html - php如何在二维数组中，再计算单列的最值。
在做一个统计网页，现在遇到这样一个问题。
如标题：怎么在二维数组中，找到每个单列的最值。
如图，我需要找到需要的单列的最值，然后应用相应的样式。
现在的显示效果
需要实现的显示效果
相应的颜色css类我已经写好了，只需要引用就行了。
不用js代码，也就是说直接在生成的时候直接判断，再引用样式。
部分代码如下：
<code> $index=1;
while($row = mysql_fetch_array($result)){
echo '<tr>';
echo '<td class="center essential">'.$index.'</td>';
echo '<td class="essential"><a class="user" href="search.php?qq='.%24row%5Bqq%5D.'&user='.%24row%5Buser%5D.'">'.$row[user].'</a></td>';
echo '<td class="essential">'.$row[speed].'</td>';
echo '<td class="essential">'.$row[keystroke].'</td>';
echo '<td class="essential">'.$row[length].'</td>';
echo '<td class="essential">'.$row[backspace].'</td>';
echo '<td>'.$row[wrong].'</td>';
echo '<td class="center">'.$row[ime].'</td>';
echo '<td class="center">'.$row[wordcount].'</td>';
echo '<td class="center">'.$row[timecost].'</td>';
echo '<td>'.$row[qq].'</td>';
echo '<td class="center">'.date("H:i",strtotime($row[timestart])).'</td>';
echo '<td class="center">'.$row[repeat].'</td>';
echo '<td>'.$row[score].'</td>';
echo '<td>'.$row[scoresum].'</td>';
echo '</tr>';
$index++;
/************************************************
其中的essential和center没什么其它作用，可以忽略。
************************************************/
}</code>切成数组什么的好说，我只是不知道存入数组后如何才能进行判断。
求大神说的细点，小白在此谢过。
回复内容：
在做一个统计网页，现在遇到这样一个问题。
如标题：怎么在二维数组中，找到每个单列的最值。
如图，我需要找到需要的单列的最值，然后应用相应的样式。
现在的显示效果
需要实现的显示效果
相应的颜色css类我已经写好了，只需要引用就行了。
不用js代码，也就是说直接在生成的时候直接判断，再引用样式。
部分代码如下：
<code> $index=1;
while($row = mysql_fetch_array($result)){
echo '<tr>';
echo '<td class="center essential">'.$index.'</td>';
echo '<td class="essential"><a class="user" href="search.php?qq='.%24row%5Bqq%5D.'&user='.%24row%5Buser%5D.'">'.$row[user].'</a></td>';
echo '<td class="essential">'.$row[speed].'</td>';
echo '<td class="essential">'.$row[keystroke].'</td>';
echo '<td class="essential">'.$row[length].'</td>';
echo '<td class="essential">'.$row[backspace].'</td>';
echo '<td>'.$row[wrong].'</td>';
echo '<td class="center">'.$row[ime].'</td>';
echo '<td class="center">'.$row[wordcount].'</td>';
echo '<td class="center">'.$row[timecost].'</td>';
echo '<td>'.$row[qq].'</td>';
echo '<td class="center">'.date("H:i",strtotime($row[timestart])).'</td>';
echo '<td class="center">'.$row[repeat].'</td>';
echo '<td>'.$row[score].'</td>';
echo '<td>'.$row[scoresum].'</td>';
echo '</tr>';
$index++;
/************************************************
其中的essential和center没什么其它作用，可以忽略。
************************************************/
}</code>切成数组什么的好说，我只是不知道存入数组后如何才能进行判断。
求大神说的细点，小白在此谢过。
知道怎么弄了， 先从数据库把每列的数据先读取出来，然后用max(),min()计算每列的最值
然后，在输出的时候，当前列的数据是否等于这一列的最值，等于的话就给予特殊样式。
其中需要注意的一项是：mysql_fetch_array只能取一次数据，取完一次之后里面就没有数据了。所以先把查询到的数据转存。
部分代码如下：
<code> //转存查询的结果
$temp_result = array();
while($row=mysql_fetch_array($result)){
array_push($temp_result, $row);
}
//获取每个列的所有数据，算出最值；
$speed = array(); $keystroke = array(); $length = array(); $backspace = array(); $repeat = array();
foreach ($temp_result as $row ) {
array_push($speed, $row[speed]);
array_push($keystroke, $row[keystroke]);
array_push($length, $row[length]);
array_push($backspace, $row[backspace]);
array_push($repeat, $row[repeat]);
}
$max_speed=max($speed);
$max_keystroke=max($keystroke);
$min_length = min($length);
$min_backspace = min($backspace);
$max_repeat = max($repeat);
// 输出列表
$index=1;
foreach ($temp_result as $row ) {
echo '<tr>';
echo '<td class="center essential">'.$index.'</td>';
echo '<td class="essential"><a class="user" href="search.php?qq='.%24row%5Bqq%5D.'&user='.%24row%5Buser%5D.'">'.$row[user].'</a></td>';
if($row[speed]==$max_speed){
echo '<td class="essential bg-yellow">'.$row[speed].'</td>';
}else{
echo '<td class="essential">'.$row[speed].'</td>';
}
if($row[keystroke]==$max_keystroke){
echo '<td class="essential bg-green">'.$row[keystroke].'</td>';
}else{
echo '<td class="essential">'.$row[keystroke].'</td>';
}
if($row[length]==$min_length){
echo '<td class="essential bg-red">'.$row[length].'</td>';
}else{
echo '<td class="essential">'.$row[length].'</td>';
}
if($row[backspace]==$min_backspace){
echo '<td class="essential bg-blue">'.$row[backspace].'</td>';
}else{
echo '<td class="essential">'.$row[backspace].'</td>';
}
echo '<td>'.$row[wrong].'</td>';
echo '<td class="center">'.$row[wordcount].'</td>';
echo '<td class="center">'.$row[timecost].'</td>';
echo '<td class="center">'.date("m-d H:i",strtotime($row[timestart])).'</td>';
if($row[repeat]==$max_repeat){
echo '<td class="center bg-green">'.$row[repeat].'</td>';
}else{
echo '<td class="center">'.$row[repeat].'</td>';
}
echo '<td>'.$row[score].'</td>';
echo '<td>'.$row[scoresum].'</td>';
echo '</tr>';
$index++;
}</code>最终的显示效果
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