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Method: 1. Use array_diff() to compare based on the array key value, the syntax is "array_diff(array 1, array 2)"; 2. Use array_diff_assoc() to compare based on the array "key/value pair", Syntax "array_diff_assoc(array1,array2)".
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
Method 1: Use array_diff() Function - Compare the key values of the array
array_diff($arr1,$arr2...)
The function only compares the key values of the array and will return a difference array. The elements in the set array exist in the compared array $arr1
, but do not exist in other parameter arrays $arr2...
.
Example:
<?php header("Content-type:text/html;charset=utf-8"); $arr1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow"); $arr2=array("a"=>"orange","b"=>"green","e"=>"red","r"=>"yellow"); var_dump($arr1); var_dump($arr2); $result=array_diff($arr1,$arr2); echo "两个数组中,不同的元素为:"; var_dump($result); ?>
Output result:
Method 2: Use array_diff_assoc() function --Compare the key names and key values of the array
array_diff_assoc($arr1,$arr2...)
The function will compare the key names and key values of the array and return the same A difference array, the difference elements will be obtained from the compared array $arr1
just like array_diff().
<?php header("Content-type:text/html;charset=utf-8"); $arr1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow"); $arr2=array("a"=>"orange","b"=>"green","e"=>"red","r"=>"yellow"); var_dump($arr1); var_dump($arr2); $result=array_diff_assoc($arr1,$arr2); echo "两个数组中,不同的元素为:"; var_dump($result); ?>
Output result:
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