php - 如何: compare array with string and create hastags before tweeting

Question

假设我有以下数组(这是数据库查询的返回值):

Array ( [0] => PHP [1] => Webdesign [2] => Wordpress [3] => Drupal [4])

以及以下字符串:

Working With Wordpress Shortcodes

如何将数组与字符串进行比较，以查看字符串是否包含存储在数组中的任何单词？ (希望这对你有意义 :d )

当他找到匹配项(例如:Wordpress)时，它应该创建一个标签，如下所示:

Working With #Wordpress Shortcodes

Answer 1

使用preg_replace:

$tags = array('PHP', 'Webdesign', 'Wordpress', 'Drupal', 'SQL');
$text = 'Working With Wordpress Shortcodes and doing some NoSQL and SQL';

$regex = '/\b('.implode('|', array_map('preg_quote', $tags)).')\b/i';
$result = preg_replace($regex, '#$1', $text);

会输出:

Working With #Wordpress Shortcodes and doing some NoSQL and #SQL

实例:

http://codepad.org/SxchtXmI