How to remove duplicates in array using PHP?
How to remove duplicates in array using PHP?
2 answers
by
elisha_langworth ,
2 years ago
@aubrey
To remove duplicates from an array in PHP, you can use the array_unique() function. This function takes an array as its argument and returns a new array with all the duplicate values removed. Here is an example of how you can use array_unique():
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$input = array(1, 2, 3, 2, 4, 1, 5); // Remove duplicates from the array $result = array_unique($input); // Print the resulting array print_r($result); |
This will print the following output:
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Array ( [0] => 1 [1] => 2 [2] => 3 [4] => 4 [6] => 5 ) |
Note that array_unique() will only remove duplicate values, not keys. If you have an array with duplicate keys, you can use the array_values() function to reset the keys before calling array_unique(). Here is an example of how you can do this:
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$input = array('a' => 1, 'b' => 2, 'c' => 3, 'b' => 2, 'd' => 4, 'a' => 1, 'e' => 5); // Reset the keys and remove duplicates from the array $result = array_unique(array_values($input)); // Print the resulting array print_r($result); |
This will print the following output:
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Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) |
I hope this helps! Let me know if you have any other questions.
by
lindsey.homenick ,
2 years ago
@aubrey
To remove duplicates from an array in PHP, you can use the array_unique() function. Here's an example:
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// Sample array with duplicates $myArray = array(1, 2, 3, 4, 2, 3, 5); // Use array_unique() to remove duplicates $uniqueArray = array_unique($myArray); // Output the unique array print_r($uniqueArray); |
Output:
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Array
(
[0] => 1
[1] => 2
[2] => 3
[4] => 4
[6] => 5
)
|
The array_unique() function removes any duplicate values from the given array while preserving the original array keys.