php正则preg_replace_callback函数用法实例

本文实例讲述了php正则preg_replace_callback函数的用法。分享给大家供大家参考。具体实现方法如下：

php正则表达式功能强大，本范例演示了preg_replace_callback函数的用法

// Define a dummy text, for testing...$Text = "Title: Hello world!";$Text .= "Author: Jonas";$Text .= "This is a example message!";$Text .= "Title: Entry 2";$Text .= "Author: Sonja";$Text .= "Hello world, what"s up!";// This function will replace specific matches// into a new formfunction RewriteText($Match){  // Entire matched section:   // --> /.../  $EntireSection = $Match[0];  // --> "Title: Hello world!"  // Key   // --> ([a-z0-9]+)  $Key      = $Match[1];  // --> "Title"  // Value   // --> ([^]+)  $Value    = $Match[2];  // --> "Hello world!"  // Add some bold (<b>) tags to around the key to  return "<b>" . $Key . "</b>: " . $Value;}// The regular expression will extract and pass all "key: value" pairs to// the "RewriteText" function that is definied above$NewText = preg_replace_callback("/[]([a-z0-9]+): ([^]+)/i", "RewriteText", $Text);// Print the new modified textprint $NewText;

希望本文所述对大家的php程序设计有所帮助。