喲耶得到解決,我聽說你喜歡的樹枝,所以我寫了一個正則表達式小號Ø當你分析,你可以解析:
正則表達式
\{\{(?!%)\s* # Starts with {{ not followed by % followed by 0 or more spaces
((?:(?!\.)[^\s])*) # Match anything without a point or space in it
\s*(?<!%)\}\} # Ends with 0 or more spaces not followed by % ending with }}
| # Or
\{%\s* # Starts with {% followed by 0 or more spaces
(?:\s(?!endfor)(\w+))+ # Match the last word which can not be endfor
\s*%\} # Ends with 0 or more spaces followed by %}
# Flags: i: case insensitive matching | x: Turn on free-spacing mode to ignore whitespace between regex tokens, and allow # comments.
PHP
$string = '<!DOCTYPE html>
<html>
<head>
<title>My Webpage</title>
</head>
<body>
<ul id="navigation">
{% for item in navigation %}
<li><a href="{{ item.href }}">{{ item.caption }}</a></li>
{% endfor %}
</ul>
<h1>My Webpage</h1>
{{ a_variable }}
</body>
</html>';
preg_match_all('/\{\{(?!%)\s*((?:(?!\.)[^\s])*)\s*(?<!%)\}\}|\{%\s*(?:\s(?!endfor)(\w+))+\s*%\}/i', $string, $m);
$m = array_map('array_filter', $m); // Remove empty values
array_shift($m); // Remove first index [0]
print_r($m); // Print results
Regex online demoPHP online demo
注意:這僅僅是一個POC,並且從未想過要在生產中使用。
爲什麼'item'不是變量? – HamZa
@HamZaDzCyberDeV它在模板內部使用,但它不是模板的參數。調用'render($ op_template)'的人不關心'item'。 – delnan
@delnan這個問題被標記爲'regex',正則表達式無法找到/檢測這樣的事情,因此從邏輯上講,如果你想考慮這些細節,你不能編寫通用的東西。說到Twig本身,它似乎[不可能](http://stackoverflow.com/q/12799094/),所以我們可能必須用正則表達式來完成,但我們需要指定「規則」來比賽。 – HamZa