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PHP CachingIterator current()用法及代碼示例


CachingIterator::current()函數是PHP中的內置函數,用於返回當前元素。

用法:

mixed CachingIterator::current( void )

參數:該函數不接受任何參數。


返回值:此函數返回CachingIterator的當前值。

以下示例程序旨在說明PHP中的CachingIterator::current()函數:

示例1:

<?php 
    
// Declare an array 
$arr = array('G', 'e', 'e', 'k', 's'); 
    
// Create a new CachingIterator 
$cachIt = new CachingIterator( 
    new ArrayIterator($arr),  
    CachingIterator::FULL_CACHE 
); 
   
// Display the result 
foreach($cachIt as $element) { 
    echo $cachIt->current() . " "; 
} 
    
?>
輸出:
G e e k s

示例2:

<?php 
    
// Declare an ArrayIterator 
$arr = array( 
    "a" => "Geeks", 
    "b" => "for", 
    "c" => "Geeks", 
    "d" => "Computer", 
    "e" => "Science", 
    "f" => "Portal"
); 
  
// Create a new CachingIterator 
$cachIt = new CachingIterator( 
    new ArrayIterator($arr),  
    CachingIterator::FULL_CACHE 
); 
  
// Display the result 
foreach($cachIt as $element) { 
    echo $cachIt->current() . "\n"; 
} 
    
?>
輸出:
Geeks
for
Geeks
Computer
Science
Portal

參考: https://www.php.net/manual/en/cachingiterator.current.php



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注:本文由純淨天空篩選整理自jit_t大神的英文原創作品 PHP | CachingIterator current() Function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。