PHP array_diff() function

In this chapter you will learn:

1. Syntax for PHP array_diff() function
2. Description for PHP array_diff() function
3. Parameter for PHP array_diff() function
4. Example - Find the difference between two arrays
5. Example - Different two associative arrays

Syntax

PHP array_diff() function has the following syntax

Description

The array_diff() function returns a new array containing all the values of array $arr1 that do not exist in array $arr2.

You can diff several arrays by providing more parameters. The function will return an array of values in the first array that do not appear in the second and subsequent arrays.

For example:

Parameter

Example 1

Find the difference between two arrays

<?PHP//from j  av a  2 s  .c o m
$toppings1 = array("A", "B", "C", "D");
$toppings2 = array("C", "D", "java2s.com");
$diff_toppings = array_diff($toppings1, $toppings2);

var_dump($diff_toppings);
?>

The code above generates the following result.

Example 2

Different two associative arrays

<?php//from   j  a  v  a2s.co m
$a1=array("a"=>"A","b"=>"B","c"=>"C","j"=>"java2s.com");
$a2=array("e"=>"E","f"=>"F","g"=>"Good");
$a3=array("a"=>"Apple","b"=>"New B","h"=>"Help");

$result=array_diff($a1,$a2,$a3);
print_r($result);
?>

The code above generates the following result.

Next chapter...

What you will learn in the next chapter:

1. Description for PHP array_diff_assoc() Function
2. Syntax for PHP array_diff_assoc() Function
3. Parameter for PHP array_diff_assoc() Function
4. Example - Compare the keys and values of two arrays, and return the differences
5. Example - Compare the keys and values of three arrays, and return the differences

PHP array() function

PHP array_change_key_case() function

PHP array_chunk() function

PHP array_combine() function

PHP array_count_values() function

PHP array_diff() function

PHP array_diff_assoc() Function

PHP array_diff_key() function

PHP array_diff_uassoc() function

PHP array_diff_ukey() function

PHP array_fill() function

PHP array_fill_keys() function

PHP array_filter() function

PHP array_flip() function

PHP array_intersect() Function

PHP array_intersect_assoc() Function

PHP array_intersect_key() function

PHP array_intersect_uassoc() Function

PHP array_intersect_ukey() Function

PHP array_key_exists() Function

PHP array_keys() function

PHP array_map() Function

PHP array_merge() function

PHP array_merge_recursive() Function

PHP array_multisort() Function

PHP array_pad() Function

PHP array_pop() function

PHP array_product() Function

PHP array_push() function

PHP array_rand() function

PHP array_reduce() Function

PHP array_replace() Function

PHP array_replace_recursive() Function

PHP array_reverse() Function

PHP array_search() Function

PHP array_shift() Function

PHP array_slice() Function

PHP array_splice() Function

PHP array_sum() Function

PHP array_udiff() Function

PHP array_udiff_assoc() Function

PHP array_udiff_uassoc() Function

PHP array_uintersect() Function

PHP array_uintersect_assoc() Function

PHP array_uintersect_uassoc() Function

PHP array_unique() Function

PHP array_unshift() Function

PHP array_values() Function

PHP array_walk() Function

PHP array_walk_recursive() Function

PHP arsort() Function

PHP asort() Function

PHP compact() Function

PHP count() Function

PHP current() Function

PHP each() Function

PHP end() Function

PHP explode() Function

PHP extract() Function

PHP implode() Function

PHP in_array() Function

PHP key() Function

PHP krsort() Function

PHP ksort() Function

PHP list() Function

PHP natcasesort() Function

PHP natsort() Function

PHP next() Function

PHP pos() Function

PHP prev() Function

PHP range() Function

PHP reset() Function

PHP rsort() Function

PHP shuffle() Function

PHP sizeof() Function

PHP sort() Function

PHP uasort() Function

PHP uksort() Function

PHP usort() Function