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1 <?php 2 3 if (class_exists('SplFixedArray')) { 4 return; 5 } 6 7 /** 8 * The SplFixedArray class provides the main functionalities of array. The 9 * main differences between a SplFixedArray and a normal PHP array is that 10 * the SplFixedArray is of fixed length and allows only integers within 11 * the range as indexes. The advantage is that it allows a faster array 12 * implementation. 13 */ 14 class SplFixedArray implements Iterator, ArrayAccess, Countable 15 { 16 /** @var array<int, mixed> */ 17 private $internalArray = array(); 18 19 /** @var int $size */ 20 private $size = 0; 21 22 /** 23 * SplFixedArray constructor. 24 * @param int $size 25 */ 26 public function __construct($size = 0) 27 { 28 $this->size = $size; 29 $this->internalArray = array(); 30 } 31 32 /** 33 * @return int 34 */ 35 public function count() 36 { 37 return count($this->internalArray); 38 } 39 40 /** 41 * @return array 42 */ 43 public function toArray() 44 { 45 ksort($this->internalArray); 46 return (array) $this->internalArray; 47 } 48 49 /** 50 * @param array $array 51 * @param bool $save_indexes 52 * @return SplFixedArray 53 * @psalm-suppress MixedAssignment 54 */ 55 public static function fromArray(array $array, $save_indexes = true) 56 { 57 $self = new SplFixedArray(count($array)); 58 if($save_indexes) { 59 foreach($array as $key => $value) { 60 $self[(int) $key] = $value; 61 } 62 } else { 63 $i = 0; 64 foreach (array_values($array) as $value) { 65 $self[$i] = $value; 66 $i++; 67 } 68 } 69 return $self; 70 } 71 72 /** 73 * @return int 74 */ 75 public function getSize() 76 { 77 return $this->size; 78 } 79 80 /** 81 * @param int $size 82 * @return bool 83 */ 84 public function setSize($size) 85 { 86 $this->size = $size; 87 return true; 88 } 89 90 /** 91 * @param string|int $index 92 * @return bool 93 */ 94 public function offsetExists($index) 95 { 96 return array_key_exists((int) $index, $this->internalArray); 97 } 98 99 /** 100 * @param string|int $index 101 * @return mixed 102 */ 103 public function offsetGet($index) 104 { 105 /** @psalm-suppress MixedReturnStatement */ 106 return $this->internalArray[(int) $index]; 107 } 108 109 /** 110 * @param string|int $index 111 * @param mixed $newval 112 * @psalm-suppress MixedAssignment 113 */ 114 public function offsetSet($index, $newval) 115 { 116 $this->internalArray[(int) $index] = $newval; 117 } 118 119 /** 120 * @param string|int $index 121 */ 122 public function offsetUnset($index) 123 { 124 unset($this->internalArray[(int) $index]); 125 } 126 127 /** 128 * Rewind iterator back to the start 129 * @link https://php.net/manual/en/splfixedarray.rewind.php 130 * @return void 131 * @since 5.3.0 132 */ 133 public function rewind() 134 { 135 reset($this->internalArray); 136 } 137 138 /** 139 * Return current array entry 140 * @link https://php.net/manual/en/splfixedarray.current.php 141 * @return mixed The current element value. 142 * @since 5.3.0 143 */ 144 public function current() 145 { 146 /** @psalm-suppress MixedReturnStatement */ 147 return current($this->internalArray); 148 } 149 150 /** 151 * Return current array index 152 * @return int The current array index. 153 */ 154 public function key() 155 { 156 return key($this->internalArray); 157 } 158 159 /** 160 * @return void 161 */ 162 public function next() 163 { 164 next($this->internalArray); 165 } 166 167 /** 168 * Check whether the array contains more elements 169 * @link https://php.net/manual/en/splfixedarray.valid.php 170 * @return bool true if the array contains any more elements, false otherwise. 171 */ 172 public function valid() 173 { 174 if (empty($this->internalArray)) { 175 return false; 176 } 177 $result = next($this->internalArray) !== false; 178 prev($this->internalArray); 179 return $result; 180 } 181 182 /** 183 * Do nothing. 184 */ 185 public function __wakeup() 186 { 187 // NOP 188 } 189 }
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