ArrayIterator::rewind()函數是PHP中的內置函數,用於將陣列倒回開始。
用法:
void ArrayIterator::rewind( void )
參數:該函數不接受任何參數。
返回值:該函數不返回任何值。
以下示例程序旨在說明PHP中的ArrayIterator::rewind()函數:
示例1:
<?php
// Declare an ArrayIterator
$arrItr = new ArrayIterator(
array(
"a" => 4,
"b" => 2,
"g" => 8,
"d" => 6,
"e" => 1,
"f" => 9
)
);
// Move to last position
$arrItr->seek(5);
// Display the next value
var_dump($arrItr->next());
// Move to start position
$arrItr->rewind();
// Display the current element
echo $arrItr->current();
?>
輸出:
NULL 4
示例2:
<?php
// Declare an ArrayIterator
$arrItr = new ArrayIterator(
array(
"b" => "for",
"a" => "Geeks",
"e" => "Science",
"c" => "Geeks",
"f" => "Portal",
"d" => "Computer"
)
);
// Check the validity of ArrayIterator
while($arrItr->valid()) {
$arrItr->next();
}
// Move to start position
$arrItr->rewind();
// Display the current element
echo $arrItr->current();
?>
輸出:
for
參考: https://www.php.net/manual/en/arrayiterator.rewind.php
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