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】

php  /  管理员 发布于 7年前   343

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   [b] => 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( [b] => 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bluered*/

array_shift

功能：移除开头的元素，与array_pop相反

";print_r($fruit);/**结果milkArray ( [0] => 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 [b] => green [1] => blue [c] => red )*/

array_slice

功能：从数组中取出部分元素

";$output = array_slice($input,-2,1);//第二个参数是正数时，表示个数；倒数第一个是-1，倒数第二个是-2print_r($output);echo "
";$output = array_slice($input,0,3);print_r($output);echo "
";$output = array_slice($input,2,-1);//第二个参数是负数时，表示位置，取到哪一位，不包括本身print_r($output);echo "
";$output = array_slice($input,2,-1,true);//第三个参数为true时，保留原有的键值print_r($output);echo "
";/**结果Array ( [0] => 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

";$input = array("a","b","c","d","e");$count = count($input);echo $count;/**结果45*/

current

功能:获取当前的指针指向元素

";next($array);//使指针指向下一个元素$result = current($array);echo $result."
";prev($array);//使指针指向前一个元素$result = current($array);echo $result."
";end($array);//使指针指向最后一个元素$result = current($array);echo $result."
";/**结果footbikefootplane*/

in_array

功能：检验某值是否存在数组中，有返回True，没有返回False

";if(in_array("mac",$os_list)){ echo "当前操作系统列表中存在mac";}else{ echo "当前操作系统列表中不存在mac";}echo "
";/**结果当前操作系统列表中存在Irix当前操作系统列表中不存在mac*/

list

功能：将数组中的信息赋值给多个变量

";list($flag,,$grassland) = $info;echo "$flag,$grassland";echo "
";list(,,$grassland) = $info;echo "$grassland";echo "
";/**结果red,blue,greenred,greengreen*/

shuffle

功能：打乱数组

";shuffle($numbers);//打乱数组print_r($numbers);/**结果Array ( [0] => 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 = orangea = lemonc = bananad = 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 = orangea = lemonc = bananad = appled = applec = bananaa = lemonb = 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 = applec = bananab = orangea = 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 = lemonb = orangec = bananad = 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 = orange1 = lemon2 = banana3 = 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 = apple1 = banana2 = lemon3 = 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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