PHP函数不能工作，几个参数，数组返回

Question

<?php
function calculateTotals($column,$rowStart,$rowEnd,$boolSim) {
$queryTotalPage = "SELECT SUM(`" . $column . "`) FROM `mylogbook` WHERE `flightNumber` >= " . $rowStart . " AND `flightNumber` <= " . $rowEnd . " AND `simulator` = " . $boolSim;
$resultTotalPage = mysql_query($queryTotalPage) or die(mysql_error());
while($row = mysql_fetch_array($resultTotalPage)){
    $totalTimeHoursPage = floor($row["SUM(" . $column . ")"]/60);
    $totalTimeMinutesPage = sprintf('%02d', ($row["SUM(" . $column . ")"] % 60));
}
$queryTotalPreviousPages = "SELECT SUM(`" . $column . "`) FROM `mylogbook` WHERE `flightNumber` >= 1 AND `flightNumber` < " . $rowStart . " AND `simulator` = " . $boolSim;
$resultTotalPreviousPages = mysql_query($queryTotalPreviousPages) or die(mysql_error());

while($row = mysql_fetch_array($resultTotalPreviousPages)){
    $totalTimeHoursPreviousPages = floor($row["SUM(" . $column . ")"]/60);
    $totalTimeMinutesPreviousPages = sprintf('%02d', ($row["SUM(" . $column . ")"] % 60));
}
$queryTotal = "SELECT SUM(`" . $column . "`) FROM `mylogbook` WHERE `flightNumber` >= 1 AND `flightNumber` <= " . $rowEnd . " AND `simulator` = " . $boolSim;
$resultTotal = mysql_query($queryTotal) or die(mysql_error());

while($row = mysql_fetch_array($resultTotal)){
    $totalTimeHours = floor($row["SUM(" . $column . ")"]/60);
    $totalTimeMinutes = sprintf('%02d', ($row["SUM(" . $column . ")"] % 60));
}
return array($totalTimeHoursPage,$totalTimeMinutesPage,$totalTimeHoursPreviousPages,$totalTimeMinutesPreviousPages,$totalTimeHours,$totalTimeMinutes);
}
// TEST calculate totals
echo "TEST CALC";
calculateTotals("timePIC","1","100","0");
echo $calculateTotals[0];
?>

此函数以前是单个代码块。现在，我尝试将其更改为泛型函数。不会产生错误。函数的输出数组看起来是空的。

Answer 1

您不会将函数调用的输出存储到任何地方并尝试执行echo。

您应该将返回的输出存储到某个变量(例如，$calculateTotals)，然后执行echo

echo "TEST CALC";
$calculateTotals = calculateTotals("timePIC","1","100","0");
echo $calculateTotals[0];

这应该能行。