What steps can be taken to define the variable $page in PHP to avoid the Notice: Undefined variable error?

When the $page variable is used without being defined in PHP, it will result in a "Notice: Undefined variable" error. To avoid this error, you can define the variable before using it by checking if it is set using the isset() function. This will prevent the error from occurring. 

// Check if $page is set, if not, define it
if (!isset($page)) {
    $page = ''; // Define $page as an empty string
}

// Now you can safely use $page without causing an error
echo $page;

Keywords

variable PHP define error notice

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