ARRAY IN PHP
For example :
if you can speak following language :
<?php
$language = array("English", "French", "Chinese");
echo "I can speak " . $language[0] . ", " . $language[1] . " and " . $language[2] . ".";
?>
Output :
I can speak English, French, Chinese.
Types Of Array :
There are following types of array in PHP :
- Indexed Array means an Arrays with sequential numeric index, such as 0,1,2,3,4 etc.
Example:
$one = array();
$one[0] = "test 1";
$one[1] = "test 2";
$one[3] = "test 3";
Associative Array:
- This type of array is widely used in PHP programming whose elements are defined in key/value pair.
Example:
$one = array();
$one["key1"] = "value 1";
$one["key2"] = "value 2";
$one["key3"] = "value 3";
$one["key4"] = "value 4";
Multidimensional Array:
- Arrays whose elements may contains one or more arrays. There is no limit in the level of dimensions.
Example:
$one = array();
$one[0] = array("data01","data02","data03");
$one[1] = array("data11","data12","data13");
- As you know php variables are used to store value and you also know that in one variable you can store only one value at a time.
- but whenever you need to store more than one value in a single variable the answer is Array
- So, An Array is used to store multiple values or more than one value in a single variable
- In short an array is a variable which can store more than one value at a time.
For example :
if you can speak following language :
- English
- French
- Chinese
<?php
$language = array("English", "French", "Chinese");
echo "I can speak " . $language[0] . ", " . $language[1] . " and " . $language[2] . ".";
?>
Output :
I can speak English, French, Chinese.
There are following types of array in PHP :
- Indexed arrays
- Associative arrays
- Multidimensional arrays
- Indexed Array means an Arrays with sequential numeric index, such as 0,1,2,3,4 etc.
Example:
$one = array();
$one[0] = "test 1";
$one[1] = "test 2";
$one[3] = "test 3";
Associative Array:
- This type of array is widely used in PHP programming whose elements are defined in key/value pair.
Example:
$one = array();
$one["key1"] = "value 1";
$one["key2"] = "value 2";
$one["key3"] = "value 3";
$one["key4"] = "value 4";
Multidimensional Array:
- Arrays whose elements may contains one or more arrays. There is no limit in the level of dimensions.
Example:
$one = array();
$one[0] = array("data01","data02","data03");
$one[1] = array("data11","data12","data13");
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Function
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Description
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array()
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Creates an array
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array_change_key_case()
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Changes all keys in an array to
lowercase or uppercase
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array_chunk()
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Splits an array into chunks of
arrays
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array_column()
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Returns the values from a single
column in the input array
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array_combine()
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Creates an array by using the
elements from one "keys" array and one "values" array
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array_count_values()
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Counts all the values of an array
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array_diff()
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Compare arrays, and returns the
differences (compare values only)
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array_diff_assoc()
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Compare arrays, and returns the
differences (compare keys and values)
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array_diff_key()
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Compare arrays, and returns the
differences (compare keys only)
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array_diff_uassoc()
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Compare arrays, and returns the
differences (compare keys and values, using a user-defined key comparison
function)
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array_diff_ukey()
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Compare arrays, and returns the
differences (compare keys only, using a user-defined key comparison function)
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array_fill()
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Fills an array with values
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array_fill_keys()
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Fills an array with values,
specifying keys
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array_filter()
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Filters the values of an array
using a callback function
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array_flip()
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Flips/Exchanges all keys with
their associated values in an array
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array_intersect()
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Compare arrays, and returns the
matches (compare values only)
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array_intersect_assoc()
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Compare arrays and returns the
matches (compare keys and values)
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array_intersect_key()
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Compare arrays, and returns the
matches (compare keys only)
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array_intersect_uassoc()
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Compare arrays, and returns the
matches (compare keys and values, using a user-defined key comparison
function)
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array_intersect_ukey()
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Compare arrays, and returns the
matches (compare keys only, using a user-defined key comparison function)
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array_key_exists()
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Checks if the specified key exists
in the array
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array_keys()
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Returns all the keys of an array
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array_map()
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Sends each value of an array to a
user-made function, which returns new values
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array_merge()
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Merges one or more arrays into one
array
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array_merge_recursive()
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Merges one or more arrays into one
array recursively
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array_multisort()
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Sorts multiple or
multi-dimensional arrays
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array_pad()
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Inserts a specified number of
items, with a specified value, to an array
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array_pop()
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Deletes the last element of an
array
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array_product()
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Calculates the product of the
values in an array
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array_push()
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Inserts one or more elements to
the end of an array
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array_rand()
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Returns one or more random keys
from an array
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array_reduce()
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Returns an array as a string,
using a user-defined function
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array_replace()
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Replaces the values of the first
array with the values from following arrays
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array_replace_recursive()
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Replaces the values of the first
array with the values from following arrays recursively
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array_reverse()
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Returns an array in the reverse
order
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array_search()
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Searches an array for a given
value and returns the key
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array_shift()
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Removes the first element from an
array, and returns the value of the removed element
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array_slice()
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Returns selected parts of an array
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array_splice()
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Removes and replaces specified
elements of an array
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array_sum()
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Returns the sum of the values in
an array
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array_udiff()
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Compare arrays, and returns the
differences (compare values only, using a user-defined key comparison
function)
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array_udiff_assoc()
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Compare arrays, and returns the
differences (compare keys and values, using a built-in function to compare
the keys and a user-defined function to compare the values)
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array_udiff_uassoc()
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Compare arrays, and returns the
differences (compare keys and values, using two user-defined key comparison
functions)
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array_uintersect()
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Compare arrays, and returns the matches
(compare values only, using a user-defined key comparison function)
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array_uintersect_assoc()
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Compare arrays, and returns the
matches (compare keys and values, using a built-in function to compare the
keys and a user-defined function to compare the values)
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array_uintersect_uassoc()
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Compare arrays, and returns the
matches (compare keys and values, using two user-defined key comparison
functions)
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array_unique()
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Removes duplicate values from an
array
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array_unshift()
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Adds one or more elements to the
beginning of an array
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array_values()
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Returns all the values of an array
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array_walk()
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Applies a user function to every
member of an array
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array_walk_recursive()
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Applies a user function
recursively to every member of an array
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arsort()
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Sorts an associative array in
descending order, according to the value
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asort()
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Sorts an associative array in
ascending order, according to the value
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compact()
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Create array containing variables
and their values
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count()
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Returns the number of elements in
an array
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current()
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Returns the current element in an
array
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each()
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Returns the current key and value
pair from an array
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end()
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Sets the internal pointer of an
array to its last element
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extract()
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Imports variables into the current
symbol table from an array
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in_array()
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Checks if a specified value exists
in an array
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key()
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Fetches a key from an array
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krsort()
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Sorts an associative array in
descending order, according to the key
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ksort()
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Sorts an associative array in
ascending order, according to the key
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list()
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Assigns variables as if they were
an array
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natcasesort()
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Sorts an array using a case
insensitive "natural order" algorithm
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natsort()
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Sorts an array using a
"natural order" algorithm
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next()
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Advance the internal array pointer
of an array
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pos()
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Alias of current()
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prev()
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Rewinds the internal array pointer
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range()
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Creates an array containing a
range of elements
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reset()
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Sets the internal pointer of an
array to its first element
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rsort()
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Sorts an indexed array in
descending order
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shuffle()
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Shuffles an array
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sizeof()
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Alias of count()
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sort()
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Sorts an indexed array in
ascending order
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uasort()
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Sorts an array by values using a
user-defined comparison function
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uksort()
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Sorts an array by keys using a
user-defined comparison function
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usort()
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Sorts an array using a
user-defined comparison function
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