<?php
class MyIterator implements Iterator{
private $var = array();
public function __construct($array){
if (is_array($array)) {
$this->var = $array;
}
}
public function rewind() {
echo "rewinding
";
reset($this->var);//将内部指针指向数组中的第一个元素(重置),并返回
}
public function current() {
$var = current($this->var);//返回数组中当前元素的值
echo "当前元素: $var
";
return $var;
}
public function key() {
$var = key($this->var);//返回数组中当前元素的键名
echo "当前元素键值: $var
";
return $var;
}
public function next() {
$var = next($this->var);//将内部指针指向数组中的下一个元素,并返回
echo "下一个元素: $var
";
return $var;
}
public function valid() {
$var = $this->current() !== false;
echo "是否当前值: {$var}
";
return $var;
}
}
$test = array("name"=>"tom","age"=>23,"sex"=>"male","degree"=>"college");
$values = array(1,2,3);
$it = new MyIterator($values);
foreach ($it as $a => $b) {
print "$a: $b
";
}
?>