Question

When I write:

alert(<?php echo "33333";?>);

it works.

If I echo a number, it works too. But if I write

alert(<?php echo "346346gj";?>);

it doesn’t work.

Can someone tell me why?

Answer 1

alert(<?php echo "33333";?>); will output alert(33333);. And it’s a correct javascript syntax.

alert(<?php echo "346346gj";?>); will output alert(346346gj);. It’s not a correct syntax.

When you want to alert a string in javascript you write alert("346346gj"); or alert('346346gj');

So you must replace alert(<?php echo "346346gj";?>); with one of the following:

• alert('<?php echo "346346gj";?>');
• alert("<?php echo "346346gj";?>");
• alert('<?php echo '346346gj';?>');
• alert("<?php echo '346346gj';?>");
• alert(<?php echo "'346346gj'";?>');
• alert(<?php echo '"346346gj"';?>');

And there are still different conbinations.