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。
时间： 2024-08-10 15:05:11