使用PHP使用ID替换HTML标记内的重复内容中的某些内容

Question

I'm working on code that replaces strings in "index.html" file and there is a repeated string inside HTML tags l. I'm using PHP to replace string with another one

The problem is that string may be repeated in many tags so how to make PHP code change string inside tags with certain id, because this PHP code replace all strings inside file

$(document).ready(function () {
    $("p").click(function () {
        var mid= this.id;
        var yyy = document.getElementById(mid).innerHTML;
        document.getElementById("oldvalue").value = yyy;
        document.getElementById("iddddd").value=mid;
         document.getElementById("newvalue").value ="text2"
    });
});

<p id="parg1" >text1 </p>
<p id="parg2">text1 </p>
<form action="changeText.php" method="POST" >
  <input type="hidden" id="oldvalue" name="oldvalue" class="inputText">
  <input type="hidden" id="newvalue" name="newvalue"  class="inputText" >
    <input type="hidden" id="iddddd" name="id"  class="inputText">

  <input type="submit" id="submitbutton" value="Save" >
</form>

//php code

$content=file_get_contents("index.html");
$content_chunks=explode($_POST['oldvalue'], $content);
$content=implode($_POST['newvalue'], $content_chunks);
file_put_contents("index.html", $content);
//result from that is
//<p id="parg1" >text2 </p>
//<p id="parg2">text2 </p>

</div>

Answer 1

You need to use DOMDocument for this you can read more about it at the php docs.

here's a simple example :

<?php 
function replaceByID(String $html,String $id,String $search,String $replace) : String 
{
$dom = new \DOMDocument();
$dom->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));

$element = $dom->getElementByID($id);
$element->nodeValue = str_replace($search,$replace,$element->nodeValue);

$html = $dom->saveHTML();
return $html;
}



$file = 'index.html';
$html = file_get_contents($file);
$oldText = htmlspecialchars($_POST['oldValue']);
$newText = htmlspecialchars($_POST['newValue']);
$html = replaceByID($html,'parg1',$oldText,$newText);

EDIT :

I just tested this function and it works perfectly , i guess it can get the job done for you.

If you are working on a project where you need to manipulate or edit HTML files i highly recommend you learn about DOM and PHP DOM .