PHP Tutorial - PHP array_uintersect() Function

Definition

The array_uintersect() function uses a user-defined function to compare the values of two or more arrays, and returns the matches.

Syntax

PHP array_uintersect() Function has the following syntax.

array_uintersect(array1,array2,array3...,myfunction)

Parameter

Parameter	Is Required	Description
array1	Required.	Array to compare from
array2	Required.	Array to compare against
array3,...	Optional.	More arrays to compare against
myfunction	Required.	Comparison function name.

myfunction must return an integer <, =, or > than 0 if the first argument is <, =, or > than the second argument.

Example 1

uses a user-defined function to compare the values of two arrays, and returns the matches


<?php/* w w w.ja  v  a  2 s .  com*/
function myfunction($a,$b){
    if ($a===$b){
      return 0;
    }
    return ($a>$b)?1:-1;
}

$a1=array("a"=>"A","b"=>"HTML","c"=>"java2s.com");
$a2=array("a"=>"Apple","b"=>"HTML","e"=>"PHP");

$result=array_uintersect($a1,$a2,"myfunction");
print_r($result);
?>

The code above generates the following result.

Example 2

uses a user-defined function to compare the values of three arrays, and returns the matches


<?php/*w  w w. j a v a  2s.  co  m*/
function myfunction($a,$b){
    if ($a===$b){
      return 0;
    }
    return ($a>$b)?1:-1;
}

$a1=array("a"=>"A","b"=>"HTML","c"=>"java2s.com");
$a2=array("a"=>"Apple","b"=>"CSS","e"=>"PHP");
$a3=array("a"=>"At","b"=>"CSS","X","Y");

$result=array_uintersect($a1,$a2,$a3,"myfunction");
print_r($result);
?>

The code above generates the following result.