li id="result_0" data-hoge="4592105095" class="s-result-item"
4592105095
I want answer like this
Thank you for your cooperation.
Since there was no language specification, we will respond using JavaScript (the expressions in other languages are different, which is the same way of thinking).
var regexp=newRegExp('data-hoge="(.*?)");
var result=regexp.exec('li id="result_0" data-hoge="4592105095" class="s-result-item");
alert(result[1]);
Use ( ) to retrieve the matching value.The values enclosed by ( ) are the number of ( ) and the result array is entered from 1 to 1.This time, there is only one, so it is in index 1.
You must also use the shortest regular expression match.That's why I'm adding the ? of (.*?).Without ?, the result is 4592105095" class="s-result-item.This is because it matches up to the last ""."""Use ? to match the expression as soon as possible.
Is it a replacement using regular expressions?
Search string data-hoge="(.*?)"
Replace string$1
But if you simply want to hit a number, it's like (?<=data-hoge=").*?(?=").
How to use DOM in PHP
<?php
$src='liid="result_0" data-hoge="4592105095" class="s-result-item";
$dom = new DOMDocument();
$dom->loadHTML("<html><body><".$src."/>/body></html>");#Not strict w
$answer=$dom->getElementById('result_0')->getAttribute('data-hoge');
echo$answer;
?>
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