Interesting little snippet.
What is going on here? Livewire gives you the low down.
if($num_rowvs == 0){
echo '<script>// <![CDATA[
alert("This is an alert message. I'm alerting you that you are totally awesome!");
// ]]></script>'; }
First, we’re creating a simple if statement in PHP. Not entirely necessary, but prbobably the most common setup. Next we’re simply echoing the javascript alert – make sure to get your apostrophes and commas straight.
And that is it. Close out the tags and you have successfully called a javascript alert from inside PHP. Congrats.