array_shift() to take out first element of the array and re-index the keys in PHP

array_shift(): Taking out first element of the array

$output=array_shift($input);

array_shift() to remove first element of the array

Take out the first element of the array and returns the same. After applying array_shift() total elements of the array reduces by one. All numerical array keys are re-indexed but literal keys remain same.

Returns the shifted element ( first element ) of the array.

Here $input is an array, $output get the value of first element of the array.

<?Php
$input=array('One','Two','Three','Four','Five');
$output=array_shift($input);
echo $output; // Output is  One
echo "<br><br>";
while (list ($key, $val) = each ($input)) {
echo "$key -> $val <br>";
}
?>

Output of above code is here( $output gets the first element One )

One

0 -> Two 
1 -> Three 
2 -> Four 
3 -> Five

With Literal Keys

$input=array('Fruits1' =>'Banana','Fruits2'=>'Mango','Fruits3'=>'Apple','Fruits4'=>'Grapes');
$output=array_shift($input);
echo $output; // Output is  Banana
echo "<br><br>";
while (list ($key, $val) = each ($input)) {
echo "$key -> $val <br>";
}

Output is here, ( $output gets the first element Banana)

Banana

Fruits2 -> Mango 
Fruits3 -> Apple 
Fruits4 -> Grapes

Using current

By using current() we can get the element to which the present internal pointer is pointing. By default it points to first element of the array.

$input=array('Fruits1' =>'Banana','Fruits2'=>'Mango','Fruits3'=>'Apple','Fruits4'=>'Grapes');
echo current($input); 
echo "<br>";
$output=array_shift($input);
echo current($input);

Output is here.( The first element is changed from Banana to Mango)

Banana
Mango

Array Adding & Removing Elements
array_pop(): Removing Last element of the Array
array_shift(): Removing First element of the Array
array_unset(): Removing element from any position of the Array
array_push(): Adding elements at the end of the Array
array_unshift(): Adding elements at the beginning of the Array

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