本文实例讲述了PHP数组array类常见操作，分享给大家供大家参考，具体如下：

array_merge($arr1,$arr2....);//合并一个或多个数组，例：

1. <?php
2. $beginning = 'foo';
3. $end = array(1 => 'bar');
4. $result = array_merge((array)$beginning, (array)$end);
5. print_r($result);
6. ?>

以上例程会输出：

1. Array
2. (
3. [0] => foo
4. [1] => bar
5. )

2、示例：

1. <?php
2. $array1 = array("color" => "red", 2, 4);
3. $array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
4. $result = array_merge($array1, $array2);
5. print_r($result);
6. ?>

以上例程会输出：

1. Array
2. (
3. [color] => green
4. [0] => 2
5. [1] => 4
6. [2] => a
7. [3] => b
8. [shape] => trapezoid
9. [4] => 4
10. )

3、示例：

1. <?php
2. $array1 = array();
3. $array2 = array(1 => "data");
4. $result = array_merge($array1, $array2);
5. ?>

别忘了数字键名将会被重新编号！

1. Array
2. (
3. [0] => data
4. )

4、示例：

1. <?php
2. $array1 = array(0 => 'zero_a', 2 => 'two_a', 3 => 'three_a');
3. $array2 = array(1 => 'one_b', 3 => 'three_b', 4 => 'four_b');
4. $result = $array1 + $array2;
5. var_dump($result);
6. ?>

运行结果：

1. array(5) {
2. [0]=>
3. string(6) "zero_a"
4. [2]=>
5. string(5) "two_a"
6. [3]=>
7. string(7) "three_a"
8. [1]=>
9. string(5) "one_b"
10. [4]=>
11. string(6) "four_b"
12. }

array_diff($arr1,$arr2);//计算数组的差集（对比返回在 array1 中但是不在 array2 及任何其它参数数组中的值。）

例：

1. <?php
2. $array1 = array("a" => "green", "red", "blue", "red");
3. $array2 = array("b" => "green", "yellow", "red");
4. $result = array_diff($array1, $array2);
5. print_r($result);
6. ?>

在 $array1 中多次出现的值一样处理，输出结果为：

1. Array
2. (
3. [1] => blue
4. )

array_diff_assoc（$arr1,$arr2...）；//带索引检查计算数组的差集

array_diff_assoc() 返回一个数组，该数组包括了所有在 array1 中但是不在任何其它参数数组中的值

1. <?php
2. $array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
3. $array2 = array("a" => "green", "yellow", "red");
4. $result = array_diff_assoc($array1, $array2);
5. print_r($result);
6. ?>

以上例程会输出：

1. Array
2. (
3. [b] => brown
4. [c] => blue
5. [0] => red
6. )

array_keys($array);//返回数组中部分的或所有的键名(返回 input 数组中的数字或者字符串的键名。)

1. <?php
2. $array = array(0 => 100, "color" => "red");
3. print_r(array_keys($array));
4. $array = array("blue", "red", "green", "blue", "blue");
5. print_r(array_keys($array, "blue"));
6. $array = array("color" => array("blue", "red", "green"),
7. "size" => array("small", "medium", "large"));
8. print_r(array_keys($array));
9. ?>

以上例程会输出：

1. Array
2. (
3. [0] => 0
4. [1] => color
5. )
6. Array
7. (
8. [0] => 0
9. [1] => 3
10. [2] => 4
11. )
12. Array
13. (
14. [0] => color
15. [1] => size
16. )

array_slice($array, $offset, $length);//从数组中取出一段

参数：array::输入的数组， offset：序列偏移量， length:单元长度

1. $input = array("a", "b", "c", "d", "e");
2. $output = array_slice($input, 2); // returns "c", "d", and "e"
3. $output = array_slice($input, -2, 1); // returns "d"
4. $output = array_slice($input, 0, 3); // returns "a", "b", and "c"