這是我要排序的陣列。這是由已經存盤在資料庫中的 HTML 表獲取的。但這里它有 50 個索引。這就是我想減少到七個的東西。
(
[0] => Array
(
[0] =>
[1] => data
[2] => data
[3] => data
[4] => data
[5] =>
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[1] => Array
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)
[2] => Array
(
[0] => 1
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
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[3] => Array
(
[0] => 2
[1] => data
[2] => data
[3] => data
[4] => data
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[4] => Array
(
[0] => 3
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
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)
[5] => Array
(
[0] => 4
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
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)
[6] => Array
(
[0] => 5
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
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[7] => Array
(
[0] => 6
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
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[8] => Array
(
[0] => 7
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
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)
[9] => Array
(
[0] => 8
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
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)
[10] => Array
(
[0] => 9
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
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)
我嘗試使用for loops，foreach回圈對該陣列進行排序顯示多達 7 個索引。應該是這樣的。
(
[0] => Array
(
[0] =>
[1] => data
[2] => data
[3] => data
[4] => data
[5] =>
[6] =>
[7] =>
)
[1] => Array
(
[0] =>
[1] =>
[2] =>
[3] =>
[4] =>
[5] =>
[6] =>
[7] =>
)
[2] => Array
(
[0] => 1
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
[7] =>
)
[3] => Array
(
[0] => 2
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
[7] =>
)
[4] => Array
(
[0] => 3
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
[7] =>
)
[5] => Array
(
[0] => 4
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
[7] =>
)
[6] => Array
(
[0] => 5
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
[7] =>
)
[7] => Array
(
[0] => 6
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
[7] =>
)
[8] => Array
(
[0] => 7
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
[7] =>
)
[9] => Array
(
[0] => 8
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
[7] =>
)
[10] => Array
(
[0] => 9
[1] => data
[2] => data
[3] => data
[4] => data
[5] => data
[6] =>
[7] =>
)
)
我嘗試的是，
for ($row = 0; $row <= sizeof($arr); $row ) {
for ($col = 0; $col < 7; $col ) {
$aar[] = $arr[$row][$col];
}
}
這個方法沒有奏效。對此有何方法或建議？
uj5u.com熱心網友回復：
如果您只想保留每個子陣列中的 x 個元素，可以使用array_slice()：
$newArray = [];
foreach($arr as $sub) {
// The example array you say you want have 8 elements, indexes 0-7
// so start with index 0 and take 8
$newArray[] = array_slice($sub, 0, 8);
}
這是一個演示：https : //3v4l.org/WhFm4
uj5u.com熱心網友回復：
這是解決您的問題的一種可能方法。只需在 if 條件中定義鍵限制。希望它能解決你的問題。
$row = [
[
'',
'data',
'data',
'data',
'',
'',
'',
''
],
[
'',
'data',
'data',
'data',
'',
'',
'',
''
]
];
$reducedArray = [];
foreach ($row as $col) {
$tempArray = [];
foreach ($col as $innnerKey => $innerValue) {
// Define your index limit here.
// As you can see I have set the limit to 7
if ($innnerKey <= 7) {
$tempArray[] = $innerValue;
}
}
$reducedArray[] = $tempArray;
}
echo '<pre>';
print_r($row);
echo '</pre>';
echo '<br/>';
echo '<pre>';
print_r($reducedArray);
echo '</pre>';
轉載請註明出處，本文鏈接：https://www.uj5u.com/ruanti/408344.html
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