PHP - 使用字符串值作为数字对数组进行排序

Question

I have an array with these values:

1...
2...
3...
...
9. Built-in Functions
  9.1. String
  9.2. Arithmetic
  9.3. Variable
  9.4. Array
  9.5. Date & Time
  9.6. Object
  9.7. Database
  9.8. Session
  9.9. Directory
  9.10. Other

And I want them to be displayed in this order (like numeric).

But, sorting it with sort() or asort(), using both SORT_NUMERIC and SORT_STRING flags, I get the same result:

1...
2...
3...
...
9. Built-in Functions
  9.1. String
  9.10. Other
  9.2. Arithmetic
  9.3. Variable
  9.4. Array
  9.5. Date & Time
  9.6. Object
  9.7. Database
  9.8. Session
  9.9. Directory

*see the 9.10

And using the SORT_NATURAL the parent items are placed AFTER the children:

1...
2...
3...
...
  9.1. String
  9.2. Arithmetic
  9.3. Variable
  9.4. Array
  9.5. Date & Time
  9.6. Object
  9.7. Database
  9.8. Session
  9.9. Directory
  9.10. Other
9. Built-in Functions

How could I get the proper sorting?

*edited to include the parent items properly

Answer 1

You can Create your own Sorting with the "usort" function http://php.net/manual/en/function.usort.php