PHP Learning Notes-arrays (13)

Krsort (array, type);

Role:

To sort the parameters of an array in descending order

Parameters:

Array: Arrays

Type: optional specifies how the elements/items of the array are arranged. Possible values:

• 0 = sort_regular-default. Arrange each item in the usual order (standard ASCII, without changing the type).

• 1 = sort_numeric-Each item is treated as a number.

• 2 = sort_string-Each item is treated as a string.

• 3 = sort_locale_string-handles each item as a string, based on the current locale (can be changed by setlocale ()).

• 4 = sort_natural-handles each item as a string, using a natural sort similar to Natsort ().

• 5 = sort_flag_case-You can sort strings by combining (bitwise OR) sort_string or sort_natural, not case-sensitive.

return value:

Success returns TRUE, Failure returns false

Example: descending order of key for an array

$a = Array (' 1 ' = ' red ', ' 5 ' = ' Blue ', ' 3 ' = ' 12 '); Krsort ($a);  Print_r ($a); Output: Array ([5] = blue [3] = [1] = + red)

Ksort (array, type);

Role:

Sort the key of an array in ascending order

Parameters:

Array: Arrays

Type: Optional. Specifies how to arrange the elements/items of an array. Possible values:

• 0 = sort_regular-default. Arrange each item in the usual order (standard ASCII, without changing the type).

• 1 = sort_numeric-Each item is treated as a number.

• 2 = sort_string-Each item is treated as a string.

• 3 = sort_locale_string-handles each item as a string, based on the current locale (can be changed by setlocale ()).

• 4 = sort_natural-handles each item as a string, using a natural sort similar to Natsort ().

• 5 = sort_flag_case-You can sort strings by combining (bitwise OR) sort_string or sort_natural, not case-sensitive.

return value:

Success returns TRUE, Failure returns false

Example: Sorting an array key in ascending order

$a = Array (' 1 ' = ' red ', ' 5 ' = ' Blue ', ' 3 ' = ' 12 '); Ksort ($a);  Print_r ($a); Output: Array ([1] = red [3] = [5] = = blue)

List (var1, var2, var3 ...)

Role:

Assigning an element in an array to a variable in a list

Parameters:

VAR1: Variable Name

VAR2: Variable Name

VAR3: Variable Name

return value:

Returns the array after assignment

Example:

$a = Array (' a ' = = ' red ', ' b ' = ' blue ', ' c ' = ' 12 ');  $res = List ($b, $c, $d) = $a;   Print_r ($res); Output: Array ([a] = red [b] = blue [C] + 12)

Natcasesort (Array)

Role:

Use natural sort arrays for case-insensitive bleed

Parameters:

Array: Arrays

return value:

Successful return true, failed to Shanghai false

Example:

$a = Array (' a ' = = ' red ', ' b ' = ' blue ', ' c ' = ' purple '); Natcasesort ($a);  Print_r ($a); Output: Array ([b] = blue [c] = purple [A] = red)

Natsort (Array)

Role:

Sort an array using natural sort

Parameters:

Array: Arrays

return value:

Successful return true, failed to Shanghai false

Example

$a = Array (' a ' = = ' red ', ' b ' = ' blue ', ' c ' = ' purple '); Natsort ($a);  Print_r ($a); Output: Array ([b] = blue [c] = purple [A] = red)

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PHP Learning Notes-arrays (13)