php给一组指定关键词添加span标签的方法

本文实例讲述了php给一组指定关键词添加span标签的方法。分享给大家供大家参考。具体如下：

这里是php给一组指定的关键词添加span标签，高亮突出显示关键词

// Example use: $spanned = codeWords($string_containing_keywords);// My site: andrew.dx.am// Using colour==blue, but different arrays of words and different // colours can be added.function onlyWholeWords(&$value, $key) {// Ignores words after // comment delimiters.//$value = "//b(" . $value . ")/b/";  // doesn't handle comments//$value = "/^(?:(?!////).)*/K/b(" . $value . ")/b/"; // /K lookbehind alternative is not supported in PHP < 5.2.4, so use:  $value = "/^((?:(?!////).)*)/b" . $value . "/b/";}function addSpan(&$value, $key, $color='blue') {  $value = "$1<span style='color:$color'>" . $value . "</span>";}function codeWords($code) {  $keywords = array('as', 'break', 'case', 'class',  'continue', 'default', 'do', 'elif', 'else',  'elseif', 'for', 'foreach', 'function', 'if',   'new', 'null', 'return', 'self', 'switch',  'this', 'to', 'typeof', 'until',  'var', 'void', 'while', 'with');  $keywords2 = $keywords;  array_walk($keywords, 'onlyWholeWords');  array_walk($keywords2, 'addSpan', 'blue');  $code = preg_replace($keywords, $keywords2, $code);  return $code;}

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