Question

I made this code to select one checkbox when I click on a image but this don’t work.

$linkToInterview = 'checkById(document.myform.checkbox,$interview_id)';
?>
<a href="javascript:void(0);" onclick='<?=$linkToInterview?>'><img src="<?=siteConfig::img_dir?>new_photos/video.gif" style="border:0px"/></a>

And Javascript function:

<script type="text/javascript">
function checkByID(chk,id) {
chk[id].checked = true ;
}
</script>

And checkbox code:

<td><input type="checkbox" name="checkbox" value="<?php echo $fet['id']; ?>"

Answer 1

$linkToInterview = 'checkById(document.myform.checkbox,$interview_id)';

will contain literal $interview_id, which means you’re outputting

<a href="..." onclick='checkById(document.myform.checkbox,$interview_id)'>

To contain the content of $interview_id, you should use double quote, add a single quote around it, and use double quote on HTML output:

<?php
$linkToInterview = "checkById(document.myform.checkbox,'$interview_id')";
?>
<a href="..." onclick="<?=$linkToInterview?>;">

This will output (assuming your $interview_id="test"):

<a href="..." onclick="checkById(document.myform.checkbox,'test');">