How to check if a Set contains all the items of Another Set in PHP - Step by Step Examples

How to check if a Set contains all the items of Another Set in PHP ?

Answer

To check if a Set contains all the items of another Set in PHP, you can use the array_intersect function.


✐ Examples

1 Check if Set Contains All Items

In this example,

  1. We define two arrays representing Sets named $set1 and $set2.
  2. We use the array_intersect function to find the common elements between $set1 and $set2.
  3. If the size of the intersection equals the size of $set2, then $set1 contains all items of $set2.
  4. Finally, we print the result to the console.

PHP Program

<?php
// Define Sets with items
$set1 = ["apple", "banana", "orange", "grape", "melon"];
$set2 = ["banana", "orange"];

// Check if set1 contains all items of set2
$containsAllItems = count(array_intersect($set1, $set2)) === count($set2);

// Print result
echo "Does set1 contain all items of set2? ".($containsAllItems ? 'true' : 'false');
?>

Output

Does set1 contain all items of set2? true

2 Check if Set Does Not Contain All Items

In this example,

  1. We define two arrays representing Sets named $set1 and $set2.
  2. We use the array_intersect function to find the common elements between $set1 and $set2.
  3. If the size of the intersection does not equal the size of $set2, then $set1 does not contain all items of $set2.
  4. Finally, we print the result to the console.

PHP Program

<?php
// Define Sets with items
$set1 = ["apple", "banana", "orange", "grape", "melon"];
$set2 = ["banana", "peach"];

// Check if set1 contains all items of set2
$containsAllItems = count(array_intersect($set1, $set2)) === count($set2);

// Print result
echo "Does set1 contain all items of set2? ".($containsAllItems ? 'true' : 'false');
?>

Output

Does set1 contain all items of set2? false

Summary

In this tutorial, we learned How to check if a Set contains all the items of Another Set in PHP language with well detailed examples.


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