range()

(PHP 4, PHP 5, PHP 7)

根据范围创建数组，包含指定的元素

说明

建立一个包含指定范围单元的数组。

参数

序列的第一个值。

序列结束于$end的值。

如果设置了步长$step，会被作为单元之间的步进值。$step应该为正值。不设置$step则默认为 1。

返回值

返回的数组中从$start到$end（含 start 和 end）的单元。

范例

Example #1range()例子

注释

字符序列值仅限单个字符。如果长度大于1，仅仅使用第一个字符。

参见

• shuffle() 打乱数组
• array_fill() 用给定的值填充数组
• foreach

To create a range array like
Array
(
  [11] => 1
  [12] => 2
  [13] => 3
  [14] => 4
)
combine two range arrays using array_combine:
array_combine(range(11,14),range(1,4))

So with the introduction of single-character ranges to the range() function, the internal function tries to be "smart", and (I am inferring from behavior here) apparently checks the type of the incoming values. If one is numeric, including numeric string, then the other is treated as numeric; if it is a non-numeric string, it is treated as zero. 
But.
If you pass in a numeric string in such a way that is is forced to be recognized as type string and not type numeric, range() will function quite differently.
Compare:
=
I wouldn't call this a bug, because IMO it is even more useful than the stock usage of the function.

foreach(range()) whilst efficiant in other languages, such as python, it is not (compared to a for) in php*.
php is a C-inspired language and thus for is entirely in-keeping with the lanuage aethetic to use it

That the officiant documentation doesnt mention the for loop is strange.
Note however, that in PHP5 foreach is faster than for when iterating without incrementing a variable.
* My tests using microtime and 100 000 iterations consistently (~10 times) show that for is 4x faster than foreach(range()).

I needed a function, that creates a letter range with arbitrary length.
You specify via the $length parameter, how many entries you need.
Logic is analog to the logic of the column-titles in a calc-sheet. 

So, I needed a quick and dirty way to create a dropdown select for hours, minutes and seconds using 2 digit formatting, and to create those arrays of data, I combined range with array merge..

Super simple.

The function will generate an array of integers even if your numerical parameters are enclosed in quotes.

An easy way to get an array of strings is to map strval() to the range: 

if you need zero padding, string prefixes or any other masks, then a simple combination of array_map, inline functions and sprintf is your friend.

Will result:
Array
(
  [0] => sample_050
  [1] => sample_051
  [2] => sample_052
  [3] => sample_053
  [4] => sample_054
  [5] => sample_055
  [6] => sample_056
  [7] => sample_057
  [8] => sample_058
  [9] => sample_059
)

The function "range" is very useful to get an array of characters as range('C','R') does.
At work, I had to extend the function range($a,$b) to work in this special case: with two uppercase strings $a and $b, it should return all the possible strings between $a and $b.
This could be used for example to get the excel column indexes.
e.g. 
So I wrote the function getrange($min,$max) that exactly does this. 

You might expect range($n, $n-1) to be an empty array (as in e.g. Python) but actually PHP will assume a step of -1 if start is larger than end.

This is a modified version of thomas' range_string() function. It's simpler, cleaner, and more robust, but it lacks the advanced features his function had, hopefully it will be of assitance to someone.
Examples:
  input: "1, 2, 3, 4, 5, 6" --> output: 1, 2, 3, 4, 5, 6
  input: "1-6" --> output: 1, 2, 3, 4, 5, 6
  input: "1-6" --> output: 1, 2, 3, 4, 5, 6
  input: "1 - -6" --> output: 1, 2, 3, 4, 5, 6
  input: "0 - 0" --> output: 0
  input: "1, 4-6, 2" --> output: 1, 2, 4, 5, 6
  input: "6,3-1" --> output: 1, 2, 3, 6 

Quick HTML menus with minimum and maximum sets of years:


  
    
Usage: 

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