php中使用key,value,current,next和prev函數(shù)遍歷數(shù)組的方法
Jun 06, 2017 pm 01:39 PM
這篇文章主要介紹了php中使用key,value,current,next和prev函數(shù)遍歷數(shù)組的方法,較為詳細(xì)的分析了php中數(shù)組遍歷的常用技巧與實(shí)例用法,需要的朋友可以參考下
本文實(shí)例講述了php中使用key,value,current,next和prev函數(shù)遍歷數(shù)組的方法。分享給大家供大家參考。具體分析如下：
php中針對(duì)數(shù)組遍歷有一系列的函數(shù)使我們可以非常方便的操作數(shù)組，要遍歷一個(gè)數(shù)組，第一步就是要將指針指向數(shù)組開(kāi)頭，使用reset()函數(shù)。
使用prev()和next()函數(shù)可以查看數(shù)組的上一個(gè)和下一個(gè)元素。在然和位置都可以使用current()函數(shù)獲得當(dāng)前的值，使用key()函數(shù)獲得鍵值
$array = array('foo' => 'bar', 'baz', 'bat' => 2);
function displayArray(&$array) {
reset($array);
while (key($array) !== null) {
echo key($array) .": " .current($array) . PHP_EOL;
next($array);
}
}
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