today myblog
date 29/12/2010
today i learning array functions in php
array_change_key_case
-----------------------
<?php
$x=array('name'=>'john','age'=>25,'city'=>'mumbai');
print_r(array_change_key_case($x,CASE_UPPER));
?>
the output for the above programme is ---->
Array ( [NAME] => john [AGE] => 25 [CITY] => mumbai )
array_combine
----------------------
this array function will taking this arguments as first array treating as array keys and the second array treated as values
so automatically the output will get an associative array
<?php
$a=array('name','age','city');
$b=array('john',25,'chennai');
$c=array_combine($a,$b);
print_r($c);
?>
the output for the above code is
Array ( [name] => john [age] => 25 [city] => chennai )
array_merge
------------
this function will combine and merge the two arrays
<?php
$x=array('name'=>'john','city'=>'chennai');
$y=array('age'=>25,'class'=>'students');
$z=array_merge($x,$y);
print_r($z);
?>
output for the above code is
Array ( [name] => john [city] => chennai [age] => 25 [class] => students )
array_count_values
--------------------
this function returns the same values how many times appeared in that array
<?php
$x=array('city','chennai','welcome','resource','gandhi','freedom','chennai','welcome','chennai','resource','city');
print_r(array_count_values($x));
?>
output for the above program is
Array ( [city] => 2 [chennai] => 3 [welcome] => 2 [resource] => 2 [gandhi] => 1 [freedom] => 1 )
array_diff_assoc
-------------------
this array function comparises two arrays and it eliminates the same values in both array and prints the odd values
<?php
$x=array('chennai','city','welcome','source');
$y=array('chennai','city','welcome');
$z=array_diff_assoc($x,$y);
print_r($z);
?>
output for the above programme is
Array ( [3] => source )
array_diff_key
-----------------
in this array function it will intersect the both array keys and eliminates them and print the odd keys first argument array key values
<?php
$array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8);
print_r(array_diff_key($array2, $array1));
?>
o/p
Array ( [yellow] => 7 [cyan] => 8 )
array_fill_key
---------------
this function will fills the key values to the array keys
<?php
$keys=array('name','school','welcome');
$y=array_fill_keys($keys,'oniorns');
print_r($y);
?>
output:-
--------------
Array ( [name] => onions [school] => onions [welcome] => onions )
array_fill
--------------
this function fills insert values into the arrays
array_flip
-------------
this function returns the values as keys and keys as values funny interesting thing to change the keys and values
<?php
$x=array('name'=>'kiran','age'=>25,'city'=>'chennai');
$y=array_flip($x);
print_r($y);
?>
output:--
------------
Array ( [kiran] => name [25] => age [chennai] => city )
array_intersect_assoc
----------------------
this function intersects both the arrays and it will print the common elements in both the arrays
<?php
$x=array('x'=>45,'y'=>25,'z'=>65);
$y=array('x'=>42,'z'=>65);
$z=array_intersect_assoc($x,$y,);
print_r($z);
?>
output of the code
Array ( [z] => 65 )
array_intersect_key
------------------------
<?php
$array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8);
print_r(array_intersect_key($array1, $array2));
?>
output for the code is
---------------------------
Array ( [blue] => 1 [green] => 3 )
array_intersect
this function returns the intersection of both the arrays
array_key_exists
----------------
this code will check whether the key exists or not in the programme
<?php
$x=array('name'=>'kiran','city'=>'chennai');
if(array_key_exists('city',$x))
{
echo "find in the array";
}
else
echo "not found in the array";
?>
output := find in the array
array_keys
------------
it will print the array keys
array_map
-------------
<?php
function scope($x)
{
return($x*$x*$x);
}
$a=array(4,5,8,9);
$b=array_map("scope",$a);
print_r($b);
?>
the above code represents the array_map it getting the value from the array and pass it to another array for calucalting the function
output is
Array ( [0] => 64 [1] => 125 [2] => 512 [3] => 729 )
