1--TEST-- 2SPL: CachingIterator and __toString() 3--FILE-- 4<?php 5 6class Student 7{ 8 private $id; 9 private $name; 10 11 public function __construct($id, $name) 12 { 13 $this->id = $id; 14 $this->name = $name; 15 } 16 17 public function __toString() 18 { 19 return $this->id . ', ' . $this->name; 20 } 21 22 public function getId() 23 { 24 return $this->id; 25 } 26} 27 28class StudentIdFilter extends FilterIterator 29{ 30 private $id; 31 32 public function __construct(ArrayObject $students, Student $other) 33 { 34 FilterIterator::__construct($students->getIterator()); 35 $this->id = $other->getId(); 36 } 37 38 public function accept(): bool 39 { 40 echo "ACCEPT ".$this->current()->getId()." == ".$this->id."\n"; 41 return $this->current()->getId() == $this->id; 42 } 43} 44 45class StudentList implements IteratorAggregate 46{ 47 private $students; 48 49 public function __construct() 50 { 51 $this->students = new ArrayObject(array()); 52 } 53 54 public function add(Student $student) 55 { 56 if (!$this->contains($student)) { 57 $this->students[] = $student; 58 } 59 } 60 61 public function contains(Student $student) 62 { 63 foreach ($this->students as $s) 64 { 65 if ($s->getId() == $student->getId()) { 66 return true; 67 } 68 } 69 return false; 70 } 71 72 public function getIterator(): Traversable { 73 return new CachingIterator($this->students->getIterator(), true); 74 } 75} 76 77$students = new StudentList(); 78$students->add(new Student('01234123', 'Joe')); 79$students->add(new Student('00000014', 'Bob')); 80$students->add(new Student('00000014', 'Foo')); 81 82// The goal is to verify we can access the cached string value even if it was 83// generated by a call to __toString(). To check this we need to access the 84// iterator's __toString() method. 85$it = $students->getIterator(); 86foreach ($it as $student) { 87 echo $it->__toString(), "\n"; 88} 89?> 90--EXPECT-- 9101234123, Joe 9200000014, Bob 93
