What role does familiarity with CMS platforms like WordPress play in troubleshooting PHP code and making necessary changes to a website?

Familiarity with CMS platforms like WordPress is crucial in troubleshooting PHP code and making necessary changes to a website because these platforms have their own specific structure and functions that need to be understood in order to effectively modify code. Knowing how to navigate the CMS environment allows developers to pinpoint issues more efficiently and make targeted changes without breaking the site's functionality.

// Example PHP code snippet to modify a WordPress theme file
// Find and replace a specific text in the header.php file

$filename = get_template_directory() . '/header.php';
$file_contents = file_get_contents($filename);

if (strpos($file_contents, 'Old Text') !== false) {
    $new_contents = str_replace('Old Text', 'New Text', $file_contents);
    file_put_contents($filename, $new_contents);
    echo 'Text replaced successfully!';
} else {
    echo 'Text not found in the file.';
}