alert php variable code example

Example 1: alert in php

echo '<script>alert("Message")</script>';

Example 2: alert a php variable

echo '<script type="text/javascript">alert("'.$error.'");</script>';

Example 3: alert in php

// This is in the PHP file and sends a Javascript alert to the client
$message = "Something";
echo "<script type='text/javascript'>alert('$message');</script>";