lines = explode("\n", $text);
$out = array();
foreach ($lines as $line) {
    $parts = explode(" > ", $line);
    $ref = &$out;
    while (count($parts) > 0) {
        if (isset($ref[$parts[0]]) === false) {
            $ref[$parts[0]] = array();
        }
        $ref = &$ref[$parts[0]];
        array_shift($parts);
    }
}
print_r($out);

But i need the result exactly like below

array:2 [
  0 => array:3 [
    0 => "Text1"
    1 => "Text1"
    2 => "example.com"
  ]
  1 => array:3 [
    0 => "text3"
    1 => "text23"
    2 => "text.com"
  ]
]

Demo : https://eval.in/746170

Even i was trying dom like below in laravel :

$dom = new DOMDocument;
$dom->loadHTML($text);
foreach($dom->getElementsByTagName('a') as $node)
{
    $array[] = $dom->saveHTML($node);
}

print_r($array);

So how can i use the classes to separate the data as i wanted .Any suggestions please.Thank you .

回答1:

I will do it using DOMDocument and DOMXPath to target interesting parts more easily. In order to be more precise, I register a function that checks if a class attribute contains a set of classes:

function hasClasses($attrValue, $requiredClasses) {
    $requiredClasses = explode(' ', $requiredClasses);
    $classes = preg_split('~\s+~', $attrValue, -1, PREG_SPLIT_NO_EMPTY);
    return array_diff($requiredClasses, $classes) ? false : true;
}

$dom = new DOMDocument;
$state = libxml_use_internal_errors(true);
$dom->loadHTML($html);
libxml_use_internal_errors($state);

$xp = new DOMXPath($dom);
$xp->registerNamespace('php', 'http://php.net/xpath');
$xp->registerPhpFunctions('hasClasses');

$mainDivClasses = 'result results_links results_links_deep web-result';
$childDivClasses = 'links_main links_deep result__body';

$divNodeList = $xp->query('//div[php:functionString("hasClasses", @class, "' . $mainDivClasses . '")]
                           /div[php:functionString("hasClasses", @class, "' . $childDivClasses . '")]');

$results = [];
foreach ($divNodeList as $divNode) {
    $results[] = [
        trim($xp->evaluate('string(./h2/a[@class="result__a"])', $divNode)),
        trim($xp->evaluate('string(.//a[@class="result__snippet"])', $divNode)),
        trim($xp->evaluate('string(.//a[@class="result__url"])', $divNode))
    ];
}

print_r($results);

without registering a function, you can also use the XPath function contains in your predicates. It's less precise since it only checks if a substring is in a larger string (and not if a class attribute have a specific class like the hasClasses function) but it must be enough:

$dom = new DOMDocument;
$state = libxml_use_internal_errors(true);
$dom->loadHTML($html);
libxml_use_internal_errors($state);

$xp = new DOMXPath($dom);

$divNodeList = $xp->query('//div[contains(@class, "results_links_deep")]
                                [contains(@class, "web-result")]
                           /div[contains(@class, "links_main")]
                               [contains(@class, "links_deep")]
                               [contains(@class, "result__body")]');

$results = [];
foreach ($divNodeList as $divNode) {
    $results[] = [
        trim($xp->evaluate('string(./h2/a[@class="result__a"])', $divNode)),
        trim($xp->evaluate('string(.//a[@class="result__snippet"])', $divNode)),
        trim($xp->evaluate('string(.//a[@class="result__url"])', $divNode))
    ];
}

print_r($results);

回答2:

Here you go, try this and tell me if you need any more help:

<?php
$test = <<<EOS
<div class="result results_links results_links_deep web-result ">
  <div class="links_main links_deep result__body">
    <h2 class="result__title">
      <a rel="nofollow" class="result__a" href="">Text1</a>
    </h2>
    <a class="result__snippet" href="">Text1</a>
    <a class="result__url" href="">
    example.com
    </a>
  </div>
</div>

<div class="result results_links results_links_deep web-result ">
  <div class="links_main links_deep result__body">
    <h2 class="result__title">
      <a rel="nofollow" class="result__a" href="">text3</a>
    </h2>
    <a class="result__snippet" href="">text23</a>
    <a class="result__url" href="">
    text.com
    </a>
  </div>
</div>
EOS;

$document = new DOMDocument();
$document->loadHTML($test);

// first extract all the divs with the links_deep class
$divs = [];
foreach ($document->getElementsByTagName('div') as $div) {
    $classes = $div->attributes->getNamedItem('class')->nodeValue;
    if (!$classes) continue;

    $classes = explode(' ', $classes);

    if (in_array('links_main', $classes)) {
        $divs[] = $div;
    }
}

// now iterate through them and retrieve all the links in order
$results = [];
foreach ($divs as $div) {
    $temp = [];
    foreach ($div->getElementsByTagName('a') as $link) {
        $temp[] = $link->nodeValue;
    }
    $results[] = $temp;
}

var_dump($results);

Working version - http://sandbox.onlinephpfunctions.com/code/e7ed2615ea32c5b9f0a89e3460da28a2702343f1

来源：https://stackoverflow.com/questions/42555739/parse-the-html-data-to-array-data-in-php

标签

php

arrays

laravel-5.4