php常用数组array函数实例总结【赋值,拆分,合并,计算,添加,删除,查询,判断,排序】

            本文实例总结了php常用数组array函数。分享给大家供大家参考，具体如下：
array_combine
功能：用一个数组的值作为新数组的键名，另一个数组的值作为新数组的值
案例：
一 [two] => 二 [three] => 三 )
*/
array_chunk
功能：拆分数组成多个数组
"apple","b"=>"blue","c","d","e");
echo "";
print_r(array_chunk($input_array, 2));
print_r(array_chunk($input_array, 2,True));
echo "";
/**结果
Array
(
[0] => Array
  (
   [0] => apple
   [1] => blue
  )
[1] => Array
  (
   [0] => c
   [1] => d
  )
[2] => Array
  (
   [0] => e
  )
)
Array
(
[0] => Array
  (
   [a] => apple
    => blue
  )
[1] => Array
  (
   [0] => c
   [1] => d
  )
[2] => Array
  (
   [2] => e
  )
)
*/
array_count_values
功能：统计数组中值出现的次数
"apple","b"=>"blue","c","d","e");
echo "";
print_r(array_count_values($input_array));
echo "";
/**结果
Array
(
[apple] => 1
[blue] => 1
[c] => 1
[d] => 1
[e] => 1
)
*/
array_diff
功能：第一个数组中去掉第二个数组中有的数据，返回剩下的内容作为结果
"apple","b"=>"blue","c","d","e");
$array2 = array("apple","c","d","f");
$result = array_diff($array1, $array2);
$result2 = array_diff($array2, $array1);
echo "";
print_r($result);//数组1中去掉数组2中剩下的
print_r($result2);//数组2中去掉数组1中剩下的
echo "";
/**结果
Array
(
=> blue
[2] => e
)
Array
(
[3] => f
)
*/
array_map
功能：将回调函数执行到数组中
";
print_r($b);
echo "";
/**结果
Array
(
[0] => 1
[1] => 8
[2] => 27
[3] => 64
[4] => 125
)
*/
array_merge
功能：合并一个或多个数组
说明：如果后面有键名相同的会覆盖掉前面的内容，键名为数字的会添加到后面
"red",2,4);
$array2 = array("a","b","color"=>"green","shape"=>"trapezoid",4);
$result1 = array_merge($array1,$array2);
$result2 = array_merge_recursive($array1,$array2);
echo "";
print_r($result1);
print_r($result2);
echo "";
/**结果
Array
(
[color] => green
[0] => 2
[1] => 4
[2] => a
[3] => b
[shape] => trapezoid
[4] => 4
)
Array
(
[color] => Array
  (
   [0] => red
   [1] => green
  )
[0] => 2
[1] => 4
[2] => a
[3] => b
[shape] => trapezoid
[4] => 4
)
*/
array_pop
功能：剔除数组最后一个元素，返回被剔除的元素内容
";
print_r($stack);
print_r($last);
echo "";
/**结果
Array
(
[0] => orange
[1] => banana
[2] => apple
)
1
*/
array_push
功能：将一个多个单元压入数组末尾，返回之后的数组个数
";
print_r($stack);
print_r($count);
echo "";
/**结果
Array
(
[0] => orange
[1] => banana
[2] => apple
[3] => red
[4] => blue
)
5
*/
array_rand
功能：获取随机的键名
1
[1] => 4
)
Array
(
[0] => 0
[1] => 1
[2] => 3
)
*/
array_search
功能：查询数组中的内容，返回键值，如果有多个匹配，返回第一个匹配的内容
"b","red"=>"r","green","r");
$key = array_search('b', $array);
echo $key;
echo "
";
$key = array_search('r', $array);
echo $key;
echo "
";
/**结果
blue
red
*/
array_shift
功能：移除开头的元素，与array_pop相反
orange [1] => banana [2] => apple )
*/
array_unique
功能：去除数组重复的元素，保留第一个出现的，包括键名和值
"green","red","b"=>"green","blue","c"=>"red");
$result = array_unique($input);
print_r($result);
echo "
";
print_r($input);
/**结果
Array ( [a] => green [0] => red [1] => blue )
Array ( [a] => green [0] => red => green [1] => blue [c] => red )
*/
array_slice
功能：从数组中取出部分元素
c [1] => d [2] => e )
Array ( [0] => d )
Array ( [0] => a [1] => b [2] => c )
Array ( [0] => c [1] => d )
Array ( [2] => c [3] => d )
*/
count
功能：返回数组元素个数，元素为数组的算一个
current
功能:获取当前的指针指向元素
in_array
功能：检验某值是否存在数组中，有返回True，没有返回False
list
功能：将数组中的信息赋值给多个变量
shuffle
功能：打乱数组
1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )
Array ( [0] => 4 [1] => 1 [2] => 5 [3] => 2 [4] => 3 )
*/
array_keys
功能：获取数组的键名，第二个参数可以指定获取某个元素
100,"color"=>"red");
print_r(array_keys($array));
echo "
";
$array = array("blue","red","green","blue","blue");
print_r(array_keys($array,"blue"));
echo "
";
$array = array("color"=>array("blue","red","green"),"size"=>array("small","medium","large"));
print_r(array_keys($array));
echo "
";
/**结果
Array ( [0] => 0 [1] => color )
Array ( [0] => 0 [1] => 3 [2] => 4 )
Array ( [0] => color [1] => size )
*/
array_reverse
功能：获取数组的反向
Array
  (
   [0] => green
   [1] => red
  )
[1] => 3
[2] => php
)
Array
(
[2] => Array
  (
   [0] => green
   [1] => red
  )
[1] => 3
[0] => php
)
*/
arsort
功能：逆向排序，索引不变
"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
arsort($fruits);//按照字符逆向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
";
}
/**结果
b = orange
a = lemon
c = banana
d = apple
*/
asort
功能：进行正向排序
"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
arsort($fruits);//按照字符逆向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
";
}
echo "";
asort($fruits);//按照字符正向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
";
}
/**结果
b = orange
a = lemon
c = banana
d = apple
d = apple
c = banana
a = lemon
b = orange
*/
krsort
功能：按照键名进行逆向排序
"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
krsort($fruits);//按照键名逆向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
";
}
/**结果
d = apple
c = banana
b = orange
a = lemon
*/
ksort
功能：按照键名进行正向排序
"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
ksort($fruits);//按照键名正向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
";
}
/**结果
a = lemon
b = orange
c = banana
d = apple
*/
rsort
功能：按照值进行逆向排序，键名改变
"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
rsort($fruits);//按照值进行逆向排序或数字，键名改变
foreach($fruits as $key=>$val){
echo "$key = $val
";
}
/**结果
0 = orange
1 = lemon
2 = banana
3 = apple
*/
sort
功能：按照值进行正向排序，键名改变
"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
sort($fruits);//按照值进行逆向排序或数字，键名改变
foreach($fruits as $key=>$val){
echo "$key = $val
";
}
/**结果
0 = apple
1 = banana
2 = lemon
3 = orange
*/
更多关于PHP相关内容感兴趣的读者可查看本站专题：《PHP数组(Array)操作技巧大全》、《php字符串(string)用法总结》、《php常用函数与技巧总结》、《PHP错误与异常处理方法总结》、《PHP基本语法入门教程》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
希望本文所述对大家PHP程序设计有所帮助。
            
            
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