ob_start 回调函数提取输出 - PHP

发布于 2024-10-22 03:27:03 字数 477 浏览 1 评论 0原文

我想获得输出“Apples”，因为它位于 span 标签内部，其 id 称为“fruit”。那么回调函数中应该写什么代码呢？

 <?php
    function callback($buffer) {  
      // get the fruit inHTML text, the output should be "Apples" only   
        ....
        ....
    }
    ob_start("callback");
    ?> 
   <html>
<body>
 <p>It's like comparing <span id="fruit">Apples</span> to Oranges.</p> 
</body> 
</html> 
<?php
    ob_end_flush();
    ?>

原文

I would like to get output "Apples", because it is inside of span tag which has id called fruit. So what codes should be written in that callback function?

 <?php
    function callback($buffer) {  
      // get the fruit inHTML text, the output should be "Apples" only   
        ....
        ....
    }
    ob_start("callback");
    ?> 
   <html>
<body>
 <p>It's like comparing <span id="fruit">Apples</span> to Oranges.</p> 
</body> 
</html> 
<?php
    ob_end_flush();
    ?>

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像你 2024-10-29 03:27:03

$dom = new DOMDocument;

$dom->loadHTML($buffer);

$xpath = new DOMXPath($dom);

$node = $xpath->query('//span[@id="fruit"]');

var_dump($node->item(0)->nodeValue); // string(6) "Apples"

更通用的解决方案...

$dom = new DOMDocument;

$dom->loadHTML($buffer);

$text = $dom->getElementsByTagName('p')->item(0)->getElementsByTagName('span')->item(0)->nodeValue;

var_dump($text); // string(6) "Apples"

$dom = new DOMDocument;

$dom->loadHTML($buffer);

$xpath = new DOMXPath($dom);

$node = $xpath->query('//span[@id="fruit"]');

var_dump($node->item(0)->nodeValue); // string(6) "Apples"

A more generic solution...

$dom = new DOMDocument;

$dom->loadHTML($buffer);

$text = $dom->getElementsByTagName('p')->item(0)->getElementsByTagName('span')->item(0)->nodeValue;

var_dump($text); // string(6) "Apples"

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