添加值的foreach PHP

Question

返回我有此代码

<?php if($grades->subcompid==$subcomp->id && $grades->compid=='1' && $grades->termid=='1' && $grades->recordid==$recid && $grades->studentid==$student->studentid){ 
    echo $grades->grade; 
?> 

我想回声的值20，25，14，12和45--和上面的代码这样做。

的问题是我要添加这些值来获得116所以我这样做：

$midtermg = 0;  
<?php if($grades->subcompid==$subcomp->id && $grades->compid=='1' && $grades->termid=='1' && $grades->recordid==$recid && $grades->studentid==$student->studentid){ 
    $midtermg = $midtermg + $grades->grade; 
    echo $midtermg; 
} 

然而，它的返回值'20 45 59 71 116' 。它将该值添加到下一个值并每个回显。我试着做echo end($midtermg);，但它说它不是一个数组，所以它不起作用。如果我只想让116回应，该怎么办？

* if语句返回正确的值，所以请不介意它

Answer 1

就像你正在打印内部内loop.And if。刚和值值打印后if条件this.Every时间。

<?php 
$midtermg = 0;  
if($grades->subcompid==$subcomp->id && $grades->compid=='1' && $grades->termid=='1' && $grades->recordid==$recid && $grades->studentid==$student->studentid){ 
    $midtermg = $midtermg + $grades->grade; 

} 

echo $midtermg; 

Answer 2

初始化一个数组并将条件满足值推入数组，然后您可以使用此数组进行操作。

<?php 
$midtermg = 0; 
$a_results= array();  
if($grades->subcompid==$subcomp->id && $grades->compid=='1' && $grades->termid=='1' && $grades->recordid==$recid && $grades->studentid==$student->studentid){ 
    // $midtermg = $midtermg + $grades->grade; 
    array_push($a_results, $grades->grade); 
} 
echo array_sum($a_results);