php的字符串用法小结

1 求长度，最基本的

　　$text = "sunny day";

　　$count = strlen($text); // $count = 9

　　2 字符串截取

　　截取前多少个字符

　　$article = "BREAKING NEWS: In ultimate irony, man bites dog."; $summary = substr_replace($article, "...", 40);

　　3 算单词数

　　$article = "BREAKING NEWS: In ultimate irony, man bites dog."; $wordCount = str_word_count($article);

　　// $wordCount = 8

　　4 将字符串变成HTML的连接

　　$url = "W.J. Gilmore, LLC (http://www.glzy8.com)";

　　$url = preg_replace("/http://([A-z0-9./-]+)/", "$0", $url);

　　5 去除字符中的HTML字符串

　　$text = strip_tags($input, "

　　");

　　6 nl2br:

　　$comment = nl2br($comment);

　　变成带HTML格式

　　7 Wordwrap

　　限制每行字数

　　$speech = "Four score and seven years ago our fathers brought forth, upon this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.";

　　echo wordwrap($speech, 30);

　　输出：

　　Four score and seven years ago our fathers brought forth, upon this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.