PHP array_reduce() Function

Definition and Usage

The array_reduce() function sends the values in an array to a user-defined function, and returns a string.

Syntax

array_reduce(array,function,initial)

Parameter	Description
array	Required. Specifies an array
function	Required. Specifies the name of the function
initial	Optional. Specifies the initial value to send to the function

---

Example 1

<?php
function myfunction($v1,$v2)
{
return $v1 . "-" . $v2;
}
$a=array("Dog","Cat","Horse");
print_r(array_reduce($a,"myfunction"));
?> 

 

OUTPUT :

-Dog-Cat-Horse

---

Example 2

With the initial parameter:

<?php
function myfunction($v1,$v2)
{
return $v1 . "-" . $v2;
}
$a=array("Dog","Cat","Horse");
print_r(array_reduce($a,"myfunction",5));
?> 

 

OUTPUT :

5-Dog-Cat-Horse

---

Example 3

Returning a sum:

<?php
function myfunction($v1,$v2)
{
return $v1+$v2;
}
$a=array(10,15,20);
print_r(array_reduce($a,"myfunction",5)); ?>

OUTPUT :

50