These functions allow you to interact with and manipulate
arrays in various ways. Arrays are essential for storing,
managing, and operating on sets of variables.
Simple and multi_dimensional arrays are supported, and may be
either user created or created by another function.
There are specific database handling functions for populating
arrays from database queries, and several functions return arrays.
Please see the Arrays
section of the manual for a detailed explanation of how arrays are
implemented and used in PHP.
See also Array operators
for other ways how to manipulate the arrays.
No external libraries are needed to build this extension.
There is no installation needed to use these
functions; they are part of the PHP core.
This extension has no configuration directives defined in php.ini.
This extension has no resource types defined.
The constants below are always available as part of the PHP core.
Sorting order flags:
Sorting type flags: used by various sort functions
SORT_REGULAR is used to compare items normally.
SORT_NUMERIC is used to compare items numerically.
SORT_STRING is used to compare items as strings.
SORT_LOCALE_STRING is used to compare items as
strings, based on the current locale. Added in PHP 4.4.0 and 5.0.2.