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ob_start callback function extract output - PHP

开发者 https://www.devze.com 2023-02-17 03:50 出处：网络

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?

相关专题：callback function ob-start php

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> 
<开发者_开发百科;/body> 
</html> 
<?php
    ob_end_flush();
    ?>

$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"