Question

I am writing some JavaScript code that uses a string rendered with PHP. How can I escape single quotes (and only single quotes) in my PHP string?

<script type="text/javascript">
    $('#myElement').html('say hello to <?php echo $mystringWithSingleQuotes ?>');
</script>

Answer 1

Quite simply: echo str_replace('\'', '\\\'', $myString);
However, I’d suggest use of JSON and json_encode() function as it will be more reliable (quotes new lines for instance):

<?php $data = array('myString' => '...'); ?>

<script>
   var phpData = <?php echo json_encode($data) ?>;
   alert(phpData.myString);
</script>