What is the difference between server-side and client-side code in relation to PHP?

Server-side code is executed on the server before the page is sent to the client's browser, while client-side code is executed on the client's browser. In PHP, server-side code is written within <?php ?> tags and is used to perform tasks such as querying a database or processing form data. Client-side code, on the other hand, is typically written in languages like JavaScript and is used to manipulate the content of a webpage after it has been loaded. 

&lt;?php
// Server-side code example
$servername = &quot;localhost&quot;;
$username = &quot;username&quot;;
$password = &quot;password&quot;;
$dbname = &quot;myDB&quot;;

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn-&gt;connect_error) {
    die(&quot;Connection failed: &quot; . $conn-&gt;connect_error);
}
echo &quot;Connected successfully&quot;;
?&gt;

Keywords

server-side code client-side code PHP backend development frontend development

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