PHP array_diff_assoc() Function

PHP array_diff_assoc() Function

The array_diff_assoc() Function in PHP compares the difference of arrays and returns an array containing all the values from array1 that are not present in any of the other arrays.

Syntax

array_diff_assoc ( array $array1 , array $array2 [, array $... ] )

Parameter

array1(required)- This parameter signifies the input array to compare from.

array2(required)- This parameter signifies the input array to compare against.

array3….(optional)- It represents more arrays to compare against

Return

This function returns an array containing all the values from array1 that are not present in any of the other arrays.

Example 1

 "Reema", 2 => "Akash", 3 => "Sukla", 3 =>"Varun",4=>"Mukta",5=>"Amar");
 //initializing array2
 $array2 = array(1 => "Reema", 2 => "Akash", 3 => "Tisha", 3 =>"Varun");
 //computing the difference array1 and array2
 $differnce = array_diff_assoc($array1,$array2); 
 //printing the difference
 print_r($differnce);
 ?> 

Output

Array
 (
     [4] => Mukta
     [5] => Amar
 ) 

Example 2

 "Reema", 2 => "Akash", 3 => "Sukla", 4 =>"Varun",5=>"Mukta",6=>"Amar");
 //initializing array2
 $array2 = array(1 => "Reema", 2 => "Akash", 3 => "Tisha", 4 =>"Varun");
 //initializing array3 
 $array3 = array(1 => "Rahul", 2 => "Akash", 3 => "Tisha", 4 =>"Varun");
 //computing the difference array1, array2 and array3
 $differnce = array_diff_assoc($array1,$array2,$array3);
 //printing the difference
 print_r($differnce);
 ?> 

Output

Array
 (
     [3] => Sukla
     [5] => Mukta
     [6] => Amar
 ) 

Example 3

1,2=>2,3=>3,4=>4,5=>5,6=>6,7=>7,8=>8,9=>9,10=>10);
 //initializing array2 with odd number
 $array2 = array(1=>1,3=>3,5=>5,7=>7,9=>9);
 //computing the difference array1 and array2
 $differnce = array_diff_assoc($array1,$array2); 
 //printing the difference
 print_r($differnce);
 ?> 

Output

Array
 (
     [2] => 2
     [4] => 4
     [6] => 6
     [8] => 8
     [10] => 10 
 ) 

Example 4

2,3=>3,4=>4);
 //initializing array2 with odd number
 $array2 = array(1=>1,3=>3,5=>5,7=>7,9=>9);
 //computing the difference array1 and array2
 $differnce = array_diff_assoc($array1,$array2); 
 //will return error as it cnn't accept blank array
 print_r($differnce);
 ?> 

Output

PHP Fatal error:  Cannot use empty array elements in arrays in /workspace/Main.php on line 3