what does it mean when we echo javascript

Question

I am not able to figure out what we really mean when we echo javascript. Does it mean; the function inside script will execute inevitably? I mean, will it execute with out even being called? I've seen long scripts that seem to include a complete page inside an echo statement.

echo "<script type='text/javascript'>
$(function(){
blah blah blah
});
</script>";

Answer 1

It means exactly the same thing as when we echo HTML: that text will be sent to the browser. What the browser does with it is independent of what PHP does.