正则表达式替换两个字符之间的单词

Question

I'm trying to replace characters between two string/s with below code:

<tr <?php echo "class = 'link_id_$row->link_id key_id_$row->key_id'";?>>
<td>
<?php echo form_input('target_keyword', $row->key_name, 
  "class = 'link_id_$row->link_id key_id_$row->key_id validate[required] edit_keyword' id='target_links_$row->key_id'");
?>
<?php echo form_hidden('client_id', $client_id);?>
</td>
<td>
<?php echo form_dropdown('target_links', $links_data, $row->link_id,
  'class="target_urls validate[required]" id="target_links_$row->key_id"');
?>
</td>
<td class="center">
<?php echo "<input type='hidden' value='$row->key_id' class='key_id'/>"; ?>
<?php echo "<input type='hidden' value='$row->link_id' class='link_id'/>"; ?>
<?php echo form_submit('edit_keyword', '', 'id="edit_keyword" class="edit"');?>
<?php echo form_submit('delete_keyword', '', 'id="delete_keyword" class="delete"');?>
</td>
</tr>

Is there a way we can replace anything in between "row" and "'" ?

Answer 1

This is the problem with single quote (') and double quote (") using wrong way. First you understand the difference of these and use in proper manner.

Please try the below code

$obj_1 = "$row->link_id";
$obj_2 = "$row->key_id";
$class_1 = "link_id_$obj_1";
$class_2 = "key_id_$obj_2";

<tr <?php echo "class = $class_1 $class_2";?>>