If condition in mixed html and php code [duplicate]

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• if block inside echo statement? 4 answers

I mixed html and php but it doesn't work because of if condition. How make my if condition work in this code below?

PHP code

echo "<tr>
          <td>" . $linie['Text'] . "</td>
          <td><input type='radio' name='check".$i."' value='0' <? if($result1>0){ echo 'checked';} ?> onClick='disactive(".$i.")'></td>";