1 <?php 2 header("content-type:text/html;charset=uft-8"); 3 $arr = array( 4 'a' => 1, 5 'B' => 2, 6 ); 7 $arr = array_change_key_case($arr,CASE_UPPER); 8 echo "array_change_key_case: CASE_UPPER ...CASE_LOWER the same as CASE_UPPER<pre>"; 9 print_r($arr); 10 echo "</pre><br/>"; 11 12 $arr = array( 13 'a' => 1, 14 'v' => 2, 15 'c' => 3, 16 'd' => 4, 17 'e' => 5, 18 ); 19 //对数组进行分块,是否保留原有的key,array_chunk($inputs,$size[,bool $preserve_key]) 20 echo "array_chunk: <pre>"; 21 print_r(array_chunk($arr, 2 , true)); 22 echo "</pre><br/>"; 23 24 //对key和value进行组合，两个数组的个数要相同，不然会爆warning 25 $a = array('1','2','3','4'); 26 $b = array('a','b','c','d'); 27 echo "array_combine: <pre>"; 28 print_r(array_combine($a, $b)); 29 echo "</pre><br/>"; 30 31 //对数组中的value进行计算 32 $arr = array( 33 'a' => 1, 34 'v' => 2, 35 'c' => 3, 36 'd' => 4, 37 'e' => 5, 38 'as' => 1, 39 ); 40 echo "array_count_values: <pre>"; 41 print_r(array_count_values($arr)); 42 echo "</pre><br/>"; 43 44 //对数组进行差集计算,计算出包含在$a中,而不在其他参数数组中的值,判断条件为 (string)elem1 == (string)elem2 45 $a = array(1,2,3,4); 46 $b = array(1,2); 47 echo "array_diff: <pre>"; 48 print_r(array_diff($a,$b)); 49 echo "</pre><br/>"; 50 51 //对数组进行差集计算,计算出包含在$a中,而不在其他参数数组中的值,判断条件为 (string)key1 == (string)key2,(string)values1 == (string)values2 52 $a = array("red" => 1,"black" => 2 , 1 => 2); 53 $b = array("red" => 1, "1" => "3"); 54 echo "array_diff_assoc: <pre>"; 55 print_r(array_diff_assoc($a,$b)); 56 echo "</pre><br/>"; 57 58 //对数组进行差集计算,计算出包含在$a中,而不再其他参数数组中的值，判断条件为 (string)key1 == (string)key2 59 $a = array("red" => 1,"black" => 2 , 1 => 2); 60 $b = array("red" => 1, "1" => "3"); 61 echo "array_diff_key: <pre>"; 62 print_r(array_diff_key($a, $b)); 63 echo "</pre><br/>"; 64 65 //对数组进行差集计算,计算出包含在$a中,而不在其他参数数组中的值,判断条件为 (string)key1 == (string)key2,(string)values1 == (string)values2 66 function my_array_diff_uassoc($a,$b){ 67 if($a == $b){ 68 return 0; 69 } 70 return $a > $b ? 1 : -1; 71 } 72 $a = array("red" => 1,"black" => 2 , 1 => 2); 73 $b = array("red" => 1, "1" => "2"); 74 echo "array_diff_uassoc :<pre>"; 75 print_r(array_diff_uassoc($a,$b,"my_array_diff_uassoc")); 76 echo "</pre><br/>"; 77 78 //对数组进行差集计算,计算出包含在$a中,而不再其他参数数组中的值，判断条件为 (string)key1 == (string)key2 79 function my_array_diff_ukey($a,$b){ 80 if($a == $b){ 81 return 0; 82 } 83 return $a > $b ? 1 : -1; 84 } 85 $a = array("red" => 1,"black" => 2 , 1 => 2); 86 $b = array("red" => 1); 87 $c = array("1" => "2"); 88 echo "array_diff_ukey: <pre>"; 89 print_r(array_diff_ukey($a, $b,$c,"my_array_diff_ukey")); 90 echo "</pre><br/>"; 91 92 //array_fill ,对数组给定的值 array_fill($start,$size,$value); $start => 下标开始位置,$size给定数组大小,$value => 数值 93 echo "array_fill: <pre>"; 94 print_r(array_fill(1,10,"banana")); 95 echo "</pre><br/>"; 96 97 //array_fill_keys,组合一个数组,key可以自己定义,every key => $value .... 98 echo "array_fill_keys:<pre>"; 99 $keys = array('hello',2,3,'foo'); 100 $value = array(1,2,3,4); 101 print_r(array_fill_keys($keys,'111')); 102 echo "</pre><br/>"; 103 104 //array_filter,自定义一个过滤函数,根据过滤的值得到返回参数 105 function my_array_filter($a){ 106 return $a % 2; 107 } 108 $arr = array(1,2,3,0); 109 echo "array_filter: <pre>"; 110 print_r(array_filter($arr,'my_array_filter')); 111 print_r(array_filter($arr)); 112 echo "</pre><br/>"; 113 114 //array_flip,将数组的key 和 value进行交换,3 => 5, 4 => 5会覆盖 115 $arr = array(1 => 2,3 => 5,4 => 5); 116 echo "array_flip: <pre>"; 117 print_r(array_flip($arr)); 118 echo "</pre><br/>"; 119 120 //array_intersect,返回一个包含在$a中,同时出现中其他数组中的值 121 $a = array(1,2,3,4); 122 $b = array(1); 123 $c = array(1,2,3); 124 echo "array_intersect: <pre>"; 125 print_r(array_intersect($a,$b,$c)); 126 echo "</pre><br/>"; 127 128 //array_intersect_assoc,返回一个包含在$a中,同时出现在其中数组中的值 判断条件为(string)key1 == (string)key2 , (string)value1 == (string)value2 129 $a = array(1,2,3,4); 130 $b = array(1); 131 $c = array('0' => '1',2,3); 132 echo "array_intersect_assoc: <pre>"; 133 print_r(array_intersect_assoc($a,$b,$c)); 134 echo "</pre><br/>"; 135 136 //array_intersect_key,返回一个包含在$a中同时出现在其他数组中key对应的值,(string)key1 == (string)key2 137 $a = array('a','b','c','d'); 138 $b = array(1); 139 $c = array(2); 140 echo "array_intersect_key: <pre>"; 141 print_r(array_intersect_key($a,$b,$c)); 142 echo "</pre><br/>"; 143 144 //array_intersect_uassoc 与array_intersect()不同的是,key用于回调函数,(string)value1 == (string)value2 145 $a = array('red' => 'a',"black" => 2, '333' => 2); 146 $b = array('Red' => 'a'); 147 echo "array_intersect_uassoc: <pre>"; 148 print_r(array_intersect_uassoc($a, $b, 'strcasecmp')); 149 echo "</pre><br/>"; 150 151 //array_intersect_ukey 用回调函数来比较key 152 $a = array('red' => 'a','black' => 2); 153 $b = array('RED' => 'b'); 154 echo "array_intersect_key: <pre>"; 155 print_r(array_intersect_ukey($a, $b , 'strcasecmp')); 156 echo "</pre><br/>"; 157 158 //array_keys array_keys($a,5,true),$a 只返回 keys, search_value 返回对应value的key , bool strict,是否严格 159 $a = array(2,3,4,5,5); 160 echo "array_keys: <pre>"; 161 print_r(array_keys($a,5,true)); 162 echo "</pre><br/>"; 163 164 //array_map 165 function my_array_map($a){ 166 return $a * $a * $a; 167 } 168 $a = array(2,3,4,5,5); 169 echo "array_map: <pre>"; 170 print_r(array_map('my_array_map',$a)); 171 echo "</pre><br/>"; 172 173 //array_merge 174 $a = array("0" => "red",'re' => 1); 175 $b = array("0" => "yellow","re" => 2); 176 echo "array_merge: <pre>"; 177 print_r(array_merge($a,$b)); 178 echo "</pre><br/>"; 179 180 //array_merge_recursive 181 $ar1 = array("color" => array("favorite" => "red"), 5); 182 $ar2 = array(10, "color" => array("favorite" => "green", "blue")); 183 $result = array_merge_recursive($ar1, $ar2); 184 echo "array_merge_recursive: <pre>"; 185 print_r($result); 186 echo "</pre><br/>"; 187 188 //array_multisort 对多维数组进行排序,或者多个数组排序 189 $data[] = array('volume' => 67, 'edition' => 2); 190 $data[] = array('volume' => 86, 'edition' => 1); 191 $data[] = array('volume' => 85, 'edition' => 6); 192 $data[] = array('volume' => 98, 'edition' => 2); 193 $data[] = array('volume' => 86, 'edition' => 6); 194 $data[] = array('volume' => 67, 'edition' => 7); 195 $v = array(); 196 $e = array(); 197 foreach ($data as $key => $value) { 198 $v[] = $value['volume']; 199 $e[] = $value['edition']; 200 } 201 array_multisort($v,SORT_ASC,$e,SORT_ASC,$data); 202 echo "array_multisort: <pre>"; 203 print_r($data); 204 echo "</pre><br/>"; 205 206 //array_pad 一个数组填充函数,对数组进行填充,array_pad($inputs,$size,$pad_value) ....size > 0 ,在右侧填充，size < 0 在左侧填充, abs($size) > count($inputs) 否侧不填充 207 $arr = array(2,3,4); 208 $inputs = array_pad($arr,-10,"no"); 209 echo "array_pad: <pre>"; 210 print_r($inputs); 211 echo "</pre><br/>"; 212 213 //array_pop ....出栈,长度减去1,返回出栈元素 214 $arr = array(1,2,4); 215 echo "array_pop: <pre>"; 216 print_r(array_pop($arr)); 217 echo "</pre><br/>"; 218 219 220 //array_product 计算数组中元素的乘积 221 $arr = array(1,2,3,4); 222 echo "array_product: <pre>"; 223 print_r(array_product($arr)); 224 echo "</pre><br/>"; 225 226 //array_sum 计算数组中元素的和 227 $arr = array(1,2,3,4); 228 echo "array_sum: <pre>"; 229 print_r(array_sum($arr)); 230 echo "</pre><br/>"; 231 232 //array_push 入栈,返回数组单元总数 233 $arr = array(1,2,3,4); 234 echo "array_psuh: <pre>"; 235 print_r(array_push($arr, 6,5)); 236 echo "</pre><br/>"; 237 238 //array_rand 随机抽取数组中的size个 array_rand($inputs,$size) $inputs为数组 239 $arr = array(1,2,3,4); 240 echo "array_rand: <pre>"; 241 print_r(array_rand($arr,count($arr) - 1)); 242 echo "</pre><br/>"; 243 244 //array_reduce 用回调函数迭代将数组简化成单一的值 245 $arr = array(1,2,3); 246 function get_sum($v,$m){ 247 return $v + $m; 248 } 249 echo "array_reduce: <pre>"; 250 print_r(array_reduce($arr,'get_sum')); 251 echo "</pre><br/>"; 252 253 //array_replace 函数使用后面数组元素的值替换第一个 array 数组的值。如果一个键存在于第一个数组同时也存在于第二个数组，它的值将被第二个数组中的值替换。如果一个键存在于第二个数组，但是不存在于第一个数组，则会在第一个数组中创建这个元素。如果一个键仅存在于第一个数组，它将保持不变。如果传递了多个替换数组，它们将被按顺序依次处理，后面的数组将覆盖之前的值。 254 $arr = array("orange","ping","juice","apple"); 255 $replacement = array('111' => '222'); 256 echo "array_replace: <pre>"; 257 print_r(array_replace($arr,$replacement)); 258 echo "</pre><br/>"; 259 260 //array_reverse 将数组进行翻转 261 $arr = array("1" => 2,'2' => 'red'); 262 echo "array_reverse: <pre>"; 263 print_r(array_reverse($arr)); 264 echo "</pre><br/>"; 265 266 //array_search 查找值是否在数组中 267 $arr = array('222' => '111'); 268 echo "array_search: <pre>"; 269 print_r(array_search('111',$arr,true)); 270 echo "</pre><br/>"; 271 272 //array_shift 将数组开头的单元移出数组,返回第一个元素 273 $arr = array('a',2,3); 274 echo "array_shift: <pre>"; 275 print_r(array_shift($arr)); 276 echo "</pre><br/>"; 277 278 //array_slice 从数组中提取一部分 array_slice($arr,$offset,$length[,bool $preserve_key]); 279 $inputs = array('a','b',4 => 'c','d'); 280 echo "array_slice: <pre>"; 281 print_r(array_slice($inputs,2,2,true)); 282 echo "</pre><br/>"; 283 284 //array_splice 用数组去代替原数组中的一部分 array_splice($inputs,$offsets[[,$length,],$resplacement]) 285 $input = array("red", "green", "blue", "yellow"); 286 array_splice($input, 1 , 2,'dsadsa'); 287 echo "array_splice: <pre>"; 288 print_r($input); 289 echo "</pre><br/>"; 290 291 //array_unique 当且仅当 (string)value1 == (string)value2,保留第一个值 292 $arr = array(1,2,3,'2','3'); 293 echo "array_unique: <pre>"; 294 var_dump(array_unique($arr)); 295 echo "</pre><br/>"; 296 297 //array_shift 在数组头加入一个或者多个单元 298 $arr = array(2,3,4); 299 $add = array(5,6); 300 array_unshift($arr, $add); 301 echo "array_unshift: <pre>"; 302 print_r($arr); 303 echo "</pre><br/>"; 304 305 //array_walk 对数组中的每个成员应用用户函数 306 function my_array_walk(&$v,$k,$str){ 307 $v = $v . $k . $str; 308 } 309 $arr = array('red','black','blue','green'); 310 echo "array_walk: <pre>"; 311 array_walk($arr,'my_array_walk','sss'); 312 print_r($arr); 313 echo "</pre><br/>"; 314 315 //array_walk_recursive 对数组中的每个成员应用用户函数 316 function my_array_walk_recursive($v,$k){ 317 echo "$k holds $v<br/>"; 318 } 319 $arr = array('red' => 1,'black' => 2); 320 $bigarr = array('haha' => $arr,'pink' => 3); 321 array_walk_recursive($bigarr, 'my_array_walk_recursive'); 322 323 ?>
自己练习而已，不喜勿喷。