简单的内容差异对比函数

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

 

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