Posted: Thu Oct 11, 2007 12:24 pm
Guys, no need to quote functions references from a web sites. Would be more than enough to post a link to that page 
array_uintersect
(PHP 5)
array_uintersect — Computes the intersection of arrays, compares data by a callback function
Description
array array_uintersect ( array $array1, array $array2 [, array $ ..., callback $data_compare_func] )
array_uintersect() returns an array containing all the values of array1 that are present in all the arguments. The data is compared by using a callback function.
Example
[PHP]<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");
print_r(array_uintersect($array1, $array2, "strcasecmp"));
?> [/PHP]
The above example will output:
Code: Select all
Array
(
[a] => green
[b] => brown
[0] => red
)For comparison is used the user supplied callback function. It must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.
See also
Code: Select all
array_intersect(), array_uintersect_assoc(), array_intersect_uassoc() and array_uintersect_uassoc(). --------------------------------------------------------------------------
array_unique
(PHP 4 >= 4.0.1, PHP 5)
array_unique — Removes duplicate values from an array
Description
array array_unique ( array $array )
array_unique() takes input array and returns a new array without duplicate values.
Note that keys are preserved. array_unique() sorts the values treated as string at first, then will keep the first key encountered for every value, and ignore all following keys. It does not mean that the key of the first related value from the unsorted array will be kept.
Note: Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In words: when the string representation is the same.
The first element will be used.
Example
[PHP]<?php
$input = array("a" => "green", "red", "b" => "green", "blue", "red");
$result = array_unique($input);
print_r($result);
?> [/PHP]
The above example will output:
Code: Select all
Array
(
[a] => green
[0] => red
[1] => blue
) Example
[PHP]<?php
$input = array(4, "4", "3", 4, 3, "3");
$result = array_unique($input);
var_dump($result);
?> [/PHP]
The above example will output:
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array(2) {
[0] => int(4)
[2] => string(1) "3"
} --------------------------------------------------------------------------
array_unshift
(PHP 4, PHP 5)
array_unshift — Prepend one or more elements to the beginning of an array
Description
int array_unshift ( array &$array, mixed $var [, mixed $...] )
array_unshift() prepends passed elements to the front of the array. Note that the list of elements is prepended as a whole, so that the prepended elements stay in the same order. All numerical array keys will be modified to start counting from zero while literal keys won't be touched.
Returns the new number of elements in the array.
Example
[PHP]<?php
$queue = array("orange", "banana");
array_unshift($queue, "apple", "raspberry");
print_r($queue);
?> [/PHP]
The above example will output:
Code: Select all
Array
(
[0] => apple
[1] => raspberry
[2] => orange
[3] => banana
) See also
Code: Select all
array_shift(), array_push(), and array_pop(). --------------------------------------------------------------------------
array_values
(PHP 4, PHP 5)
array_values — Return all the values of an array
Description
array array_values ( array $input )
array_values() returns all the values from the input array and indexes numerically the array.
Example
[PHP]<?php
$array = array("size" => "XL", "color" => "gold");
print_r(array_values($array));
?>[/PHP]
The above example will output:
Code: Select all
Array
(
[0] => XL
[1] => gold
) See also
Code: Select all
array_keys().--------------------------------------------------------------------------
array_walk_recursive
(PHP 5)
array_walk_recursive — Apply a user function recursively to every member of an array
Description
bool array_walk_recursive ( array &$input, callback $funcname [, mixed $userdata] )
Applies the user-defined function funcname to each element of the input array. This function will recur into deeper arrays. Typically, funcname takes on two parameters. The input parameter's value being the first, and the key/index second. If the optional userdata parameter is supplied, it will be passed as the third parameter to the callback funcname.
Returns TRUE on success or FALSE on failure.
Note: If funcname needs to be working with the actual values of the array, specify the first parameter of funcname as a reference. Then, any changes made to those elements will be made in the original array itself.
Example
[PHP]<?php
$sweet = array('a' => 'apple', 'b' => 'banana');
$fruits = array('sweet' => $sweet, 'sour' => 'lemon');
function test_print($item, $key)
{
echo "$key holds $item\n";
}
array_walk_recursive($fruits, 'test_print');
?>[/PHP]
The above example will output:
a holds apple
b holds banana
sour holds lemon
You may notice that the key 'sweet' is never displayed. Any key that holds an array will not be passed to the function.
See also
Code: Select all
array_walk(), and information about the callback type.