PHP: array_intersect() function

Last update on August 19 2022 21:51:17 (UTC/GMT +8 hours)

PHP: Computes the intersection of arrays

The array_intersect() function is used to compare two or more arrays and returns an array containing all the values of the first array that are present in other arrays. In this operation, keys are preserved.

Version:

(PHP 4 and above)

Syntax:

array_diff (array1, array2, array3 ... )

Parameters:

Name	Description	Required / Optional	Type
array1	Reference array.	Required	Array
array2	Compared with the first array.	Required	Array
array3..	Compared with the first array	Optional	Array

Return value:

An array containing all the keys and values in array1 if it's values exist in array2, array3 etc.

Value Type: Array

Example:

<?php
$array1=array("Orange" => 100, "Apple" => 200, "Banana" => 300, "Cherry" => 400);
$array2=array("Orange" => 100, "Apple" => 200, "Banana" => 300);
$result=array_intersect($array1, $array2);
print_r($result);
?>

Output:

Array ( [Orange] => 100 [Apple] => 200 [Banana] => 300 )

Pictorial Presentation:

php function reference: array_intersect() function

View the example in the browser

Practice here online :

See also

PHP Function Reference

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PHP: Tips of the Day

Filters the collection using the given callback

Example:

<?php
function tips_reject($items, $func)
{
  return array_values(array_diff($items, array_filter($items, $func)));
}

print_r(tips_reject(['Apple', 'Pear', 'Kiwi', 'Banana'], function ($item) {
  return strlen($item) > 4;
}));
?>

Output:

Array
(
    [0] => Pear
    [1] => Kiwi
)