首页 / 网页编程 / PHP / php给一组指定关键词添加span标签的方法

// 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 = "/（" . $value . "）/";// doesn"t handle comments//$value = "/^（?:（?！//）.）*K（" . $value . "）/"; // K lookbehind alternative is not supported in PHP < 5.2.4, so use:$value = "/^（（?:（?！//）.）*）" . $value . "/";}function addSpan（&$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;}