PHP ONLINE EDITORS || ARRAY IN PHP AND ARRAY FUNCTIONS || ITERATOR FUNCTIONS

PHP ONLINE EDITORS

• WRITE PHP ONLINE

• PAIZA PHP EDITOR

• PHP EDITOR

• JDOODLE PHP EDITOR

• PHP TESTER EDITOR

• SANDBOX PHP EDITOR

• REXTESTER PHP EDITOR

• PHP FIDDLE EDITOR

ARRAY IN PHP

Index array - an array with numeric index.

?php

$name=array("amar","akbar","anthony","joker";

var_dump($name);

?>

output - array([0]=>amar,[1]=>akbar,[2]=>anthony,[3]=>joker)

Associative array - an array with string as a index and scrolls element values in association key values.

<?php

$name=array(0=>amar,1=>akbar,2=>anthony,3=>joker)

var_dump($name);

?>

output -([0]=>amar,[1]=>akbar,[2]=>anthony,[3]=>joker)

Multidimenssion array - an array contains one or more array and values.

 ARRAY FUNCTIONS

1) Sort() - this function sort an index array in asending order

    e.g  -

<?php
$animal=array("cat","dog",''tiger","lion");
$a=sort($animal);
print_r($a);
?>

output - array{a[0]=>cat,a[1]=>dog,a[2]=>lion,a[3]=>tiger}

2) rsort() - this function sort an index array in desending order.

    e.g  -

<?php
$animal=array("cat","dog",''tiger","lion");
$a=rsort($animal);
print_r($a);
?>

output - array{a[0]=>tiger,a[1]=>lion,a[2]=>dog,a[3]=>cat}

3) asort() - this function is used to sort associative array values in asending order.



    e.g  -

<?php
$animal=array("0"=>"cat","1"=>"dog","2"=>''tiger","3"=>"lion");
$a=asort($animal);
print_r($a);
?>

output - array{a[0]=>cat,a[1]=>dog,a[2]=>lion,a[3]=>tiger}

4) arsort() - this function is use for to sort associative array in desending order.

eg -

<?php
$animal=array("0"=>"cat","1"=>"dog","2"=>''tiger","3"=>"lion");
$a=arsort($animal);
print_r($a);
?>

output - array{a[2]=>tiger,a[3]=>lion,a[1]=>dog,a[0]=>cat}

5) ksort() - the ksort function sort keys arrayin asending order.

    e.g  -
  e.g  -

<?php
$animal=array("0"=>"cat","1"=>"dog","2"=>''tiger","3"=>"lion");
$a=ksort($animal);
print_r($a);
?>

output - array{a[0]=>cat,a[1]=>dog,a[2]=>lion,a[3]=>tiger}

6)krsort() - the krsort function sort the key of array in desending order.

eg -

<?php
$animal=array("0"=>"cat","1"=>"dog","2"=>''tiger","3"=>"lion");
$a=krsort($animal);
print_r($a);
?>

output - array{a[3]=>lion,a[2]=>tiger,a[1]=>dog,a[0]=>cat}

7) array_push() - this function is used to add values on to the end off  the array.

eg -

<?php
$animal=array("cat","dog",''tiger");
$a=array_push($animal,"lion");
print_r($a);
?>

output - output - array{a[0]=>cat,a[1]=>dog,a[2]=>tiger,a[3]=>lion}

8) array_pop() - this function is used to remove values from array.

eg - 

<?php
$animal=array("cat","dog",''tiger","lion");
$a=array_push($animal);
print_r($a);
?>

output - output - array{a[0]=>cat,a[1]=>dog,a[2]=>tiger,}

9) array_shift() - this function remove first element of array.

eg - 

<?php
$animal=array("cat","dog",''tiger","lion");
$a=array_shift($animal);
print_r($a);
?>

output - output - array{a[0]=>cat,a[1]=>dog,a[2]=>tiger,a[3]=>lion}

10) array_unshift() - this function  insert new element in array and the new value will be inserted in the beginning  of the array.

eg - 

<?php
$animal=array("dog",''tiger","lion");
$a=array_unshift($animal,"cat");
print_r($a);
?>

output - output - array{a[0]=>cat,a[1]=>dog,a[2]=>tiger,a[3]=>lion}

ITERATOR  FUNCTION

Every php array keeps track of the current element the pointer to the current element it knows as iterator function.

1) current() - it returns the currently pointed elements.

2) reset() - its move the iterator to the first element.

3) next() - its move the iterator to the next element.

4) previous() - its move the iterator to the previous element.

5) end() - its move the iterator to last position.

6) key() - it returns the key of a element.
eg - 

<?php
$transport=array("foot","bike","car","plane");
$mode=current($transport);
$mode=next($transport);

$mode=current($transport);

$mode=previous($transport);

$mode=end($transport);

$mode=current($transport);

?>

output - foot

              bike

              bike 

              foot

              plane

              plane