1--TEST-- 2SPL: Iterator aggregating inner iterator's methods 3--FILE-- 4<?php 5 6class NumericArrayIterator implements Iterator 7{ 8 protected $a; 9 protected $i = 0; 10 11 public function __construct($a) 12 { 13 echo __METHOD__ . "\n"; 14 $this->a = $a; 15 } 16 17 public function rewind(): void 18 { 19 echo __METHOD__ . "\n"; 20 $this->i = 0; 21 } 22 23 public function valid(): bool 24 { 25 $ret = $this->i < count($this->a); 26 echo __METHOD__ . '(' . ($ret ? 'true' : 'false') . ")\n"; 27 return $ret; 28 } 29 30 public function key(): mixed 31 { 32 echo __METHOD__ . "\n"; 33 return $this->i; 34 } 35 36 public function current(): mixed 37 { 38 echo __METHOD__ . "\n"; 39 return $this->a[$this->i]; 40 } 41 42 public function next(): void 43 { 44 echo __METHOD__ . "\n"; 45 $this->i++; 46 } 47 48 public function greaterThan($comp) 49 { 50 echo get_class($this) . '::' . __FUNCTION__ . '(' . $comp . ")\n"; 51 return $this->current() > $comp; 52 } 53} 54 55class SeekableNumericArrayIterator extends NumericArrayIterator implements SeekableIterator 56{ 57 public function seek($index): void 58 { 59 if ($index < count($this->a)) { 60 $this->i = $index; 61 } 62 echo __METHOD__ . '(' . $index . ")\n"; 63 } 64} 65 66$a = array(1, 2, 3, 4, 5); 67$it = new LimitIterator(new NumericArrayIterator($a), 1, 3); 68foreach ($it as $v) 69{ 70 print $v . ' is ' . ($it->greaterThan(2) ? 'greater than 2' : 'less than or equal 2') . "\n"; 71} 72 73echo "===SEEKABLE===\n"; 74$a = array(1, 2, 3, 4, 5); 75$it = new LimitIterator(new SeekableNumericArrayIterator($a), 1, 3); 76foreach($it as $v) 77{ 78 print $v . ' is ' . ($it->greaterThan(2) ? 'greater than 2' : 'less than or equal 2') . "\n"; 79} 80 81echo "===STACKED===\n"; 82echo "Shows '2 is greater than 2' because the test is actually done with the current value which is 3.\n"; 83$a = array(1, 2, 3, 4, 5); 84$it = new CachingIterator(new LimitIterator(new SeekableNumericArrayIterator($a), 1, 3)); 85foreach($it as $v) 86{ 87 print $v . ' is ' . ($it->greaterThan(2) ? 'greater than 2' : 'less than or equal 2') . "\n"; 88} 89 90?> 91--EXPECT-- 92NumericArrayIterator::__construct 93NumericArrayIterator::rewind 94NumericArrayIterator::valid(true) 95NumericArrayIterator::next 96NumericArrayIterator::valid(true) 97NumericArrayIterator::valid(true) 98NumericArrayIterator::current 99NumericArrayIterator::key 100NumericArrayIterator::greaterThan(2) 101NumericArrayIterator::current 1022 is less than or equal 2 103NumericArrayIterator::next 104NumericArrayIterator::valid(true) 105NumericArrayIterator::current 106NumericArrayIterator::key 107NumericArrayIterator::greaterThan(2) 108NumericArrayIterator::current 1093 is greater than 2 110NumericArrayIterator::next 111NumericArrayIterator::valid(true) 112NumericArrayIterator::current 113NumericArrayIterator::key 114NumericArrayIterator::greaterThan(2) 115NumericArrayIterator::current 1164 is greater than 2 117NumericArrayIterator::next 118===SEEKABLE=== 119NumericArrayIterator::__construct 120NumericArrayIterator::rewind 121SeekableNumericArrayIterator::seek(1) 122NumericArrayIterator::valid(true) 123NumericArrayIterator::current 124NumericArrayIterator::key 125SeekableNumericArrayIterator::greaterThan(2) 126NumericArrayIterator::current 1272 is less than or equal 2 128NumericArrayIterator::next 129NumericArrayIterator::valid(true) 130NumericArrayIterator::current 131NumericArrayIterator::key 132SeekableNumericArrayIterator::greaterThan(2) 133NumericArrayIterator::current 1343 is greater than 2 135NumericArrayIterator::next 136NumericArrayIterator::valid(true) 137NumericArrayIterator::current 138NumericArrayIterator::key 139SeekableNumericArrayIterator::greaterThan(2) 140NumericArrayIterator::current 1414 is greater than 2 142NumericArrayIterator::next 143===STACKED=== 144Shows '2 is greater than 2' because the test is actually done with the current value which is 3. 145NumericArrayIterator::__construct 146NumericArrayIterator::rewind 147SeekableNumericArrayIterator::seek(1) 148NumericArrayIterator::valid(true) 149NumericArrayIterator::current 150NumericArrayIterator::key 151NumericArrayIterator::next 152NumericArrayIterator::valid(true) 153NumericArrayIterator::current 154NumericArrayIterator::key 155SeekableNumericArrayIterator::greaterThan(2) 156NumericArrayIterator::current 1572 is greater than 2 158NumericArrayIterator::next 159NumericArrayIterator::valid(true) 160NumericArrayIterator::current 161NumericArrayIterator::key 162SeekableNumericArrayIterator::greaterThan(2) 163NumericArrayIterator::current 1643 is greater than 2 165NumericArrayIterator::next 166SeekableNumericArrayIterator::greaterThan(2) 167NumericArrayIterator::current 1684 is greater than 2 169
