reset


php128 apg

SETS the internal pointer of an ARRAY to its first ELEMENT.





This function returns FALSE if ARRAY is EMPTY.



<?php

mix reset ( arr &$array )

where,

$array = The given input ARRAY

?>

 $array 


The given input array.

Can be passed by reference.



  1 EXERCISE   

<?php

$arr01r =  [ "first index" => "FIRST ELEMENT",
               "second index" => "SECOND ELEMENT", 
                  "third index" => "THIRD ELEMENT", 
                "fourth index" => "FOURTH ELEMENT", 
                  "fifth index" => "FIFITH ELEMENT", 
                 "sixth index" => "SIXTH ELEMENT" ]; 

echo 'The given ARRAY:<br>';
print_r($arr01r);

echo '<br><br>The current INDEX:<br>';
$ndx01r = key($arr01r);
print_r($ndx01r);

echo '<br><br>The current ELEMENT:<br>';
$frs01r = current($arr01r);
print_r($frs01r);

echo '<br><br>The last INDEX:<br>';
$lst01r = end($arr01r);
$key01r = key($arr01r);
print_r($key01r);

echo '<br><br>The last ELEMENT:<br>';
print_r($lst01r);

echo '<br><br>(The internal pointer have reset 2 times)<br>';
$prev01r1 = prev($arr01r);
$prev01r2 = prev($arr01r);

echo 'The current INDEX:<br>';
$key01r2 = key($arr01r);
print_r($key01r2);

echo '<br><br>The current ELEMENT:<br>';
print_r($prev01r2);

echo '<br><br>(Reset the internal pointer to its first ELEMENT)<br>';
$res01r3 = reset($arr01r);

echo 'The current INDEX:<br>';
$ndx01r3 = key($arr01r);
print_r($ndx01r3);

echo '<br><br>The current ELEMENT:<br>';
print_r($res01r3);

?>

 RESULT   

The given ARRAY:
Array
(
[first index] => FIRST ELEMENT
[second index] => SECOND ELEMENT
[third index] => THIRD ELEMENT
[fourth index] => FOURTH ELEMENT
[fifth index] => FIFITH ELEMENT
[sixth index] => SIXTH ELEMENT
)


The current INDEX:
first index

The current ELEMENT:
FIRST ELEMENT

The last INDEX:
sixth index

The last ELEMENT:
SIXTH ELEMENT

(The internal pointer have reset 2 times)
The current INDEX:
fourth index

The current ELEMENT:
FOURTH ELEMENT

(Reset the internal pointer to its first ELEMENT)
The current INDEX:
first index

The current ELEMENT:
FIRST ELEMENT

  2 EXERCISE   

<?php

$arr02r =  []; 

echo 'The given ARRAY:<br>';
print_r($arr02r);

echo '<br><br>The current INDEX:<br>';
$ndx02r = key($arr02r);
var_dump($ndx02r);

echo '<br><br>The current ELEMENT:<br>';
$frs02r = current($arr02r);
var_dump($frs02r);

echo '<br><br>The last INDEX:<br>';
$lst02r = end($arr02r);
$key02r = key($arr02r);
var_dump($key02r);

echo '<br><br>The last ELEMENT:<br>';
var_dump($lst02r);

echo '<br><br>(The internal pointer have reset 2 times)<br>';
$prev02r1 = prev($arr02r);
$prev02r2 = prev($arr02r);

echo 'The current INDEX:<br>';
$key02r2 = key($arr02r);
var_dump($key02r2);

echo '<br><br>The current ELEMENT:<br>';
var_dump($prev02r2);

echo '<br><br>(Reset the internal pointer to its first ELEMENT)<br>';
$res02r3 = reset($arr02r);

echo 'The current INDEX:<br>';
$ndx02r3 = key($arr02r);
var_dump($ndx02r3);

echo '<br><br>The current ELEMENT:<br>';
var_dump($res02r3);

?>