PHP array_diff() Function
Example
Compare the values of two arrays, and return the differences:
<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("e"=>"red","f"=>"green","g"=>"blue");
$result=array_diff($a1,$a2);
print_r($result);
?>
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Definition and Usage
The array_diff() function compares the values of two (or more) arrays, and returns the differences.
This function compares the values of two (or more) arrays, and return an array that contains the entries from array1 that are not present in array2 or array3, etc.
Syntax
array_diff(array1,array2,array3...);
| Parameter | Description |
|---|---|
| array1 | Required. The array to compare from |
| array2 | Required. An array to compare against |
| array3,... | Optional. More arrays to compare against |
Technical Details
| Return Value: | Returns an array containing the entries from array1 that are not present in any of the other arrays |
|---|---|
| PHP Version: | 4.0.1+ |
More Examples
Example 1
Compare the values of three arrays, and return the differences:
<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("e"=>"red","f"=>"black","g"=>"purple");
$a3=array("a"=>"red","b"=>"black","h"=>"yellow");
$result=array_diff($a1,$a2,$a3);
print_r($result);
?>
Run example »
❮ PHP Array Reference
