Posted By
Bajarangi soft ,
Posted On 03-12-2020
Examples:
Input : array( "name" => "Anand", "roll"=> "1")
Output : Array (
[roll] => 1
)
Input : array( "1" => "Add", "2" => "Multiply", "3" => "Divide")
Output : Array (
[2] => Multiply
[3] => Divide
)
Method 1: Using unset() function: The unset() function is used to unset a key and its value in an associative array.
Syntax:
void unset( $array_name['key_to_be_removed'] )
<?php
$arr=array("1"=>"add","2"=>"multiply","3"=>"division");
unset($arr['1']);
print_r($arr);
?>
Method 2: Using array_diff_key() function: This function is used to get the difference between one or more arrays. This function compares the keys between one or more arrays and returns the difference between them.
Syntax:
array array_diff_key( $array_name, array_flip((array) ['keys_to_be_removed'] )
<?php
$arr=array("1"=>"a","2"=>"b","3"=>"c");
$result=array_diff_key($arr,array_flip((array)['1']));
print_r($result);
?>