get_cli_args( string $param, bool $required = false )

function get_cli_args( $param, $required = false ) {
	$args = $_SERVER['argv'];

	$out = array();

	$last_arg = null;
	$return = null;

	$il = sizeof( $args );

	for ( $i = 1, $il; $i < $il; $i++ ) {
		if ( (bool) preg_match( "/^--(.+)/", $args[$i], $match ) ) {
			$parts = explode( "=", $match[1] );
			$key = preg_replace( "/[^a-z0-9]+/", "", $parts[0] );

			if ( isset( $parts[1] ) ) {
				$out[$key] = $parts[1];
			} else {
				$out[$key] = true;
			}

			$last_arg = $key;
		} elseif ( (bool) preg_match( "/^-([a-zA-Z0-9]+)/", $args[$i], $match ) ) {
			for ( $j = 0, $jl = strlen( $match[1] ); $j < $jl; $j++ ) {
				$key         = $match[1][ $j ];
				$out[ $key ] = true;
			}

			$last_arg = $key;
		} elseif ( $last_arg !== null ) {
			$out[$last_arg] = $args[$i];
		}
	}

	// Check array for specified param
	if ( isset( $out[$param] ) ) {
		// Set return value
		$return = $out[$param];
	}

	// Check for missing required param
	if ( !isset( $out[$param] ) && $required ) {
		// Display message and exit
		echo "\"$param\" parameter is required but was not specified\n";
		exit();
	}

	return $return;
}