Php 对for循环中的重复元素进行分组和求和
我有这样一个for循环:Php 对for循环中的重复元素进行分组和求和,php,loops,Php,Loops,我有这样一个for循环: for((int) $i = 0; $i < $number_of_updates; $i++) { //query here $result = mysql_query($query); list($name) = mysql_fetch_row($result); $points = 1; //some functions to execute here... and the
for((int) $i = 0; $i < $number_of_updates; $i++)
{
//query here
$result = mysql_query($query);
list($name) = mysql_fetch_row($result);
$points = 1;
//some functions to execute here... and then
//store results in session to show on other page
$output = $points.' times '.$name;
$_SESSION['item'][] = $output;
}
((int)$i=0;$i<$u更新次数;$i++)的
{
//在此查询
$result=mysql\u query($query);
list($name)=mysql\u fetch\u行($result);
$points=1;
//在这里执行一些函数…然后
//在会话中存储结果以显示在其他页面上
$output=$points.'times'.$name;
$\会话['item'][]=$output;
}
然后我在查看页面上显示我的结果,如下所示:
foreach (array_unique($_SESSION['item']) as $output)
{
echo ('<p>'.$output.'</p>');
}
foreach(数组\u唯一($\u会话['item'])作为$output)
{
回声(“”.$output.“”);
}
它在循环中重复我的结果,如下所示:
for((int) $i = 0; $i < $number_of_updates; $i++)
{
//query here
$result = mysql_query($query);
list($name) = mysql_fetch_row($result);
$points = 1;
//some functions to execute here... and then
//store results in session to show on other page
$output = $points.' times '.$name;
$_SESSION['item'][] = $output;
}
1倍富
1倍富
1倍吧
1倍富
等等
现在是问题。我如何总结这些结果,使它们不会重复?相反,它们是这样显示的:
三倍福
1倍条形图用户
数组\u计数\u值
for(/*(int) <- this is not neccessary (c++ background?) */ $i = 0; $i < $number_of_updates; $i++)
{
// your code
$_SESSION['item'][] = $name;
}
foreach(array_count_values($_SESSION['item']) as $name => $times)
echo ('<p>'.$times.' times '.$name.'</p>');
(/*(int)$次)的
echo(“”.$times.“$name.””);
当然,直接计算值更节省内存和时间。仅当您需要以某种方式保留元素的顺序时,才需要此版本。用户
array\u count\u value
for(/*(int) <- this is not neccessary (c++ background?) */ $i = 0; $i < $number_of_updates; $i++)
{
// your code
$_SESSION['item'][] = $name;
}
foreach(array_count_values($_SESSION['item']) as $name => $times)
echo ('<p>'.$times.' times '.$name.'</p>');
(/*(int)$次)的
echo(“”.$times.“$name.””);
当然,直接计算值更节省内存和时间。只有在需要保留元素顺序的情况下,才需要此版本。为什么不直接将总和存储在数组中
for((int) $i = 0; $i < $number_of_updates; $i++)
{
//query here
$result = mysql_query($query);
list($name) = mysql_fetch_row($result);
$points = 1;
//some functions to execute here... and then
//store results in session to show on other page
$_SESSION['item'][$name] +=$points;
}
((int)$i=0;$i<$u更新次数;$i++)的
{
//在此查询
$result=mysql\u query($query);
list($name)=mysql\u fetch\u行($result);
$points=1;
//在这里执行一些函数…然后
//在会话中存储结果以显示在其他页面上
$\会话['item'][$name]+=$points;
}
为什么不直接将总和存储在数组中
for((int) $i = 0; $i < $number_of_updates; $i++)
{
//query here
$result = mysql_query($query);
list($name) = mysql_fetch_row($result);
$points = 1;
//some functions to execute here... and then
//store results in session to show on other page
$_SESSION['item'][$name] +=$points;
}
((int)$i=0;$i<$u更新次数;$i++)的
{
//在此查询
$result=mysql\u query($query);
list($name)=mysql\u fetch\u行($result);
$points=1;
//在这里执行一些函数…然后
//在会话中存储结果以显示在其他页面上
$\会话['item'][$name]+=$points;
}
试试这个:
for((int) $i = 0; $i < $number_of_updates; $i++)
{
//query here
$result = mysql_query($query);
list($name) = mysql_fetch_row($result);
$points = 1;
//some functions to execute here... and then
//store results in session to show on other page
//$output = $points.' times '.$name;
//$_SESSION['item'][] = $output;
if( isset( $_SESSION['count'][$name] )){
$prev = $_SESSION['count'][$name];
}else{
$prev = 0;
}
$_SESSION['count'][$name] = $points + $prev ;
}
print_r( $_SESSION['count'] );
((int)$i=0;$i<$u更新次数;$i++)的
{
//在此查询
$result=mysql\u query($query);
list($name)=mysql\u fetch\u行($result);
$points=1;
//在这里执行一些函数…然后
//在会话中存储结果以显示在其他页面上
//$output=$points.'times'.$name;
//$\会话['item'][]=$output;
if(isset($\会话['count'][$name])){
$prev=$\会话['count'][$name];
}否则{
$prev=0;
}
$\会话['count'][$name]=$points+$prev;
}
打印($_会话['count']);
试试这个:
for((int) $i = 0; $i < $number_of_updates; $i++)
{
//query here
$result = mysql_query($query);
list($name) = mysql_fetch_row($result);
$points = 1;
//some functions to execute here... and then
//store results in session to show on other page
//$output = $points.' times '.$name;
//$_SESSION['item'][] = $output;
if( isset( $_SESSION['count'][$name] )){
$prev = $_SESSION['count'][$name];
}else{
$prev = 0;
}
$_SESSION['count'][$name] = $points + $prev ;
}
print_r( $_SESSION['count'] );
((int)$i=0;$i<$u更新次数;$i++)的
{
//在此查询
$result=mysql\u query($query);
list($name)=mysql\u fetch\u行($result);
$points=1;
//在这里执行一些函数…然后
//在会话中存储结果以显示在其他页面上
//$output=$points.'times'.$name;
//$\会话['item'][]=$output;
if(isset($\会话['count'][$name])){
$prev=$\会话['count'][$name];
}否则{
$prev=0;
}
$\会话['count'][$name]=$points+$prev;
}
打印($_会话['count']);
PSA:mysql*函数是。不建议编写新代码,因为这样会阻止您将来升级。相反,使用or和.PSA:mysql的。不建议编写新代码,因为这样会阻止您将来升级。相反,请使用或和。您可以回送$\u会话['item']:foreach($\u会话['item']作为$name=>$times){echo(“$times$name”);}
您可以回送$\u会话['item']:foreach($\u会话['item']作为$name=>$times){echo($times$name”);