我正在使用一个diff算法（Paul Butler算法），现在我已经开始工作了。我发现我需要mysql_fetch_array（）而不是mysql_fetch _object（），它解决了警告和错误消息，但现在当我尝试print_r（）显示结果时，结果只是"array"，而不是我需要它来显示和比较的数据库中的字段。。。当我调用一个不同的函数时，它似乎会显示字段，但不会对它们进行比较，而是将它们列出两次，并在前面列出Array ( [0] => Array ( [d] => Array ( [0] =>。
知道为什么吗？是的，我在谷歌上搜索了这个，查找了一下，花了大约两天的时间试图找出它。
以下是脚本的部分：
$oldhistory = mysql_query("SELECT history FROM members WHERE id = '$id'") or die(mysql_error());
$oldhistory = mysql_fetch_array($oldhistory);
$newhistory = mysql_query("SELECT history FROM profile_edit WHERE userid = '$id'") or die(mysql_error());
$newhistory = mysql_fetch_array($newhistory);
$oldpersonality= mysql_query("SELECT personality FROM members WHERE id = '$id'") or die(mysql_error());
$oldpersonality = mysql_fetch_array($oldpersonality);
$newpersonality = mysql_query("SELECT personality FROM profile_edit WHERE userid = '$id'") or die(mysql_error());
$newpersonality = mysql_fetch_array($newpersonality);
$oldappearance = mysql_query("SELECT description FROM members WHERE id = '$id'") or die(mysql_error());
$oldappearance = mysql_fetch_array($oldappearance);
$newappearance = mysql_query("SELECT personality FROM profile_edit WHERE userid = '$id'") or die(mysql_error());
$newappearance = mysql_fetch_array($newappearance);
echo "
<form action='"$PHP_SELF?id=$id&s=a'" method='"post'">
<table cellpadding='"5'" cellspacing='"1'" border='"0'" align='"center'" bgcolor='"#234904'">
<tr bgcolor='"#000000'">
<td>History :: </td>
<td>
";
function diffhistory($oldhistory, $newhistory){
foreach($oldhistory as $oindex => $ovalue){
$nkeys = array_keys($newhistory, $ovalue);
foreach($nkeys as $nindex){
$matrix[$oindex][$nindex] = isset($matrix[$oindex - 1][$nindex - 1]) ?
$matrix[$oindex - 1][$nindex - 1] + 1 : 1;
if($matrix[$oindex][$nindex] > $maxlen){
$maxlen = $matrix[$oindex][$nindex];
$omax = $oindex + 1 - $maxlen;
$nmax = $nindex + 1 - $maxlen;
}
}
}
if($maxlen == 0) return array(array('d'=>$oldhistory, 'i'=>$newhistory));
return array_merge(
diffhistory(array_slice($oldhistory, 0, $omax), array_slice($newhistory, 0, $nmax)),
array_slice($newhistory, $nmax, $maxlen),
diffhistory(array_slice($oldhistory, $omax + $maxlen), array_slice($newhistory, $nmax + $maxlen)));
}
function htmlDiffHistory($oldhistory, $newhistory){
$diffhistory = diffhistory(explode(' ', $oldhistory), explode(' ', $newhistory));
foreach($diffhistory as $k){
if(is_array($k))
$ret .= (!empty($k['d'])?"<del><color=red>".implode(' ',$k['d'])."</color></del> ":'').
(!empty($k['i'])?"<ins><color=green>".implode(' ',$k['i'])."</color></ins> ":'');
else $ret .= $k . ' ';
}
return $ret;
}
print_r (diffhistory($oldhistory, $newhistory));
您可能只需要使用mysql_fetch_assoc()（或可能使用mysql_fetch_row()）从数据库中读取关联或索引的数据，而不是同时使用两者，但我怀疑您的方法存在很大缺陷-首先，您要进行6个查询，其中一个要进行查询。您还将一个值数组传递给一个函数，我怀疑该函数需要两个多值数组进行比较。
试试这个（编辑基于下面的评论）：
<?php
function diff($old, $new){
$maxlen = 0;
foreach ($old as $oindex => $ovalue) {
$nkeys = array_keys($new, $ovalue);
foreach ($nkeys as $nindex) {
$matrix[$oindex][$nindex] = isset($matrix[$oindex - 1][$nindex - 1])
? $matrix[$oindex - 1][$nindex - 1] + 1
: 1;
if ($matrix[$oindex][$nindex] > $maxlen) {
$maxlen = $matrix[$oindex][$nindex];
$omax = $oindex + 1 - $maxlen;
$nmax = $nindex + 1 - $maxlen;
}
}
}
return ($maxlen == 0)
? array(array('d'=>$old, 'i'=>$new))
: array_merge(
diff(array_slice($old, 0, $omax), array_slice($new, 0, $nmax)),
array_slice($new, $nmax, $maxlen),
diff(array_slice($old, $omax + $maxlen), array_slice($new, $nmax + $maxlen)));
}
function htmlDiff($old, $new){
$ret = '';
$diff = diff(preg_split('/'s+/', $old), preg_split('/'s+/', $new));
foreach ($diff as $k) {
if (is_array($k)) {
$ret .= (!empty($k['d']) ? "<del style='color:red'>".implode(' ',$k['d'])."</del> " : '')
. (!empty($k['i']) ? "<ins style='color:green'>".implode(' ',$k['i'])."</ins> " : '');
} else {
$ret .= $k . ' ';
}
}
return $ret;
}
$query = "
SELECT
`m`.`history`, `p`.`history` AS 'p_history',
`m`.`personality`, `p`.`personality` AS 'p_personality',
`m`.`description`, `p`.`description` AS 'p_description'
FROM `members` `m`
JOIN `profile_edit` `p` ON `p`.`userid` = `m`.`id`
WHERE `m`.`id` = '".mysql_real_escape_string($id)."'
LIMIT 1
";
$result = mysql_query($query) or die(mysql_error());
$data = mysql_fetch_assoc($result);
echo "
<form action='"$PHP_SELF?id=$id&s=a'" method='"post'">
<table cellpadding='"5'" cellspacing='"1'" border='"0'" align='"center'" bgcolor='"#234904'">
<tr bgcolor='"#000000'">
<td>History :: </td>
<td>".htmlDiff(htmlspecialchars($data['history']), htmlspecialchars($data['p_history']))."</td>
</tr>
<tr bgcolor='"#000000'">
<td>Personality :: </td>
<td>".htmlDiff(htmlspecialchars($data['personality']), htmlspecialchars($data['p_personality']))."</td>
</tr>
<tr bgcolor='"#000000'">
<td>Description :: </td>
<td>".htmlDiff(htmlspecialchars($data['description']), htmlspecialchars($data['p_description']))."</td>
</tr>
</table>
</form>";
尝试使用var_dump打印，如果它只是用于验证数组内的数据：
echo '<pre>'; var_dump($yourArray); echo'</pre>';