在php中搜索## ... ##中包含的所有字符串

问题描述：

I'm trying to build a program that can read variables from a template and allow the user to edit them. I'm trying to use regex to find instances of user-defined variables in the template, which would look like ##VARIABLENAME##.

I essentially want to grab the VARIABLENAME part into an array item, for each variable that exists in the source string.

I looked around a bit but couldn't find anything, regex syntax is quite a beast to someone who hasn't used it before.

Any help appreciated!

EDIT:

Sample input:

"Hello there ##NAME##, you have ##ORDERSNUM## orders pending".

Expected output:

array[0] = 'NAME'
array[1] = 'ORDERSNUM'

I've so far tried

preg_match("/#(.*)#/", $temphtml, $tempvars)

But this is only returning the first match found, twice.

我正在尝试构建一个程序，可以从模板中读取变量并允许用户编辑它们。我正在尝试使用正则表达式在模板中查找用户定义变量的实例，这看起来像## VARIABLENAME ## code>。 p>

我本质上想要的将 VARIABLENAME code>部分抓取到数组项中，对于源字符串中存在的每个变量。 p>

我环顾四周但找不到任何东西，对于之前没有使用它的人来说，正则表达式语法是一种野兽。 p>


任何帮助表示赞赏！ p> 
 
 
编辑： p> 
  
 
示例输入： p> 
 
 
 “Hello there ## NAME ##，您有## ORDERSNUM ## orders pending”。
  code>   pre> 
 
 预期输出： p> 
 
 
  array [0] ='NAME'
array [1] ='ORDERSNUM'
  code>  
 
 我到目前为止已尝试 p> 
 
 
  preg_match（“/#(.*)#/”，$ temphtml，$ tempvars）\  n  code>  pre> 
 
 但这只返回找到的第一个匹配，两次。 p> 
  div>

答

Just use regular expressions like:

preg_match_all('/##([^#]+)##/', $string, $matches)

see http://php.net/manual/function.preg-match-all.php

答

Well tackle the beast with /##([^#]*)##/

Regex101 Demo

答

Since PHP 5.6, it's possible to do that:

$parts = explode('##', $tpl);
array_pop($parts);
$result = array_values(array_filter($parts, function($v,$k) {
    return ($k&1 && !empty($v));}, ARRAY_FILTER_USE_BOTH));

答

You should use this RegEx:

##(.*?)##

Live Demo on Regex101

The .*? makes the search lazy, so after the first ##, it will search until it finds another ##, then stop.

To only get the data inside `##`

If you look at This Demo on 3v4l, you will see that $matches[1] has an array of the data stored in the 1st Capture Group. Therefore, on the string:

Hello there ##NAME##, you have ##ORDERSNUM## orders pending

NAME is stored in $matches[1][0]
ORDERSNUM is stored in $matches[1][1]

If you use this RegEx:

##([^#]*)##

It will fail on But ##This#Will#Not#Work## will it?, however that is not likely to be a variable name. ;)

答

You could use str_ireplace

class YourTemplateEngine
{

   /**
    * Set you html content which has all the tags inside
    * @param string $content
    */
   public function setContent($content)
   {
       $this->content = $content;
   }

   /**
    * Set your tags and assign values
    * @param string $tag
    * @param sting | int |number $value
    */
   public function setTagValue($tag, $value)
   {
       $this->tags_array[$tag] = $value;
   }

   /**
    * Replace all tags
    */
   private function replace_tags()
   {
       $tags = array();
       $values = array();
       foreach ($this->tags_array as $tag => $val) {
           array_push($tags, '##'.$tag.'##');
           array_push($values, $val);
       }

       return str_ireplace($tags, $values, $this->content);
   }

   /**
    * Replace all tags and get output
    */
   public function render()
   {
       return $this->replace_tags();
   }
}

Then you can just to something like this.

$template = new YourTemplateEngine();
$template->setTagValue('NAME','Your Name');
$template->setTagValue('ORDERSNUM',100);
$template->setContent("Hello there ##NAME##, you have ##ORDERSNUM## orders pending");
print $template->render(); 
// Outputs 
// Hello there Your Name, you have 100 orders pending

在php中搜索## ... ##中包含的所有字符串

To only get the data inside ##

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