fix the iterator implementation. If the array contains a value of false, the previous implementation would bail (the valid() function issues current() which returns false, just as if the array returns false; the new implementation keeps its own index, so there's no need to use current().

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@301637 c90b9560-bf6c-de11-be94-00142212c4b1

language/oop5/iterations.xml

@@ -82,6 +82,7 @@ private => private var
 class MyIterator implements Iterator
 {
     private $var = array();
+    private $index = 0;
 
     public function __construct($array)
     {
@@ -90,34 +91,49 @@ class MyIterator implements Iterator
         }
     }
 
-    public function rewind() {
+    public function rewind()
+    {
         echo "rewinding\n";
-        reset($this->var);
+        $this->index = 0;
     }
 
-    public function current() {
-        $var = current($this->var);
+    public function current()
+    {
+        $k = array_keys($this->var);
+        $var = $this->var[$k[$this->index]];
         echo "current: $var\n";
         return $var;
     }
 
-    public function key() {
-        $var = key($this->var);
+    public function key()
+    {
+        $k = array_keys($this->var);
+        $var = $k[$this->index];
         echo "key: $var\n";
         return $var;
     }
 
-    public function next() {
-        $var = next($this->var);
-        echo "next: $var\n";
-        return $var;
+    public function next()
+    {
+        $k = array_keys($this->var);
+        if (isset($k[++$this->index])) {
+            $var = $this->var[$k[$this->index]];
+            echo "next: $var\n";
+            return $var;
+        } else {
+            echo "next:\n";
+            return false;
+        }
     }
 
-    public function valid() {
-        $var = $this->current() !== false;
+    public function valid()
+    {
+        $k = array_keys($this->var);
+        $var = isset($k[$this->index]);
         echo "valid: {$var}\n";
         return $var;
     }
+
 }
 
 $values = array(1,2,3);
@@ -133,26 +149,22 @@ foreach ($it as $a => $b) {
    <screen role="php">
 <![CDATA[
 rewinding
-current: 1
 valid: 1
 current: 1
 key: 0
 0: 1
 next: 2
-current: 2
 valid: 1
 current: 2
 key: 1
 1: 2
 next: 3
-current: 3
 valid: 1
 current: 3
 key: 2
 2: 3
-next:
-current:
-valid:
+next: (no more)
+valid: 
 ]]>
    </screen>