为什么我无法在PHP中的foreach循环中设置变量？

I'm trying to set variables inside a foreach() statement, but it keeps dying.

If I do this, all is fine.

foreach($array as $key => $value)
    {
         echo '<tr>';
            echo '<td><a href="http://mgoode.com/index.php?option=com_mls&view=mls&mlsnum=' . $value['1'] . '">' . $value['1'] . '</a></td>';
         echo '</tr>';
    }

But when I do this, it doesn't want to work.

foreach($array as $key => $value)
    {
        $mls = echo '' . $value['1'] . '';
         echo '<tr>';
            echo '<td><a href="http://mgoode.com/index.php?option=com_mls&view=mls&mlsnum=' $mls '">' $mls '</a></td>';
         echo '</tr>';
    }

Syntax wise, I don't see how there's a difference in these statements. I've also tried $mls = $value['1']; and that didn't want to work either.

Surely you got a syntax error complaining about the second case, right? If you say "it keeps dying", you should tell us exactly what happens when something dies. Even more, you should read the syntax error and consider what it says. The errors are descriptive so that you can figure out what's wrong.

In the second case, you aren't concatenating the strings with the . operator.

echo '<td><a href="http://mgoode.com/index.php?option=com_mls&view=mls&mlsnum=' $mls '">' $mls '</a></td>';

should be

echo '<td><a href="http://mgoode.com/index.php?option=com_mls&view=mls&mlsnum=' . $mls . '">' . $mls . '</a></td>';

 $mls = echo '' . $value['1'] . '';

should be

$mls =   $value['1'] ;
echo $mls;

and

  echo '<td><a href="http://mgoode.com/index.php?option=com_mls&view=mls&mlsnum=' $mls '">' $mls '</a></td>'

should be

echo '<td><a href="http://mgoode.com/index.php?option=com_mls&view=mls&mlsnum=' . $mls . '">' . $mls . '</a></td>';

Your second code block should look more like this:

foreach($array as $key => $value)
{
    $mls = (string) $value['1'];
    echo '<tr>';
    echo '<td><a href="http://mgoode.com/index.php?option=com_mls&amp;view=mls&mlsnumamp;=' , $mls , '">'  , $mls , '</a></td>';
    echo '</tr>';
}

• When you type $var = echo "something" you aren't assigning any values to that variable. Instead you are outputting that string - echo has no return value.
• You can typecast your variable into a string without appending and prepending empty strings.
• You can use the , to echo multiple strings one after another with a little less overhead.
• You should be using HTML entities for your ampersands, even though they are in an attribute's value
• (Finally) You aren't actually concatenating your variable into the third echo.