PHP将字符串替换为具有reg exp的HTML实体 - PHP replace string with an HTML entity with reg exp

PHP replace string with an HTML entity with reg exp

我是使用regexp的新手，所以我想知道：如何制作一个区分大小写的正则表达式来匹配和替换php中的以下内容：

#ampersand# => &#38;
#space# => &#160;
#through# => &#247;

其他一切都像：

# ampersand#, #ampersand #, # ampersand #
# space#, #space #, # space #
# through#, #through #, # through #

应忽略。

感谢您的帮助！

这样的函数怎么样？

function convertToEntity($string) {
  $search = array("#ampersand#", "#space#", "#through#");
  $replace = array("&#38;", "&#160;", "&#247;");
  $newstring = str_replace($search, $replace, $string);
  return $newstring;
}

<?php
$source = '#ampersand #,# space#, # through #';
$result = preg_replace(array('/#'s*ampersand's*#/i','/#'s*space's*#/i','/#'s*through's*#/i'),array('&#38;','&#160;','&#247;'),$source);
echo $result;

结果：

&#38;,&#160;, &#247;