问题描述
我在preg_replace()中使用正则表达式，以便在一段文本中查找和替换一个句子. $search_string包含纯文本+ html标记+ 元素.问题在于，只有 元素有时会在运行时转换为空白，这使得使用str_replace()进行查找和替换变得困难.因此，我正在尝试构建一个与搜索字符串相同的模式，并将匹配包含或不包含 元素的任何类似内容；
I am using regular expressions with preg_replace() in order to find and replace a sentence in a piece of text. The $search_string contains plain text + html tags + elements. The problem is that only sometimes the elements convert to white space on run time, making it difficult to find and replace using str_replace(). So, I'm trying to build a pattern that is equal to the search string and will match anything like it which contains, or does not contain the elements;
例如:
$search_string = 'Two years in, the company has expanded to 35 cities, five of which are outside the U.S. Plus, in April, <a href="site.com">ClassPass</a> acquired its main competitor, Fitmob.';
$pattern = $search_string(但忽略主题中的 元素)
$pattern = $search_string(BUT IGNORE THE elements in the subject)
$subject = "text text text text text". $search_string . "text text text text text";
使用正则表达式来排除单词/字符串，我尝试过:
$pattern = '`^/(?!\ )'.$search_string.'`';
$output = preg_replace($pattern, $replacement_string,$subject);
最终结果将是，如果$ subject确实包含一个类似于我的$seach_string但没有 元素的字符串，它将仍然匹配并替换为$replacement_string
The end result will be that if the $subject does contains a string that is like my $seach_string but without the elements, it will still match and replace it with $replacement_string
实际值:
$subject = file_get_contents("http://venturebeat.com/2015/11/10/sources-classpass-raises-30-million-from-google-ventures-and-others/");
$search_string = "Two years in, the company has expanded to 35 cities, five of which are outside the U.S. Plus, in April, ClassPass acquired its main competitor, Fitmob.";
$replacement_string = "<span class='smth'>Two years in, the company has expanded to 35 cities, five of which are outside the U.S. Plus, in April, ClassPass acquired its main competitor, Fitmob.</span>";
推荐答案
这不是一种非常有效的方法，但它应该为您锻炼，
Not a very efficient way of doing it but it should workout for you,
preg_replace('Two.*?years.*?in.*?the.*?company.*?has.*?expanded.*?to.*?35.*?cities.*?five.*?of.*?which.*?are.*?outside.*?the.*?U\.S\..*?Plus.*?in.*?April.*?ClassPass.*?acquired.*?its.*?main.*?competitor.*?Fitmob\.', '<span class=\'smth\'>$0</span>', $subject);
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