JavaScript & PHP模仿C#中string.format效果

1、JavaScript

function stringformat() {
var args = Array.prototype.slice.call(arguments);
if (args.length == 0) { return '';}
if (args.length == 1) { return args[0]; }
var str = args.shift();
return str.replace(
/\\?\{([^{}]+)\}/g,
function(match, name) {
if (match.charAt(0) === '\\') {
return match.slice(1);
}
return (args[name] === undefined) ? match : args[name];
}
);
}

// 返回 my name is Rain Man and age is 28
stringformat('my name is {0} and age is {1}', 'Rain Man', 28, 'an');

2、PHP

function string_format() {
$args = func_get_args();
if (count($args) == 0) { return '';}
if (count($args) == 1) { return $args[0]; }
$str = array_shift($args);
$GLOBALS['OBJ'] = $args;
$str = preg_replace_callback(
'/\\\?{([^{}]+)}/',
function ($matches) {
list($matche, $name) = $matches;
if ($matche[0] === '\\') {
return substr($matche, 1);
}
$obj = $GLOBALS['OBJ'];
return isset($obj[$name]) ? $obj[$name] : $matche;
},
$str
);
$GLOBALS['OBJ'] = NULL;
return $str;
}

// my name is Rain Man and age is 28
echo string_format('my name is {0} and age is {1}', 'Rain Man', 28, 'an');