PHP iterator, php _php tutorial

PHP iterators, PHP converters

Implements Iterator, realizing the current of Iterator (); Next (); key (); Valid (); Rewind ();

1 
 Php2 /*3 * Define an array first4 * Define the first position $position = 05 * Then return key and value,6 * point to Next location + + $position7  */  8 classMyiteratorImplementsiterator{9         //define a location firstTen         Private $position= 0; One         Private $array; A  -          Public function__construct (Array $array){ -             $this-Array=$array; the         } -         /** - * Rewind the iterator with the first element - * @return void any return value will be ignored. +          */ -          Public function Rewind(){ +             Var_dump(__method__); A             $this->position = 0; at         } -         /** - * Check that the current location is valid - * @return Boolean return value will be bool type Boolean, then evaluate -          */ -          Public functionvalid () { in             Var_dump(__method__); -             //determines whether the first element of an array exists to             return isset($this-Array[$this-position]); +         } -         /** the * Returns the current element * * @return Mixed can return any type.  $          */Panax Notoginseng          Public function  Current(){ -             Var_dump(__method__); the             //returns the first element of an array +             return $this-Array[$this-position]; A         } the         /** + * Returns the key of the current element - * @return Mixed scalar succeeded, or null failed $          */ $          Public function Key(){ -             Var_dump(__method__); -             //returns the key of the first element of the array the             return $this-position; -         }Wuyi         /** the * Advance to the next element - * @return void any return value will be ignored.  Wu          */ -          Public function Next(){ About             Var_dump(__method__); $++$this-position; -         } -     } -  A $array=[ +"Firstelement", the"Secondeleent", -"Lastelement" $     ]; the  the $it=NewMyiterator ($array); the foreach($it  as $key=$value) { the     Echo $key. ' = '.$value; -     Echo"
"; in}

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http://www.bkjia.com/PHPjc/1072323.html www.bkjia.com true http://www.bkjia.com/PHPjc/1072323.html techarticle PHP iterator, PHP implements Iterator, implements Iterator current (); next (); key (); valid (); rewind (); 1? PHP 2/* 3 * First define an array of 4 * fixed First position $position ...

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