Question

我有字符串some-other/other/ram/1gb/2gb/other，并想要解析必须捕获可重复参数的ram组。（它用于网址过滤ram/1gb/2gb/4gb，表示组ram和捕获的值数组（1gb，2gb，4gb））

我必须在正则表达式中更改以捕获一个参数组下的参数数组？现在我有：

$str = "some-other/other/ram/1gb/2gb/other";
$possible_values = implode('|', array('1gb','2gb','4gb','8gb','12gb','16gb','32gb'))
$compiled = "#(.*)ram/(?P<ram>{$possible_values})(.*)$#uD";

if(preg_match($compiled,$str,$matches){
var_dump($matches['ram'])
//output is string '1gb', but I want to see array('1gb', '2gb')
}

我必须改变什么？谢谢！

Answer 1

尝试：

$compiled = "#^(.*)ram/(?P<ram>(?:{$possible_values}/?)+)(/(?:.*))$#uD";

内部组匹配可能值的任何序列，分隔为/。

preg_match不会为重复运算符返回数组。使用explode('/', $matches['ram'])将其拆分。

Answer 2

我想这可能比你想象的要容易，这是我的5美分：

$(document).ready(function() { 
    // when you keep DOM elements in variables is better to put $ in the beginning
    var $module = $(".divCreate");

    // faster than .find()
    var $list = $(".listTag", $module);

    // can not call 'on' with variable
    //var $button = $(".divButton", $module);

    // called through document since we need to handle dynamic added elements - check event delegation
    $(document).on("click", ".divButton", function() {
            $list.append("<div class='tag'>Tag</div>");

            setTimeout(function() {
                // some improvments
                $(".tag", $list).last().addClass("tag-show");
            }, 40);

            // Just keep this if you have divButton attached to an anchor element
            // Useful for preventing default behvaiour - in this case adding "#" to url
            return false;
    });

    // Do not need to create the event inside that event
    $(document).on("click", ".tag-show", function() {
        // Since we use an element more than once is better to
        // add it into a variable to avoid performance issues - js caches it and call the variable
        var $el = $(this); // our needed 'this'
        $el.removeClass("tag-show");

        setTimeout(function() {
            // 'this' here returns some properties of window (where setTimeout belongs), we need to call element cached above 
            //(the 'this' above contains what we need) 
            $el.remove();
        }, 190);
    }); 
});

<强>输出：

$ram = "some-other/other/ram/1gb/2gb/other";
if (preg_match('%/ram/%i', $ram)) {
    preg_match_all('/(\d+gb)/i', $ram, $matches, PREG_PATTERN_ORDER);
}
 var_dump($matches[1]);

<强>样本：

http://ideone.com/jMoobu

正则表达组。在一个组中提取少量参数

2 个答案: