Question

I have a PHP array with URL’s that I would like to keep hidden (or at least more difficult to copy)
I need to convert this array to a JS array.
Is it possible without writing the items in JS?

So NOT like in following example where the URL’s can be found in the source…

<?php
    $arr = array("http://foo.com","http://bar.com","http://baz.com"); 
?>

<script>
    var newArr = new Array("<?php echo implode(',' ,$arr); ?>");
</script>

Answer 1

If you want to make the urls unreadable you can encode each character to \xnn escape sequence:

<?php
    $arr = array( "http://foo.com","http://bar.com","http://baz.com" ); 
    $encodedArr = array();
    foreach( $arr as $url ) {
        $encodedUrl = '';
        for( $i = 0; $i < strlen( $url ); ++$i ) {
            $encodedUrl .= '\\x'.str_pad( 
                  sprintf( '%x', ord( $url[$i] ) ),
                  2, STR_PAD_LEFT );
        }
        $encodedArr[] = '"'.$encodedUrl.'"';
    }
?>
<script type="text/javascript">
    var newArr = [ <?php echo implode(',' ,$encodedArr); ?> ];
    alert( newArr[0] );
</script>

the written javascript will look like this:

var newArr = [ "\x68\x74\x74\x70\x3a\x2f\x2f\x66\x6f\x6f\x2e\x63\x6f\x6d","\x68\x74\x74\x70\x3a\x2f\x2f\x62\x61\x72\x2e\x63\x6f\x6d","\x68\x74\x74\x70\x3a\x2f\x2f\x62\x61\x7a\x2e\x63\x6f\x6d" ];
alert( newArr[0] );

but will alert http://foo.com