PHP implementation extracts non repeated integers (programming topics can be the fastest familiar functions)

php Realization Extract non duplicate integers （ Programming topics can be the fastest to become familiar with functions ）

One 、 summary

One sentence summary ： Programming topics can be the fastest to become familiar with functions .

1、 String inversion function ？

No, str_revserse, Yes arr_reverse, Here is strrev

3 $num=strrev($num);

Copy

2、 String splitting function （ By fixed character ）？

str_split()

4 $arr=str_split($num,1);

Copy

3、 Array to string function ？

implode()

6 $ans=implode($arr);

Copy

Two 、 Extract non duplicate integers

Title Description

Enter a int Type integer , Read right to left , Returns a new integer with no repeating numbers .

Input description :

Enter a int Type integer

Output description :

Read right to left , Returns a new integer with no repeating numbers

Example 1

Input

Copy

9876673

Copy

Output

Copy

37689

Copy

2、 Code

1 <?php
2 $num=trim(fgets(STDIN));
3 $num=strrev($num);
4 $arr=str_split($num,1);
5 $arr=array_unique($arr);
6 $ans=implode($arr);
7 echo $ans;
8 ?>

Copy

Publisher ： Full stack programmer stack length , Reprint please indicate the source ：https://javaforall.cn/101599.html Link to the original text ：https://javaforall.cn