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
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// 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" . $value . "";
}
function codeWords($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;
}
希望本文所述对大家的PHP程序设计有所帮助。
原文链接：https://www.f2er.com/php/22219.html