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好家伙变量我需要找到两个不同的环,其是求和环和总数环路之间的差异,如图控制器代码如下笨。减去两位来自两个不同的循环
function summary() {
echo '<table>';
$summation=$this->select_model->sum_income("date_of_income BETWEEN '" . $start . "' AND '" . $last . "'");
foreach($summation as $sum){
echo '<tr><td>Total Income</td> <td >'.$sum['total'].'</td></tr>';
}
$totals=$this->select_model->sum_expenditure("date_of_expenditure BETWEEN '" . $start . "' AND '" . $last . "'");
foreach($totals as $total){
echo '<tr><td>Total Expenditure</td><td ><strong>'.$total['total'].'<</td></tr>';
}
//display differences here:
echo '<tr><td>'.**$sum['total']-$total['total']**.'</td></tr>'
echo '</table>';
}
我们应该帮助你做什么? –
如何从$ sum ['total']减去$ total ['total']外部循环 –
你不能这样做。 Foreach用于调用数组的每个元素,当然'$ total'和'$ sum'都是别名。外面的'foreach',它是未知的。试试其他方法。 – Ukasyah