UK ['dɪf] US ['dɪf]

abbr.differential differential(of);difference different;differ different;differentiator differentiator

php array_diff() function syntax

Function:Compare the key values ​​of two arrays and return the difference

Syntax: array_diff(array1,array2,array3...)

Parameters:

##ParametersDescription array1Required. The first array to compare with other arrays. array2Required. The array to compare to the first array. array3,...Optional. Additional array to compare with the first array.

#Description: Returns the difference array of two arrays. This array contains all keys that are in the array being compared, but are not in any of the other parameter arrays. In the returned array, the key names remain unchanged.

php array_diff() function example

<?php
$class1 = array("西门"=>"55","灭绝"=>"44","无忌"=>"22");
$class2 = array("西门"=>"54","灭绝"=>"44","无忌"=>"25");
print_r(array_diff($class1,$class2 )); //返回两个数组中不一样的元素
?>

Run instance»

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Output: 

Array ( [西门] => 55 [无忌] => 22 )


<?php
$per1=array("a"=>"灭绝师太","b"=>"欧阳克","c"=>"西门大官人","d"=>"韦小宝");
$per2=array("e"=>"Peter","f"=>"慕容复","g"=>"陈近南");
$per3=array("a"=>"灭绝师太","b"=>"欧阳克","h"=>"王重阳");

$result=array_diff($per1,$per2,$per3);
print_r($result);
?>

Run Instance»

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Output: 

Array ( [c] => 西门大官人 [d] => 韦小宝 )