PHP 获取数组任意下标key的上一个prev和下一个next下标值


$value){

$steps->add($key);

}

$steps->setCurrent(3);//参数为key值
echo '上一个下标:'.$steps->getPrev()."
"; echo '指定的下标:'.$steps->getCurrent()."
"; echo '下一个下标:'.$steps->getNext()."
"; class Steps { private $all; private $count; private $curr; function __construct() { $this->count = 0; } function add($step) { $this->count++; $this->all[$this->count] = $step; } function setCurrent($step) { reset($this->all); for ($i = 1; $i count; $i++) { if ($this->all[$i] == $step) break; next($this->all); } $this->curr = current($this->all); } function getCurrent() { return $this->curr; } function getNext() { self::setCurrent($this->curr); return next($this->all); } function getPrev() { self::setCurrent($this->curr); return prev($this->all); } }
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打印结果:

上一个下标:2
指定的下标:3
下一个下标:4
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http://www.bkjia.com/PHPjc/815135.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/815135.htmlTechArticlePHP 获取数组任意下标key的上一个prev和下一个next下标 $value){$steps->add($key);}$steps->setCurrent(3);//参数为key值echo 上一个下标:.$steps->getPrev()."...

09-04 19:57