php 实现Iterator 接口

<?php

class MyIterator implements Iterator{

private $var = array();

public function __construct($array){

if(is_array($array)){

$this->var = $array;

}

}

public function rewind(){

echo "reminding<br>";

reset($this->var);

}
public function current(){

$var = current($this->var);

echo "current :$var<br>";

return $var;

}

public function key(){

$var = key($this->var);

echo "key::$var<br>";

return $var;

}

public function next(){

$var = next($this->var);
echo "next:$var<br>";

return $var;

}

public function valid(){

$var = $this->current() !== false;

echo "valid:{$var}<br>";

return $var;

}

}
$value = array(1,2,3);

$it = new MyIterator($value);

foreach($it as $a=> $b){

print "$a:$b<br>";
}

<?php

class MyIterator implements Iterator{

private $var = array();

public function __construct($array){

if(is_array($array)){

$this->var = $array;

}

}

public function rewind(){

echo "reminding<br>";

reset($this->var);

}
public function current(){

$var = current($this->var);

echo "current :$var<br>";

return $var;

}

public function key(){

$var = key($this->var);

echo "key::$var<br>";

return $var;

}

public function next(){

$var = next($this->var);
echo "next:$var<br>";

return $var;

}

public function valid(){

$var = $this->current() !== false;

echo "valid:{$var}<br>";

return $var;

}

}
$value = array(1,2,3);

$it = new MyIterator($value);

foreach($it as $a=> $b){

print "$a:$b<br>";
}

?>

?>