一段极好的js代码如何改写成php?
hsfzxjy的这个“17 行代码实现的简易 Javascript 字符串模板”在前端很有用,想请教各位大大php版本的应该怎么改写。
<code>function render(template, context) { var tokenReg = /(\\)?\{([^\{\}\\]+)(\\)?\}/g; return template.replace(tokenReg, function (word, slash1, token, slash2) { if (slash1 || slash2) { return word.replace('\\', ''); } var variables = token.replace(/\s/g, '').split('.'); var currentObject = context; var i, length, variable; for (i = 0, length = variables.length; i </code>
将函数挂到 String 的原型链
<code>String.prototype.render = function (context) { return render(this, context); };</code>
之后,我们便可以这样调用啦:
<code>"{greeting}! My name is { author.name }.".render({ greeting: "Hi", author: { name: "hsfzxjy" } }); // Hi! My name is hsfzxjy.</code>
回复内容:
hsfzxjy的这个“17 行代码实现的简易 Javascript 字符串模板”在前端很有用,想请教各位大大php版本的应该怎么改写。
<code>function render(template, context) { var tokenReg = /(\\)?\{([^\{\}\\]+)(\\)?\}/g; return template.replace(tokenReg, function (word, slash1, token, slash2) { if (slash1 || slash2) { return word.replace('\\', ''); } var variables = token.replace(/\s/g, '').split('.'); var currentObject = context; var i, length, variable; for (i = 0, length = variables.length; i </code>
将函数挂到 String 的原型链
<code>String.prototype.render = function (context) { return render(this, context); };</code>
之后,我们便可以这样调用啦:
<code>"{greeting}! My name is { author.name }.".render({ greeting: "Hi", author: { name: "hsfzxjy" } }); // Hi! My name is hsfzxjy.</code>
补充一下,内置函数 strtr 做的事情几乎一摸一样,出了没有支持点语法访问多层之外
<?php echo strtr("{greeting}! My name is {author.name}.", array( '{greeting}' => 'Hi', '{author.name}' => 'hsfzxjy', ));
另外,javascript中修改内置对象的原型链是绝对不能做的事情
只是一段简单的字符串替换,用php的话写大概12行,如下:
function render($template, $arr) { $reg = "/(\\\)?\{([^\{\}\\\]+)(\\\)?\}/s"; return preg_replace_callback($reg, function ($m) use ($arr) { if (!empty($m[1])||!empty($m[3])||empty($m[2])) return str_replace("\\", '', $m[0]); $variables = explode('.', preg_replace("/\s/", '', $m[2])); foreach ($variables as $variable) { $arr = isset($arr[$variable])?$arr[$variable]:null; if (!$arr) return ''; } return $arr; }, $template); }
使用也是相同的
<code>$data = array( "greeting"=> "Hi", "author"=>array("name"=>"hsfzxjy")); echo render("{greeting}! My name is { author.name }.",$data); // Hi! My name is hsfzxjy.</code>
在php这边貌似没用,如果需要的话搜索一下就行了。通常php只要写成 "{$greeting}! My name is {$author['name']}就行了,还解析一次干什么。smarty之类的模板也内置了这种解析,为什么还要再搞一次?

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