我使用數(shù)組打開文件，如果數(shù)組鍵中的值匹配，則將打開與值相關(guān)的文件。當(dāng)我嘗試時，它將打開與數(shù)據(jù)庫中的數(shù)據(jù)一樣多的文件。while ($d = mysqli_fetch_array($query)) { $d['grade'] = array("2", "3", "4", "5", "6"); if(in_array("2", $d)) { include "table/grade2_tab.php"; } if(in_array("3", $d)) { include "table/grade3_tab.php"; } if(in_array("4", $d)) { include "table/grade4_tab.php"; } if(in_array("5", $d)) { include "table/grade5_tab.php"; } if(in_array("6", $d)) { include "table/grade6_tab.php"; } }?>假設(shè)我的數(shù)據(jù)庫中有 6 個數(shù)據(jù)，例如：=>grade6=>grade6=>grade6=>grade6=>grade3=>grade2如果數(shù)據(jù)已在數(shù)組中找到，則只需為每個鍵打開一個文件。如何實現(xiàn)這一目標(biāo)？我嘗試使用if but datagrade6打開四次。我不知道如何處理這個問題，我用 foreach 搜索分組數(shù)據(jù)，但我不知道用 foreach 打開文件。任何答案表示贊賞。
2 回答
滄海一幻覺
TA貢獻1824條經(jīng)驗 獲得超5個贊
創(chuàng)建另一個數(shù)組來保存您已經(jīng)使用過的值，您還可以使用循環(huán)來大大簡化代碼。
$grades = array("2", "3", "4", "5", "6");
//create an empty array to hold grades once they are displayed
$used = [];
while ($d = mysqli_fetch_array($query)) {
//loop through each grade value
foreach($grades as $grade) {
//check if `$grade` is in array `$d`
//AND check if `$used[$grade]` has not been set (if it hasn't been set, it hasn't been displayed)
if(in_array($grade, $d) && !isset($used[$grade])) {
//set $used[$grade] so the previous check will fail if this grade is a duplicate
$used[$grade] = true;
//include your php file
include "table/grade{$grade}_tab.php";
}
}
}
此解決方案意味著您不再需要為每個等級添加 IF 塊。
largeQ
TA貢獻2039條經(jīng)驗 獲得超8個贊
嘗試將可用數(shù)據(jù)存儲在另一個數(shù)組上，并檢查數(shù)據(jù)是否使用過
$useArray = array();
$d['grade'] = array("2", "3", "4", "5", "6");
while ($d = mysqli_fetch_array($query))
{
if(in_array("2", $d) && !in_array("2",$useArray))
{
$useArray[] = 2;
include "table/grade2_tab.php";
}
if(in_array("3", $d) && !in_array("3",$useArray))
{
$useArray[] = 3;
include "table/grade3_tab.php";
}
if(in_array("4", $d) && !in_array("4",$useArray))
{
$useArray[] = 4;
include "table/grade4_tab.php";
}
if(in_array("5", $d) && !in_array("5",$useArray))
{
$useArray[] = 5;
include "table/grade5_tab.php";
}
if(in_array("6", $d) && !in_array("6",$useArray))
{
$useArray[] = 6;
include "table/grade6_tab.php";
}
}
?>
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