php給一組指定關鍵詞添加span標籤的方法_php技巧

本文執行個體講述了php給一組指定關鍵詞添加span標籤的方法。分享給大家供大家參考。具體如下：

這裡是php給一組指定的關鍵詞添加span標籤，高亮反白關鍵詞

// 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;}

希望本文所述對大家的php程式設計有所協助。