how to hide .php in url

Options +MultiViews
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^\.]+)$ $1.php [NC,L]

function strip_param_from_url( $url, $param ) {
    $base_url = strtok($url, '?');              // Get the base url
    $parsed_url = parse_url($url);              // Parse it 
    $query = $parsed_url['query'];              // Get the query string
    parse_str( $query, $parameters );           // Convert Parameters into array
    unset( $parameters[$param] );               // Delete the one you want
    $new_query = http_build_query($parameters); // Rebuilt query string
    return $base_url.'?'.$new_query;            // Finally url is ready
}
// Usage
echo strip_param_from_url( 'http://url.com/search/?location=london&page_number=1', 
	'location' )

//Add this you .htaccess
Options +FollowSymlinks


RewriteEngine On


RewriteBase /

RewriteCond %{REQUEST_FILENAME} !-f


RewriteCond %{REQUEST_FILENAME} !-d

RewriteCond %{REQUEST_FILENAME}.php -f

RewriteRule ^(.+)$ /$1.php [L,QSA]