学步园

function TextDiff($old, $new) {<br /> $mode = true;<br /> if(! is_array($old)) {<br /> $bodyA = explode("/n", $old);<br /> $bodyB = explode("/n", $new);<br /> $mode = false;<br /> }else {<br /> $bodyA = $old;<br /> $bodyB = $new;<br /> }</p> <p> $result['added'] = array_diff_assoc($bodyA, $bodyB);<br /> $result['deleted'] = array_diff_assoc($bodyB, $bodyA);<br /> if($mode)<br /> return $result;<br /> if(count($result['added']) >= count($result['deleted']))<br /> $ar = $result['added'];<br /> else<br /> $ar = $result['deleted'];<br /> $retval = '';<br /> foreach($ar as $k=>$v) {<br /> $added = isset($result['added'][$k]) ? $result['added'][$k] : "";<br /> $deleted = isset($result['deleted'][$k]) ? $result['deleted'][$k] : "";<br /> preg_match_all("/[/x81-/xfe]?./",$added,$a1);</p> <p> preg_match_all("/[/x81-/xfe]?./",$deleted,$b1);<br /> $p = TextDiff($b1[0],$a1[0]);<br /> foreach($p['added'] as $key=>$value){<br /> $b1[0][$key] = "<font color=lime>$value</font>";<br /> }<br /> $deleted = join("",$b1[0]);<br /> foreach($p['deleted'] as $key=>$value){<br /> $a1[0][$key] = "<s><font color=red>$value</font></s>";<br /> }<br /> $added = join("",$a1[0]);<br /> $retval .= "<br><br>第".($k+1)."行";<br /> $retval .= "<br>[原文]$added";<br /> $retval .= "<br>[新文]$deleted";<br /> }<br /> return $retval;<br /> }</p> <p>

本函数适用于 GBK 编码，如是 utf-8 编码请将 "/[/x81-/xfe]?./" 改为 "/./u"