《PHP实例:PHP中Array相关函数简介》要点:
本文介绍了PHP实例:PHP中Array相关函数简介,希望对您有用。如果有疑问,可以联系我们。
使用函数array_keys(),得到数组中所有的键,参数:数组PHP实战
- $arr=array();
- $arr['one']="one";
- $arr['two']="two";
- $arr['three']="three";
- $newArr=array_keys($arr);
- print_r($newArr);
- //Array ( [0] => one [1] => two [2] => three )
使用函数array_values(),得到数组中所有的值,参数:数组PHP实战
- $arr=array();
- $arr[20]="one";
- $arr[30]="two";
- $arr[40]="three";
- $newArr=array_values($arr);
- print_r($newArr);
- //Array ( [0] => one [1] => two [2] => three )
使用函数array_map(),使每个元素都调用一下自定义函数,参数:String类型函数名称,数组PHP实战
- $arr=array();
- $arr[0]="one";
- $arr[1]="two";
- $arr[2]="three";
- function test($v){
- return $v." Hello";
- }
- $newArr=array_map("test",$arr);
- print_r($newArr);
- //Array ( [0] => one Hello [1] => two Hello [2] => three Hello )
使用函数array_merge(),把两个数组合并成一个,参数:数组,数组PHP实战
关联数组合并时,键相同的会被后面的数组覆盖PHP实战
索引数组合并时,会连接在一起形成一个新的数组PHP实战
- $arr=array();
- $arr[0]="one";
- $arr[1]="two";
- $arr[2]="three";
- $arr1=array();
- $arr[3]="taoshihan1";
- $arr[4]="taoshihan2";
- $arr[5]="taoshihan3";
- $newArr=array_merge($arr,$arr1);
- print_r($newArr);
- //Array ( [0] => one [1] => two [2] => three [3] => taoshihan1 [4] => taoshihan2 [5] => taoshihan3 )
- $arr=array("one","two","three");
- $arr1=array("4","5","6");
- $newArr=array_merge($arr,$arr1);
- print_r($newArr);
- //Array ( [0] => one [1] => two [2] => three [3] => 4 [4] => 5 [5] => 6 )
使用函数ksort(),按照键名进行排序,注意没有返回新的数组,还是原来的数组PHP实战
- $arr=array("2"=>"taoshihan2","1"=>"taoshihan1","3"=>"taoshihan3");
- ksort($arr);
- print_r($arr);
- //Array ( [1] => taoshihan1 [2] => taoshihan2 [3] => taoshihan3 )
使用函数array_search(),搜索某个键值,返回对应的键PHP实战
- $arr=array("2"=>"taoshihan2","1"=>"taoshihan1","3"=>"taoshihan3");
- echo array_search("taoshihan1",$arr);
- // 1
PHP实战
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