为什么simple_html_dom找到（'tr'）[0]得到表格行2而不是表格行1？

why does find('tr')[0]; get table row 2 instead of table row 1 ?

This is my html all tables have the same class and layout.

<table class="tablemenu">
   <tbody>
        <tr>
          <td><b>hello</b></td>
          <td><b>hi</b></td>  
        </tr>
        <tr>
          <td>hey</td>
          <td>Alright</td>
          <td>Good</td>
          <td>Good</td>
          <td><a>Date</a></td>  
        </tr>
   </tbody>
</table>

<table class="tablemenu">
   <tbody>
        <tr>
          <td><b>hello</b></td>
          <td><b>hi</b></td>  
        </tr>
        <tr>
          <td>hey</td>
          <td>Alright</td>
          <td>Good</td>
          <td>Good</td>
          <td><a>Date</a></td>  
        </tr>
   </tbody>
</table>

<table class="tablemenu">
   <tbody>
        <tr>
          <td><b>hello</b></td>
          <td><a>hi</a></td>  
        </tr>
        <tr>
          <td>hey</td>
          <td>Alright</td>
          <td>Good</td>
          <td>Good</td>
          <td><a>LINK</a></td>  
        </tr>
   </tbody>
</table>

This is my php

<?php

include("simpleHtmlDom/simple_html_dom.php");

$html = new simple_html_dom();

// Load a file 
$html->load_file('http://mySite.net/');

foreach($html->find('table[class=tablemenu]') as $element){

 $Link = $element->find('tr')[0]->find('td')[4]->find('a')[0];        

  echo($Link->text());             
  echo '<br />'; 

}

?>

At first to get the word 'Date' i tried

$Link = $element->find('tr')[1]->find('td')[4]->find('a')[0]; 

But that didn't work, it said undefined index.

Then i tried this just messing around and it works

$Link = $element->find('tr')[0]->find('td')[4]->find('a')[0];

This gets the word Date for some reason. I don't understand why, i do need that but although it works - i now can't access table row 1. to grab the word say "hi".

I see two one issues:

Your first <tr> only has 2 <td>s, so $element->find('tr')[0]->find('td')[4] should throw an exception.

Edit OP fixed pasted code.

Fix your markup. You're not properly closing your <tr> elements:

<table class="tablemenu">
   <tbody>
        <tr>
          <td><b>hello</b></td>
          <td><b>hi</b></td>  
        </tr> <!-- close this! --->
        <tr>
          <td>hey</td>
          <td>Alright</td>
          <td>Good</td>
          <td><a>Date</a></td>  
        </tr> <!-- close this! --->
   </tbody>
</table>

There is wrong indexing because you are not closing the tr tags properly

the link should be on first index instead of zeroth index

$Link = $element->find('tr')[1]->find('td')[4]->find('a')[0];   

To print hi try

echo $element->find('tr')[0]->find('td')[1]->find('b')[0]->text();   

Full code

foreach($html->find('table[class=tablemenu]') as $element){
   $Link = $element->find('tr')[1]->find('td')[4]->find('a')[0];        
   echo($Link->text());             
   echo '<br />'; 
   echo $element->find('tr')[0]->find('td')[1]->find('b')[0]->text();  
}

If the above not works then find tr in tbody like

$Link = $element->find('tbody')->find('tr')[1]->find('td')[4]->find('a')[0];

Also for debugging, try this

foreach($html->find('table[class=tablemenu]') as $element){
   echo '<pre>';
   var_dump($element);// find the object here
   echo '</pre>';
}